CN204705564U - PM2.5 online enrichment method mouth and nose exposure system - Google Patents

Abstract

The utility model discloses a kind of PM2.5 online enrichment method mouth and nose exposure system, it comprises: impact cutter, for removing the particle that in air draught, aerodynamics equivalent diameter is larger; Water bath device, mixes with water vapor for making air-flow; Refrigerating plant, grows up for making at least part of particle in air-flow; Concentrating and separating device, for airflow diversion being become the first air-flow and the second air-flow, and makes equivalent aerodynamic diameter rise to the particle being more than or equal to 2.5 microns to be arranged in the first air-flow; Drying device, for dry first air-flow; Mouth and nose exposing device, has the first air pump and exposure chamber, and the first air pump makes the first air-flow in drying device enter exposure chamber; With the second air pump, be configured to aspirate the second air-flow from concentrating and separating device.This system can improve the PM2.5 particulate in air, and the animal in exposure chamber is absorbed, and to observe the reaction of animal, thus understands the harm of these particles.

Description

PM2.5 online enrichment method mouth and nose exposure system

Technical field

the utility model belongs to the concentration technical field of the small particle improved in air-flow, particularly relates to a kind of PM2.5 online enrichment method mouth and nose exposure system.

Background technology

along with the raising of socioeconomic development and people's living standard, the waste gas of factory and motor vehicle emission gets more and more, and easily makes air muddy, and the visual field is fuzzy and cause visibility deterioration, thus occurs haze weather.Haze primarily of sulphuric dioxide, oxides of nitrogenwith pellet these three compositions, they and fog combine, and allow skybecome gloomily gloomy instantaneously. sulphuric dioxide, oxides of nitrogenfor gaseous contaminant, pellet is only the arch-criminal increasing the weight of haze weather and pollute.The english abbreviation of particle is PM, and what Beijing was monitored is pM2.5, namely equivalent aerodynamic diameter is less than or equal to the contaminant particle of 2.5 microns.This particle itself is a kind of pollutant, is again heavy metal, palycyclic aromaticin the carrier of noxious material, if these particles of absorption of human body, the injury that will cause human body is unknown, and the potential danger therefore studying pollutants in air particle is imperative.

in order to study the harmfulness of contaminant particle, usually making animal absorb these contaminant particles, observing the reflection of animal and animal being carried out to the harmfulness of the particle dissecting etc. to understand in haze.But the aerial relative concentration of these particles is lower, if be directly used in zoopery, the cycle of needs is long, and effect is obvious not.How effectively gather the PM2.5 particulate in air, and the PM2.5 particulate in air is applied to animal mouth and nose or systemic exposure experiment is technical matters urgently to be resolved hurrily.

Utility model content

the purpose of this utility model aims to provide a kind of PM2.5 online enrichment method mouth and nose exposure system, the particle of aerodynamics equivalent diameter below 2.5 μm in air-flow can be gathered, namely PM2.5 particulate can be gathered, and improve the concentration of PM2.5 particulate, and PM2.5 particulate is used for animal mouth and nose exposure experiment.

for this reason, the utility model provides a kind of PM2.5 online enrichment method mouth and nose exposure system, and this PM2.5 online enrichment method mouth and nose exposure system can comprise:

impact cutter, be configured to admission of air air-flow, and remove the particle that in described air draught, aerodynamics equivalent diameter is greater than 2.5 μm at least in part;

water bath device, is configured to receive the air-flow from described impact cutter, mixes to make the air-flow from described impact cutter with the water vapor that described water bath device produces;

refrigerating plant, is configured to the mixed airflow that receives from described water bath device and reduces the temperature of described mixed airflow, being more than or equal to 2.5 μm to make the equivalent aerodynamic diameter of at least part of particle in described mixed airflow rise to;

concentrating and separating device, be configured to receive the air-flow from described refrigerating plant, and the airflow diversion from described refrigerating plant is become the first air-flow and the second air-flow, and make in the air-flow from described refrigerating plant, equivalent aerodynamic diameter rises to all particulates being more than or equal to 2.5 μm is partly or entirely arranged in described first air-flow;

drying device, is configured to receive and dry described first air-flow from described concentrating and separating device; With

mouth and nose exposing device, it has the first air pump and exposure chamber, and described first air pump is configured to make described first air-flow in described drying device enter described exposure chamber; And

second air pump, is configured to aspirate described second air-flow from described concentrating and separating device.

further, described PM2.5 online enrichment method mouth and nose exposure system also comprises:

first flow controller, is arranged on the air inlet pipeline of described first air pump, flows through described first air pump to make described first air-flow with first flow; With

second amount controller, is arranged on the air inlet pipeline of described second air pump, and to make described second air-flow flow through described second air pump with the second flow, and the ratio of described second flow and described first flow is 40 to 60.

further, be limited with for the first passage by described first air-flow with for the second channel by dry gas in described drying device, to make described dry gas, drying carried out to described first air-flow; And

the air inlet pipeline of described second channel is provided with the 3rd flow controller, described 3rd flow controller is configured to the flow regulating described dry gas, has predetermined humidity value to make described first air-flow entering described mouth and nose exposing device.

further, described refrigerating plant comprises one or more freezing unit;

described concentrating and separating device comprises one or more concentrating and separating unit, is configured to respectively receive the air-flow from a described freezing unit.

further, each described freezing unit comprises outer tube and pipe in extending in described outer tube, the two ends of described interior pipe are communicated with a described concentrating and separating unit with described water bath device respectively, and the passage limited between described outer tube wall and described outer wall of inner tube is for passing the flowing of cold medium; And described refrigerating plant also comprises refrigeration unit, the cold medium of described biography be configured to flowing into described one or more freezing unit provides cold.

further, described water bath device comprises:

water bath, it has top cover, and each described freezing unit is installed on described top cover vertically; With

heating arrangement, is configured to heat the water in described water bath.

further, each described concentrating and separating unit comprises one or more Virtual cropping device, each described Virtual cropping utensil has airflow inlet, the first air stream outlet and the second air stream outlet, and in described multiple Virtual cropping device, the first air stream outlet of each described Virtual cropping device is communicated with the airflow inlet of the described Virtual cropping device being adjacent to its downstream.

further, each described Virtual cropping device comprises:

housing, is limited with accommodation cavity in it, it offers described second air stream outlet;

first jet, stretches into described accommodation cavity, and its one end is described airflow inlet, and the gas channel that limits of at least part of pipeline section of described first jet reduces gradually along the direction of air flow direction in it; With

second nozzle, it is positioned at described accommodation cavity at least partly, and with described first jet coaxial spaced arrange, one end away from described first jet of described second nozzle is described first air stream outlet, and the gas channel that limits of at least part of pipeline section of described second nozzle expands gradually along the direction of air flow direction in it.

further, each described Virtual cropping device also comprises drainpipe, so that the water in described housing is discharged described housing.

further, described exposure chamber comprises:

inner core, its perisporium offers multilayer hole;

urceolus, is coaxially arranged with described inner core, the perisporium of described urceolus offers multilayer mounting hole, and a hole of each mounting hole of described urceolus and described inner core is coaxially arranged;

upper end cover, is installed on the top of described inner core and described urceolus, offers central hole in the middle part of it, utilizes pipeline to be communicated with described inner core via described central hole to make described first air pump;

bottom end cover, is installed on the bottom of described inner core and described urceolus, and it offers the spaced air hole of multiple circumferential direction along described bottom end cover, each described air hole is communicated with the space between described inner core and described urceolus;

multiple animal holder, each described animal holder is installed on a described mounting hole of described urceolus, and each described animal holder has the opening be communicated with described urceolus;

multiple connecting pipe, a mounting hole of each described connecting pipe and described urceolus is coaxially arranged, two ends stretch into a hole of described inner core and the opening of a described animal holder respectively, to be communicated with described inner core and a described animal holder, and the overall diameter of each described connecting pipe is less than the diameter of the opening of each described animal holder.

pM2.5 of the present utility model online enrichment method mouth and nose exposure system, because the PM2.5 particulate in air can be made to grow up, with effectively by the PM2.5 particulate in air with fraction burbling out, significantly improves the concentration of PM2.5 particulate.And, PM2.5 of the present utility model online enrichment method mouth and nose exposure system these can be grown up after PM2.5 particulate carry out drying, thus PM2.5 particulate after making these grow up restores to the original state, and reaches the domain size distribution identical with in air.Further, the PM2.5 particulate collected is transported in exposure chamber and absorbs for animal by this PM2.5 online enrichment method mouth and nose exposure system, to observe the reaction of animal, thus understands the harm of these PM2.5 particulates.

Accompanying drawing explanation

hereinafter describe specific embodiments more of the present utility model with reference to the accompanying drawings by way of example, and not by way of limitation in detail.Reference numeral identical in accompanying drawing denotes same or similar parts or part.It should be appreciated by those skilled in the art that these accompanying drawings may not be drawn in proportion.In accompanying drawing:

fig. 1 is the schematic diagram of the PM2.5 online enrichment method mouth and nose exposure system according to the utility model embodiment;

fig. 2 is the schematic partial structurtes cut-open view of the PM2.5 online enrichment method mouth and nose exposure system according to the utility model embodiment;

fig. 3 is the schematic partial enlarged view at the place of A shown in Fig. 2;

fig. 4 is the schematic cross sectional views of exposure chamber in the PM2.5 online enrichment method mouth and nose exposure system according to the utility model embodiment.

Embodiment

for making the object of the utility model embodiment, technical scheme and advantage clearly, below in conjunction with accompanying drawing, specific embodiment is described in detail.

fig. 1 is the schematic diagram of the PM2.5 online enrichment method mouth and nose exposure system according to the utility model embodiment, and as shown in Figure 1, the utility model embodiment provides a kind of PM2.5 online enrichment method mouth and nose exposure system.This PM2.5 online enrichment method mouth and nose exposure system comprises impact cutter 100, water bath device 200, refrigerating plant 300, concentrating and separating device 400, drying device 500, mouth and nose exposing device 600 and the second air pump 800.

particularly, impact cutter 100 and be configured to admission of air air-flow, and remove the particle that in air draught, aerodynamics equivalent diameter is greater than 2.5 μm at least in part.

water bath device 200 is configured to receive the air-flow from impacting cutter 100, to make the air-flow from impacting cutter 100 mix with the water vapor that water bath device 200 produces, air-flow can be made to heat up simultaneously.Refrigerating plant 300 is configured to the mixed airflow that receives from water bath device 200 and reduces the temperature of described mixed airflow, is more than or equal to 2.5 μm to make the equivalent aerodynamic diameter of at least part of particle in mixed airflow rise to.That is water bath device 200 and refrigerating plant 300 can make the particle tuberculosis in mixed airflow grow up.

concentrating and separating device 400 is configured to receive the air-flow from refrigerating plant 300, and the airflow diversion from this refrigerating plant 300 is become the first air-flow and the second air-flow.Especially, concentrating and separating device 400 can make in the air-flow from refrigerating plant 300, equivalent aerodynamic diameter rises to all particulates being more than or equal to 2.5 μm is partly or entirely arranged in the first air-flow.Here the part said refers to major part, is about more than or equal to whole 85%.It should be noted that in described first air-flow that also may comprise a small amount of, equivalent aerodynamic diameter rises to the particle being less than 2.5 μm here.Concentrating and separating device 400 simultaneously also makes in the air-flow from the refrigerating plant 300 be connected, equivalent aerodynamic diameter increase be less than all particulates of 2.5 μm be partly or entirely arranged in described second air-flow.Namely concentrating and separating device 400 plays the vital role being separated equivalent aerodynamic diameter in whole PM2.5 online enrichment method mouth and nose exposure system.

drying device 500 is configured to receive and dry the first air-flow from concentrating and separating device 400, and the particle of growing up to make tuberculosis recovers original equivalent aerodynamic diameter.

mouth and nose exposing device 600 can have the first air pump 610 and exposure chamber 620, first air pump 610 is configured to make the first air-flow in drying device 500 enter exposure chamber 620, and the first air-flow can be absorbed by animal in exposure chamber.Particularly, the import of exposure chamber 620 can be communicated with the first air stream outlet of drying device 500, the waste gas outlet of exposure chamber 620 can with the inlet communication of the first air pump 610.

second air pump 800 is configured to aspirate the second air-flow from concentrating and separating device 400.First air pump 610 and the second air pump 800 are for providing power for whole system.

in certain embodiments, on the air inlet pipeline of the first air pump 610 and the second air pump 800, first flow controller 710 and second amount controller 720 can be set, to regulate the flow of the first air-flow and the second air-flow respectively.First flow controller 710 makes the first air-flow flow through the first air pump 610 with first flow, second amount controller 720 makes the second air-flow flow through the second air pump 800 with the second flow, and second the ratio of flow and first flow be 40 to 60, to significantly improve the concentration of the particle collected.

in certain embodiments, can be limited with for the first passage by the first air-flow with for the second channel by dry gas in drying device 500, to make dry gas, drying be carried out to the first air-flow.Such as, this drying device 500 can comprise the drying tube and Nafion barrier film that are limited with dry place.Nafion barrier film also can be called as permeable hermetically sealable film, is configured to dry place to be divided into for by the first passage of the first air-flow and the second channel that is used for by dry gas.Dry gas stream and the reverse flow in dry place of the first air-flow, to improve drying efficiency.Further, this drying device 500 also can comprise vacuum pump, and the outlet of its import and second channel flows in second channel to make dry gas.In order to improve drying efficiency further, this drying device also can comprise heating arrangement, is arranged on the upstream of the second channel of drying tube.Be unlikely to over-drying to prevent the first air-flow flowing out drying device, the PM2.5 online enrichment method mouth and nose exposure system of the utility model embodiment also can comprise the 3rd flow controller, be arranged on the air inlet pipeline of the second channel of drying device, be configured to the flow regulating dry gas, to make the first air-flow entering nose exposing device 600, there is predetermined humidity value.In some alternate embodiment, drying device can comprise drying tube and be positioned at the drying agent of drying tube, and drying agent can be made tubular structure, flows through in the center through hole of tubular drying agent to make the first air-flow.

the course of work of the PM2.5 online enrichment method mouth and nose exposure system of the utility model embodiment can be specific as follows:

open the first air pump 610 and the second air pump 800, original air is entered at a high speed with the flow of 1000L/min to be impacted in cutter 100, particle equivalent aerodynamic diameter being greater than 2.5 μm after being acted on by impact cutter 100 is removed or filtering, only leave the particle that equivalent aerodynamic diameter is less than or equal to 2.5 μm, as PM2.5 particulate, PM2.5 particulate fully absorbs moisture in water bath device 200, then after refrigerating plant 300 is cooled, particle tuberculosis is grown up, now the equivalent aerodynamic diameter of most of PM2.5 particulate can increase between 3 to 4 microns.Through the separation of concentrating and separating device 400, the large quantity of air hardly containing particulate can be discharged with the flow of 980L/min, discharge by the second air-flow; Low discharge air containing PM2.5 particulate, i.e. the first air-flow, dried after entering drying device 500 with the flow of 20L/min, the PM2.5 particulate reduction after growing up is original size.Due to after concentrating and separating unit 400, the air flow rate containing almost whole PM2.5 particulate in air reduces, even if the concentration of PM2.5 particulate increases, reaches the effect that enrichment is concentrated.First air pump 610 makes the first air-flow from drying device 500 enter the exposure chamber 620 of mouth and nose exposing device 600, and the animal be placed in exposure chamber 620 absorbs.

fig. 2 is the schematic partial structurtes cut-open view of the PM2.5 online enrichment method mouth and nose exposure system according to the utility model embodiment; Fig. 3 is the schematic partial enlarged view that Fig. 2 shows A place.As Fig. 2 and Fig. 3 shows, the impact cutter 100 in the utility model embodiment can comprise impact cutter shell 110, have the resistance worm gauze cover 120 of gauze, first jet plate 130, first entrapment plate 140, second nozzle plate 150 and the second entrapment plate 160.Impact cutter 100 shell and there is top stream import and bottom airflow outlet.Resistance worm gauze cover 120 is installed on the top stream import impacting cutter 100 shell, original air can be entered by the gauze of resistance worm gauze cover and impact in cutter 100 shell, and resistance worm gauze cover can prevent insect and the material such as blade of grass, willow catkins flying in the air are inhaled in impact cutter 100 shell and block gas circuit.First jet plate 130, first entrapment plate 140, second nozzle plate 150 and the second entrapment plate 160 all have one or more aperture, and are arranged to parallel interval successively from the top down in impact cutter shell 110.

in the utility model embodiment, the course of work of impacting cutter 100 can be: original air enters when impacting cutter 100 and tackled the impurity in air by the gauze hindering worm gauze cover 120.Then from the multiple apertures ejection of first jet plate 130, the particle that equivalent aerodynamic diameter is greater than 10 μm is trapped on the first entrapment plate 140.Air-flow moves on and from the multiple apertures ejection of second nozzle plate 150, and the particle that equivalent aerodynamic diameter is greater than 2.5 μm is trapped on the second entrapment plate 160.All the other air-flows flow out from bottom airflow outlet and impact cutter 100, to enter water bath device 200.In alternate embodiment more of the present utility model, this impact cutter 100 also can only include a nozzle plate and an entrapment plate.Certainly, in other alternate embodiment, in this impact cutter 100, the quantity of nozzle plate and entrapment plate can be respectively more than three or three.

in embodiments more of the present utility model, refrigerating plant 300 can comprise one or more freezing unit 310, concentrating and separating device 400 can comprise one or more concentrating and separating unit, be configured to respectively receive the air-flow from a freezing unit 310, to improve the efficiency of PM2.5 online enrichment method mouth and nose exposure system.Each freezing unit 310 can comprise outer tube 311 and in outer tube 311 extend in pipe 312, the two ends of interior pipe 312 are communicated with a concentrating and separating unit with water bath device 200 respectively, and the passage limited between outer tube 311 inwall and interior pipe 312 outer wall is for passing the flowing of cold medium.Further, the refrigerating plant 300 of the PM2.5 online enrichment method mouth and nose exposure system of the utility model embodiment has a total refrigeration unit 320, and the cold medium of biography that refrigeration unit 320 is configured to flowing into one or more freezing unit 310 provides cold.When the quantity of freezing unit 310 is multiple, passes cold medium and can split into multichannel, to flow through each freezing unit 310 simultaneously, after the air-flow cooling in internal pipe 312, flow back to refrigeration unit 320 and be cooled.Alternatively, pass cold medium and also can be a road, after flowing through multiple freezing unit 310 successively, after namely cooling successively the air-flow in pipe in each 312, flowing back to, refrigeration unit 320 is cooled.Pass cold medium and can be salt solution, anti freezing solution or other solidifying points lower than the solution etc. of-10 DEG C.In the accompanying drawing of the utility model embodiment, the pipeline between refrigeration unit 320 and each freezing unit 310 is not shown.

in embodiments more of the present utility model, in order to ensure the refrigerating effect of freezing unit 310, the periphery wall of the outer tube 311 of each freezing unit 310 can arrange heat-insulation layer 313.

in embodiments more of the present utility model, as shown in Figure 2, water bath device 200 can comprise water bath 210 and heating arrangement 220.Water bath 210 its there is top cover 211.Each freezing unit 310 is installed on top cover 211 vertically, and the interior pipe 320 of each freezing unit 300 is communicated with the internal cavities of water bath 210.Heating arrangement 220 is configured to the water in heating water bath cabinet 210.Heating arrangement 220 can be electrically heated rod, is arranged in water bath 210.

in embodiments more of the present utility model, each concentrating and separating unit can comprise one or more Virtual cropping device 410; Each Virtual cropping device 410 has airflow inlet, the first air stream outlet and the second air stream outlet.When the quantity of Virtual cropping device 410 is multiple, the first air stream outlet being in the Virtual cropping device of upstream in two often adjacent Virtual cropping devices is communicated with the airflow inlet of another Virtual cropping device, that is, in multiple Virtual cropping device, the first air stream outlet of each Virtual cropping device is communicated with the airflow inlet of the Virtual cropping device being adjacent to its downstream.

as shown in Figure 3, each Virtual cropping device 410 can comprise housing 411, first jet 412 and second nozzle 413.Be limited with accommodation cavity in housing 411, housing 411 offer the second air stream outlet.First jet 412 stretches into accommodation cavity, and its one end is airflow inlet, and the gas channel that limits of at least part of pipeline section of first jet 412 reduces gradually along the direction of air flow direction in it.Cavity is held in being positioned at least partly of second nozzle 413, and with first jet 412 coaxial spaced arrange, one end away from first jet 412 of second nozzle 413 is the first air stream outlet, and the gas channel that limits of at least part of pipeline section of second nozzle 413 expands gradually along the direction of air flow direction in it.

the course of work of each Virtual cropping device 410 can be: after air-flow enters each Virtual cropping device 410, and the larger particulate of equivalent aerodynamic diameter can enter in second nozzle 413 along with the first air-flow due to inertia.Airspace again owing to reserving between the outlet of first jet 412 and the entrance of second nozzle 413, the second air-flow and the less particulate of its equivalent aerodynamic diameter carried flow out from this airspace.

in embodiments more of the present utility model, for the ease of the discharge of the moisture of the gathering in the housing of each Virtual cropping device 410, housing 411 also offers freeing port, freeing port can install a drainpipe 414.

in embodiments more of the present utility model, each concentrating and separating unit can be arranged on the top of a corresponding freezing unit 310.The airflow inlet of each concentrating and separating unit and the interior pipe 312 of a freezing unit 310 are coaxially arranged, and are fixedly connected with the upper end open of this interior pipe 312.Further, freezing unit 310 and concentrating and separating unit can be 5.Concentrating and separating device 400 also comprises five in one gatherer 420, and five in one gatherer 420 has five gatherer imports be communicated with the first air stream outlet of a concentrating and separating unit respectively and exports for the gatherer of discharging the first air-flow with one.Concentrating and separating device 400 also can comprise All-in-One gatherer 430, and this All-in-One gatherer 430 has multiple gatherer import of being communicated with the second air stream outlet of a Virtual cropping device 410 respectively and exports for the gatherer of discharging the second air-flow with one.

fig. 4 is the schematic cross sectional views of exposure chamber in the PM2.5 online enrichment method mouth and nose exposure system according to the utility model embodiment.As shown in Figure 4, exposure chamber 620 comprises: the inner core 621 of coaxial setting and urceolus 622, multiple animal holder 626 and multiple connecting pipe 625.Inner core 621 perisporium offers multilayer hole.The perisporium of urceolus 622 offers multilayer mounting hole, and a hole of each mounting hole of urceolus 622 and inner core 621 is coaxially arranged.The top of inner core 621 and urceolus 622 is provided with upper end cover 623, and the middle part that upper end is somebody's turn to do offers central hole, utilizes pipeline to be communicated with inner core 621 via central hole to make the first air pump 610.The bottom of inner core 621 and urceolus 622 is provided with bottom end cover 624, and bottom end cover 624 offers the spaced air hole of multiple circumferential direction along bottom end cover 624, air hole 624 is communicated with the space between inner core 621 and urceolus 622.For placing an animal in each animal holder 626, as experimental mouse.Each animal holder 626 can be installed on a mounting hole of urceolus 622, and each animal holder 626 has the opening be communicated with urceolus 622.Each connecting pipe 625 is coaxially arranged with a mounting hole of urceolus 622, and two ends stretch into a hole of inner core 621 and the opening of an animal holder 626 respectively, to be communicated with inner core 621 and an animal holder 626.And, the overall diameter of each connecting pipe 625 is less than the diameter of the opening of each animal holder 626, the air-flow of breathing out to allow animal flows out to the space between inner core 621 and urceolus 622 via the gap between connecting pipe 625 and the opening periphery of animal holder 626, and the air hole eventually passed through on bottom end cover 624 flows out the waste gas recovery treatment facility that exposure chamber 620 enters mouth and nose exposing device 600.

The above is only preferred implementation of the present utility model; should be understood that; for those skilled in the art, under the prerequisite not departing from the utility model principle, any improvements and modifications made also should be considered as protection domain of the present utility model.

Claims (10)

1. a PM2.5 online enrichment method mouth and nose exposure system, is characterized in that, comprising:

Impact cutter, be configured to admission of air air-flow, and remove the particle that in described air draught, aerodynamics equivalent diameter is greater than 2.5 μm at least in part;

Water bath device, is configured to receive the air-flow from described impact cutter, mixes to make the air-flow from described impact cutter with the water vapor that described water bath device produces;

Refrigerating plant, is configured to the mixed airflow that receives from described water bath device and reduces the temperature of described mixed airflow, being more than or equal to 2.5 μm to make the equivalent aerodynamic diameter of at least part of particle in described mixed airflow rise to;

Concentrating and separating device, be configured to receive the air-flow from described refrigerating plant, and the airflow diversion from described refrigerating plant is become the first air-flow and the second air-flow, and make in the air-flow from described refrigerating plant, equivalent aerodynamic diameter rises to all particulates being more than or equal to 2.5 μm is partly or entirely arranged in described first air-flow;

Drying device, is configured to receive and dry described first air-flow from described concentrating and separating device; With

Mouth and nose exposing device, it has the first air pump and exposure chamber, and described first air pump is configured to make described first air-flow in described drying device enter described exposure chamber; And

Second air pump, is configured to aspirate described second air-flow from described concentrating and separating device.

2. PM2.5 according to claim 1 online enrichment method mouth and nose exposure system, characterized by further comprising:

First flow controller, is arranged on the air inlet pipeline of described first air pump, flows through described first air pump to make described first air-flow with first flow; With

Second amount controller, is arranged on the air inlet pipeline of described second air pump, and to make described second air-flow flow through described second air pump with the second flow, and the ratio of described second flow and described first flow is 40 to 60.

3. PM2.5 according to claim 1 online enrichment method mouth and nose exposure system, is characterized in that

Be limited with for the first passage by described first air-flow with for the second channel by dry gas in described drying device, to make described dry gas, drying carried out to described first air-flow; And

The air inlet pipeline of described second channel is provided with the 3rd flow controller, described 3rd flow controller is configured to the flow regulating described dry gas, has predetermined humidity value to make described first air-flow entering described mouth and nose exposing device.

4. PM2.5 according to claim 1 online enrichment method mouth and nose exposure system, is characterized in that

Described refrigerating plant comprises one or more freezing unit;

Described concentrating and separating device comprises one or more concentrating and separating unit, is configured to respectively receive the air-flow from a described freezing unit.

5. PM2.5 according to claim 4 online enrichment method mouth and nose exposure system, is characterized in that

Each described freezing unit comprises outer tube and pipe in extending in described outer tube, the two ends of described interior pipe are communicated with a described concentrating and separating unit with described water bath device respectively, and the passage limited between described outer tube wall and described outer wall of inner tube is for passing the flowing of cold medium; And

Described refrigerating plant also comprises refrigeration unit, and the cold medium of described biography be configured to flowing into described one or more freezing unit provides cold.

6. PM2.5 according to claim 5 online enrichment method mouth and nose exposure system, is characterized in that, described water bath device comprises:

Water bath, it has top cover, and each described freezing unit is installed on described top cover vertically; With

Heating arrangement, is configured to heat the water in described water bath.

7. PM2.5 according to claim 4 online enrichment method mouth and nose exposure system, is characterized in that

Each described concentrating and separating unit comprises one or more Virtual cropping device, each described Virtual cropping utensil has airflow inlet, the first air stream outlet and the second air stream outlet, and in described multiple Virtual cropping device, the first air stream outlet of each described Virtual cropping device is communicated with the airflow inlet of the described Virtual cropping device being adjacent to its downstream.

8. PM2.5 according to claim 7 online enrichment method mouth and nose exposure system, is characterized in that, each described Virtual cropping device comprises:

Housing, is limited with accommodation cavity in it, it offers described second air stream outlet;

First jet, stretches into described accommodation cavity, and its one end is described airflow inlet, and the gas channel that limits of at least part of pipeline section of described first jet reduces gradually along the direction of air flow direction in it; With

Second nozzle, it is positioned at described accommodation cavity at least partly, and with described first jet coaxial spaced arrange, one end away from described first jet of described second nozzle is described first air stream outlet, and the gas channel that limits of at least part of pipeline section of described second nozzle expands gradually along the direction of air flow direction in it.

9. PM2.5 according to claim 8 online enrichment method mouth and nose exposure system, is characterized in that

Each described Virtual cropping device also comprises drainpipe, so that the water in described housing is discharged described housing.

10. PM2.5 according to claim 1 online enrichment method mouth and nose exposure system, is characterized in that, described exposure chamber comprises:

Inner core, its perisporium offers multilayer hole;

Urceolus, is coaxially arranged with described inner core, the perisporium of described urceolus offers multilayer mounting hole, and a hole of each mounting hole of described urceolus and described inner core is coaxially arranged;

Upper end cover, is installed on the top of described inner core and described urceolus, offers central hole in the middle part of it, utilizes pipeline to be communicated with described inner core via described central hole to make described first air pump;

Bottom end cover, is installed on the bottom of described inner core and described urceolus, and it offers the spaced air hole of multiple circumferential direction along described bottom end cover, each described air hole is communicated with the space between described inner core and described urceolus;

Multiple animal holder, each described animal holder is installed on a described mounting hole of described urceolus, and each described animal holder has the opening be communicated with described urceolus;

Multiple connecting pipe, a mounting hole of each described connecting pipe and described urceolus is coaxially arranged, two ends stretch into a hole of described inner core and the opening of a described animal holder respectively, to be communicated with described inner core and a described animal holder, and the overall diameter of each described connecting pipe is less than the diameter of the opening of each described animal holder.