CN113219096B - Embedded indoor air detector - Google Patents
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- CN113219096B CN113219096B CN202110495948.9A CN202110495948A CN113219096B CN 113219096 B CN113219096 B CN 113219096B CN 202110495948 A CN202110495948 A CN 202110495948A CN 113219096 B CN113219096 B CN 113219096B
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- 238000004458 analytical method Methods 0.000 claims abstract description 34
- 239000013618 particulate matter Substances 0.000 claims abstract description 22
- 239000007789 gas Substances 0.000 claims description 38
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 27
- 239000002245 particle Substances 0.000 claims description 15
- 229910052757 nitrogen Inorganic materials 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 12
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 10
- 239000001301 oxygen Substances 0.000 claims description 10
- 229910052760 oxygen Inorganic materials 0.000 claims description 10
- 230000008569 process Effects 0.000 claims description 9
- 239000003638 chemical reducing agent Substances 0.000 claims description 6
- QNRATNLHPGXHMA-XZHTYLCXSA-N (r)-(6-ethoxyquinolin-4-yl)-[(2s,4s,5r)-5-ethyl-1-azabicyclo[2.2.2]octan-2-yl]methanol;hydrochloride Chemical compound Cl.C([C@H]([C@H](C1)CC)C2)CN1[C@@H]2[C@H](O)C1=CC=NC2=CC=C(OCC)C=C21 QNRATNLHPGXHMA-XZHTYLCXSA-N 0.000 claims description 2
- 230000008676 import Effects 0.000 abstract description 24
- 230000008878 coupling Effects 0.000 abstract description 4
- 238000010168 coupling process Methods 0.000 abstract description 4
- 238000005859 coupling reaction Methods 0.000 abstract description 4
- 238000000605 extraction Methods 0.000 abstract description 3
- 239000003570 air Substances 0.000 description 62
- 238000001514 detection method Methods 0.000 description 18
- 239000003344 environmental pollutant Substances 0.000 description 13
- 231100000719 pollutant Toxicity 0.000 description 13
- 230000000087 stabilizing effect Effects 0.000 description 13
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 9
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 7
- 238000000926 separation method Methods 0.000 description 6
- 230000035945 sensitivity Effects 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- IVSZLXZYQVIEFR-UHFFFAOYSA-N 1,3-Dimethylbenzene Natural products CC1=CC=CC(C)=C1 IVSZLXZYQVIEFR-UHFFFAOYSA-N 0.000 description 4
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical group CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 4
- 230000009471 action Effects 0.000 description 4
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 3
- 239000000809 air pollutant Substances 0.000 description 3
- 231100001243 air pollutant Toxicity 0.000 description 3
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000012372 quality testing Methods 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 239000012080 ambient air Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001555 benzenes Chemical class 0.000 description 1
- 238000004587 chromatography analysis Methods 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
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- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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- 238000003912 environmental pollution Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
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- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/04—Preparation or injection of sample to be analysed
- G01N30/06—Preparation
- G01N30/08—Preparation using an enricher
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/04—Preparation or injection of sample to be analysed
- G01N30/06—Preparation
- G01N30/14—Preparation by elimination of some components
-
- 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
- G01N15/075—Investigating concentration of particle suspensions by optical means
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
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Abstract
The invention discloses an embedded indoor air detector, which comprises a fan, a cyclone shell, a spiral blade, a first branch pipe, a second branch pipe, a particulate matter analysis component, a chromatographic column and a shell, wherein the shell is provided with an external interface: import and first export, the fan, the whirlwind shell, the spiral leaf, first branch pipe, the second branch pipe, the particulate matter analysis subassembly, the chromatographic column all sets up in the casing, the import is connected to the fan extraction opening, whirlwind shell one end is connected to the fan blast orifice, set up the spiral leaf in the whirlwind shell, the whirlwind shell other end sets up first branch pipe respectively in the lateral wall position and sets up the second branch pipe at central position, first branch union coupling is to particulate matter analysis subassembly feed inlet, the second branch union coupling is to the chromatographic column feed inlet, the discharge gate of particulate matter analysis subassembly and chromatographic column all is connected to first export.
Description
Technical Field
The invention relates to the technical field of air detection, in particular to an embedded indoor air detector.
Background
With the progress of industrialization and urbanization, environmental pollution is becoming more serious, and on the contrary, people are more and more conscious of the environment, and improvements are being sought for sanitary and health conditions that can be improved in life.
Indoor air as a place which needs a lot of time for one person to work and live is concerned more and more about the quality of indoor air, according to relevant indoor air environmental standards, indoor air pollutants mainly comprise particle suspended matters and TVOC (total volatile organic compounds), wherein formaldehyde is a substance which is generated in a large amount in decoration, and benzene compounds and the like are common, and the substances are harmful to human bodies, so the concentration of the substances should be limited, and for scenes which seek high-quality indoor air, the air detection should be restricted by a numerical value higher than an applicable standard, and the air detection is a necessary step.
Among the prior art, particulate matter and TVOC's detection is separately gone on often, needs specific control condition sample at every turn, and is comparatively troublesome, and is higher to the identification accuracy of pollutant, sensitivity requirement, then just needs the examination instrument of higher accuracy to examine and determine, promotes examination cost, has the condition that can not examine out even to some low-content components in the organic pollutant, is unfavorable for the user to control indoor air quality.
Disclosure of Invention
The invention aims to provide an embedded indoor air detector to solve the problems in the background technology.
In order to solve the technical problems, the invention provides the following technical scheme:
the utility model provides an embedded indoor air detector, includes fan, cyclone shell, spiral leaf, first branch pipe, second branch pipe, particulate matter analysis subassembly, chromatographic column and casing, and the casing leaves external interface: import and first export, the fan, the whirlwind shell, the spiral leaf, first branch pipe, the second branch pipe, particulate matter analysis subassembly, the chromatographic column all sets up in the casing, the import is connected to the fan extraction opening, the whirlwind shell one end is connected to the fan tuyere, set up the spiral leaf in the whirlwind shell, the whirlwind shell other end sets up first branch pipe respectively in the lateral wall position and sets up the second branch pipe at central position, first branch union coupling is to particulate matter analysis subassembly feed inlet, the second branch union coupling is to the chromatographic column feed inlet, the discharge gate of particulate matter analysis subassembly and chromatographic column all is connected to first export.
The method comprises the steps that gas to be detected enters a detector from an inlet, a cyclone shell and spiral blades provide a spiral flow channel for the gas flow, centrifugal separation is carried out in the spiral advancing process of the gas flow, a large proportion of particulate matters contained in the gas flow are attached to the outer wall of the cyclone shell, gas components are concentrated at the middle position, therefore, the particulate matters in the air are enriched and concentrated in a first branch pipe and go to a particulate matter analysis assembly for analyzing air PM, clean gas goes to a chromatographic column from a second branch pipe at the middle position for analyzing gas molecular components, pollutants such as formaldehyde, benzene, TVOC and the like contained in the air are identified, and air pollutants are comprehensively detected;
and the analysis of the chromatographic column only needs to obtain the gas flow in the second branch pipe independently, because the cyclone shell and the spiral blade can only separate particles, and the gas component proportion cannot be different on the first branch pipe and the second branch pipe.
Further, the particulate matter analysis component comprises a flow stabilizing shell, a laser and a light sensor, one end of the flow stabilizing shell is connected with the first branch pipe, the laser is arranged on the inner wall of the flow stabilizing shell, the laser emits laser beams towards the central line of the airflow at an included angle, and the light sensor is also arranged on the inner wall of the flow stabilizing shell. The light sensor receives scattered light, the gas after cyclone separation concentration enters the flow stabilizing shell, the flow stabilizing shell provides an open stable laminar flow environment for gas flow, the laser emits laser with specific frequency, if more particulate matters exist in the gas, the scattering of the light is more obvious, the light sensor judges the content of the particulate matters in the gas according to the received scattered light with different intensities, the specific corresponding relation can be calibrated, the precision requirement of the household occasion is not high, and the particulate matters are concentrated by the structure, so the detection sensitivity of the particulate matters is improved, and the problem of certain refraction detection precision can be solved.
Further, the air detector further comprises a concentration pipe, the concentration pipe is arranged between the second branch pipe and the chromatograph and is used for concentrating components except oxygen and nitrogen from the gas components, and the concentrated components are led to the chromatographic column. The gas that the concentrator pipe obtained from second branch pipe tip divides into two strands, and one strand is a large amount of oxygen, nitrogen gas, directly discharges to first export as useless thing, and another strand of concentrated component leads to the chromatographic column and analyzes, and the component after the concentration has higher crest display in the chromatographic column to improve the detection rate, the material promotion detection precision of higher content to some low-content components.
Further, the concentration pipe includes square pipe, first electrode piece, second electrode piece and flow distribution plate, air detector still includes square circle reducing pipe, square pipe one end is passed through square circle reducing pipe and is connected the second branch pipe, the other end of square pipe passes through the flow distribution plate and separates for net flow branch road and concentrated branch road, net flow branch road is connected to first export, concentrated branch road is connected to the chromatographic column, square pipe connection square circle reducing pipe's one end is as the sprue, first electrode piece, the second electrode piece sets up respectively on the sprue wall, first electrode piece, the face-to-face setting of second electrode piece, first electrode piece, the electric charge on the second electrode piece is opposite, the electric charge volume on the first electrode piece is higher than the second electrode piece, first electrode piece sets up on the wall adjacent with concentrated branch road. The first electrode plate is used for accumulating a large amount of positive charges, the second electrode plate opposite to the first electrode plate is used for accumulating a small amount of negative charges, a large amount of nitrogen and oxygen molecules are in a gas flowing in the main flow channel, the two molecules are nonpolar, most TVOC components such as formaldehyde, m/o-xylene and the like are polar molecules, the polarity of the molecules is different according to different molecular structures, the polarity of the molecules is reflected that the centers of the positive and negative charges in the molecules are not coincident, the larger the polarity is, the larger the non-coincident degree is, the farther the center distance is, when the gas flows along the main flow channel, the positive and negative heads are reversed to adjust the posture, the head part of the negative charges faces the first electrode plate, the head part of the positive charges faces the second electrode plate, after the posture adjustment is finished, the polar molecules always keep the posture to flow forwards, when the gas moves forwards, if yawing occurs, the polar molecules moving to the position near the first electrode plate are prevented from being far away from the first electrode plate again, the polar molecules are bound to the polar molecules equivalent to the first electrode plate, under the condition that the polar molecules are arranged in the main flow channel according to the position where the polarity of the main flow channel, the polar molecules are larger, and the nitrogen molecules are concentrated to the position near the position of the main flow channel, the main flow, the nitrogen molecules are concentrated to the position where the polar molecules.
Furthermore, the concentration pipe also comprises a third electrode plate, the third electrode plate is arranged on the wall surface of the main flow channel, the third electrode plate and the first electrode plate are arranged in a face-to-face mode, the third electrode plate is provided with electric charges with the same electric property as the first electrode plate, and the electric charge amount of the third electrode plate is the same as that of the second electrode plate. The first electrode plate and the second electrode plate already set the polar molecules to be in a positive posture, and when the polar molecules flow forwards to the third electrode plate, as long as the posture that the negative charge end faces the first electrode plate is maintained, the positive charge end faces the third electrode plate, like polarities repel each other, the polar molecules are extruded to the first electrode plate, so that the polar molecules are more attached to the vicinity of the first electrode plate, and the enrichment effect at the position of the separation plate is more remarkable.
Furthermore, the third electrode plate and the second electrode plate are alternately arranged. When polar molecules flow between the first electrode plate and the third electrode plate along the main flow channel, the yaw flow close to the first electrode plate can be realized only by keeping the negative charge end towards the first electrode plate and the positive charge end towards the third electrode plate, when the electrode plates on two sides of the main flow channel are the same-polarity electrode plates, the posture is maintained only by means of different electric charge amounts of the two electrode plates so as to generate attraction and repulsion forces with different sizes, once the posture changes and the polar molecules exceed the turning of ninety degrees, the binding force of the first electrode plate on the polar molecules is much smaller, and after the second electrode plate and the third electrode plates are alternately arranged, the posture of the polar molecules can be kept all the time, the third electrode plate is used for yaw, and the second electrode plate is used for posture keeping.
Furthermore, a plurality of spoilers are further arranged on the inner wall of the main flow channel, the spoilers are transversely arranged in the main flow channel, and the cross sections of the spoilers are rhombic. The air flow is slightly disturbed by the spoiler, which "squeezes out" the nitrogen and oxygen molecules near the location near the first electrode sheet to a location away from the first electrode sheet to allow more polar molecules to be accommodated near the first electrode sheet.
Furthermore, the air detector also comprises a second outlet, and a branch pipe is arranged on a pipeline connecting the net flow branch with the first outlet and is connected to the second outlet. The branch control is realized by switching the valves, and pure oxygen and nitrogen are discharged from the net flow branch and can directly flow back to the room.
Furthermore, the air detector also comprises a processor, wherein the processor processes signals of the chromatographic column and the particulate analysis component, and the processor is provided with a display. The display displays the indoor air quality.
Furthermore, the air detector is used in combination with a fresh air system, the processor and the display thereof are arranged at a control console of the fresh air system, and the inlet, the first outlet and the second outlet use an air inlet and an air outlet of the fresh air system. The new trend system is as indoor ventilation, and its business turn over wind gap can enlarge detection range greatly as air detector's sample position, promotes and detects the accuracy, has four wind gaps on the new trend system basis: outer import, outer export, interior import, interior export, outer import and interior exit linkage, interior import and outer exit linkage, when using this structure embedding new trend system, let the import connect outer import respectively, interior import, interior export, let first export connect outer export respectively, interior import, interior export, let export in the third exit linkage, thus, not only can be respectively from interior import, interior exit carries out the air sample, can also want to send into indoor ambient air to new trend system and carry out the quality testing, PM class pollutant can be got rid of to new trend system generally speaking, and then mostly do not possess the removal ability to TVOC, so, under the rare circumstances, outdoor formaldehyde, when pollutants such as TVOC are more, can not propose the external air inlet mode of opening new trend system, and only carry out the room air inner loop.
Compared with the prior art, the invention has the following beneficial effects: according to the invention, particle pollutants are separated by the rotating air flow, the particle pollutants are introduced into the particle analysis assembly for analysis after the concentration of the particles is improved, the analysis sensitivity is improved, the PM concentration is judged by laser irradiation gas through the scattered light intensity, the process of high-efficiency and quick detection is completed, the TVOC pollutants such as formaldehyde, benzene and the like do not need to participate in liquid, the TVOC pollutants are arrayed and flow in a square tube through molecular polarities, the polar molecules are maintained in a polar posture and are deflected by the second electrode plate and the third electrode plate alternately, a large number of polar molecules flow backwards from a concentration branch close to the first electrode plate to enter a chromatographic column, the chromatographic analysis sensitivity of the molecular pollutants is improved, the detection rate of low-content components is improved, and the intelligent degree of air quality detection home furnishing is improved by combining with a fresh air system.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic structural view of a particulate analysis assembly of the present invention;
FIG. 3 is a schematic axial view of a concentrator tube according to the present invention;
FIG. 4 is view A of FIG. 3;
FIG. 5 is view B-B of FIG. 3;
FIG. 6 is a schematic view of the connection of the end of a concentrator tube of the present invention to a first outlet and a second outlet;
FIG. 7 is a schematic view of the present invention in use in conjunction with a fresh air system in a room;
FIG. 8 is a schematic view of the nozzle connection of the present invention when used in conjunction with a fresh air system;
in the figure: the device comprises a fan 1, a cyclone shell 21, a spiral blade 22, a first branch pipe 31, a second branch pipe 32, a particulate matter analysis component 4, a flow stabilizing shell 41, a laser 42, a light sensor 43, a diameter-changing pipe 5, a concentration pipe 6, a square pipe 61, a main flow channel 611, a clean flow branch 612, a concentration branch 613, a first electrode plate 62, a second electrode plate 63, a third electrode plate 64, a spoiler 65, a flow dividing plate 66, a chromatographic column 7, a machine shell 8, an inlet 81, an inlet 82, a first outlet 83, a second outlet 9 and a processor.
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 derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-8, the present invention provides the following technical solutions:
the utility model provides an embedded indoor air detector, includes fan 1, cyclone shell 21, spiral leaf 22, first branch pipe 31, second branch pipe 32, particulate matter analysis subassembly 4, chromatographic column 7 and casing 8, and casing 8 leaves external interface: import 81 and first export 82, fan 1, cyclone shell 21, spiral leaf 22, first branch pipe 31, second branch pipe 32, particulate matter analysis subassembly 4, chromatographic column 7 all sets up in casing 8, import 81 is connected to 1 extraction opening of fan, 1 tuyere of fan connects cyclone shell 21 one end, set up spiral leaf 22 in the cyclone shell 21, the cyclone shell 21 other end sets up first branch pipe 31 and sets up second branch pipe 32 at central position in the lateral wall position respectively, first branch pipe 31 is connected to particulate matter analysis subassembly 4 feed inlet, second branch pipe 32 is connected to chromatographic column 7 feed inlet, the discharge gate of particulate matter analysis subassembly 4 and chromatographic column 7 all is connected to first export 82.
As shown in fig. 1, a gas to be detected enters the detector from an inlet 81, a cyclone shell 21 and spiral blades 22 provide a spiral flow channel for the gas flow, centrifugal separation is performed during the spiral advancing process of the gas flow, a large proportion of particulate matters contained in the gas flow are attached to the outer wall of the cyclone shell 21, and gas components are concentrated at the middle position, so that the particulate matters in the air are enriched and concentrated in a first branch pipe 31 and go to a particulate matter analysis component 4 for analyzing air PM, and clean gas goes to a chromatographic column 7 from a second branch pipe 32 at the middle position for analyzing gas molecular components, so that pollutants such as formaldehyde, benzene, TVOC and the like contained in the air are identified, and air pollutants are comprehensively detected, it should be noted that the gas needs to pass through a flow meter before being divided into two streams to obtain the PM content of the gas integrally entering the detector in combination with data of the particulate matter analysis component 4, cyclone separation can only separate the particulate matters with a large proportion, and can not allow all the particulate matters to enter the first branch pipe 31, and part of the particulate matters enter the second branch pipe 32, so that the numerical value measured by the particulate matters 4 is multiplied by a factor of about 1.05 to be used as the total volume of the actual particle size of the cyclone shell 21, and the actual particle size of the actual particle is calibrated according to the actual measurement;
the analysis of the chromatographic column 7 only needs to obtain the gas flow rate in the second branch pipe 32 alone, because the cyclone casing 21 and the helical blades 22 can only separate the particles, and the gas component ratio cannot be different between the first branch pipe 31 and the second branch pipe 32.
The particulate matter analysis assembly 4 comprises a flow stabilizing shell 41, a laser 42 and a light sensor 43, one end of the flow stabilizing shell 41 is connected with the first branch pipe 31, the laser 42 is arranged on the inner wall of the flow stabilizing shell 41, the laser 42 emits laser beams towards the central line of airflow at an included angle, and the light sensor 43 is also arranged on the inner wall of the flow stabilizing shell 41. The light sensor 43 receives scattered light, as shown in fig. 2, the gas after cyclone separation and concentration enters the flow stabilizing shell 41, the flow stabilizing shell 41 provides an open stable laminar flow environment for gas flow, the laser 42 emits laser with a specific frequency, if the gas has more particulate matters, the scattering of light is more remarkable, the light sensor 43 determines the content of the particulate matters in the gas according to the received scattered light with different intensities, the specific correspondence can be calibrated, the precision requirement of the household occasion is not high, and the particulate matters have been concentrated by the structure, so the detection sensitivity of the particulate matters is improved, and a certain refraction detection precision problem can be made up.
The air detector further comprises a concentration tube 6, the concentration tube 6 is arranged between the second branch tube 32 and the chromatograph 7, the concentration tube 6 is used for concentrating components except oxygen and nitrogen from the gas components, and the concentrated components are led to the chromatographic column 7. As shown in fig. 1 and 3, the gas obtained from the end of the second branch pipe 32 by the concentration pipe 6 is divided into two streams, one stream is a large amount of oxygen and nitrogen, and is directly discharged to the first outlet 82 as useless substances, the other stream of concentrated components is led to the chromatographic column 7 for analysis, and the concentrated components have higher peak display in the chromatographic column 7, so that the detection rate and the detection accuracy of substances with higher content are improved for some low-content components.
The concentration pipe 6 comprises a square pipe 61, a first electrode plate 62, a second electrode plate 63 and a flow distribution plate 66, the air detector further comprises a square-round reducer pipe 5, one end of the square pipe 61 is connected with the second branch pipe 32 through the square-round reducer pipe 5, the other end of the square pipe 61 is divided into a net flow branch 612 and a concentration branch 613 through the flow distribution plate 66, the net flow branch 612 is connected to the first outlet 82, the concentration branch 613 is connected to the chromatographic column 7, the square pipe 61 is connected with one end of the square-round reducer pipe 5 to serve as a main flow channel 611, the first electrode plate 62 and the second electrode plate 63 are respectively arranged on the wall surface of the main flow channel 611, the first electrode plate 62 and the second electrode plate 63 are arranged face to face, the electric charges on the first electrode plate 62 and the second electrode plate 63 are opposite, the electric charge on the first electrode plate 62 is higher than that on the second electrode plate 63, and the first electrode plate 62 is arranged on the wall surface adjacent to the concentration branch 613. As shown in fig. 3, a large amount of positive charges are accumulated on the first electrode plate 62, a small amount of negative charges are accumulated on the second electrode plate 63 opposite thereto, and a large amount of nitrogen and oxygen molecules, both of which are nonpolar, like formaldehyde, meta/ortho-xylene, most TVOC components, are polar molecules, the polarity of the molecule is reflected as the misalignment of the positive and negative charge centers in the molecule according to the difference of the molecular structure, the larger the polarity is, the larger the misalignment degree is, the farther the center distance is, as shown in FIG. 3, when the gas flows along the main flow channel 611, under the action of the first electrode plate 62 and the second electrode plate 63, the positive and negative heads reversely rotate to adjust the posture, the negative charge head faces the first electrode plate 62, the positive charge head faces the second electrode plate 63, after the posture adjustment is finished, the positive charge head always keeps the posture to flow forwards, and when the positive charge head moves forwards, if yawing occurs, the attraction of the first electrode pad 62 to polar molecules moving near the first electrode pad 62 prevents them from moving further away from the first electrode pad 62, which is equivalent to the first electrode pad 62 binding polar molecules, in case of a longer flow path, the polar molecules are arranged in the main channel 611 according to polarity, the polar molecules are arranged at the position close to the first electrode plate 62 with larger polarity, because the positive charge end of the polar molecules faces to the central line of the main channel 611, therefore, the negative molecular charge end with smaller polarity in the main channel 611 is attracted, and when the water flows forwards to the position of the diversion plate 66, a large number of polar molecules attached near the first electrode sheet 62 enter the concentration branch 613, the rest of the nitrogen and oxygen molecules flow away from the net flow branch 612, and the concentration process of the pollutant components is completed.
The concentration pipe 6 further comprises a third electrode plate 64, the third electrode plate 64 is arranged on the wall surface of the main flow channel 611, the third electrode plate 64 is arranged opposite to the first electrode plate 62, the third electrode plate 64 is provided with electric charges with the same electric property as the first electrode plate 62, and the electric charges on the third electrode plate 64 are the same as the electric charges on the second electrode plate 63. As shown in fig. 3 and 4, when the polar molecules are already shifted to the positive posture by the first electrode sheet 62 and the second electrode sheet 63 and flow forward to the third electrode sheet 64, as long as the posture that the negative end faces the first electrode sheet 62 is maintained, the polar molecules are pushed toward the first electrode sheet 62 due to the repulsion of the positive ends facing the third electrode sheet 64, so that the polar molecules are more attached to the vicinity of the first electrode sheet 62, and the enrichment effect is more remarkable at the position of the partition plate 66. Voltage U1 is applied between the second electrode plate 63 and the third electrode plate 64, voltage U2 is applied between the first electrode plate 62 and a metal plate at a remote position, and if U2 is greater than U1, it can be ensured that the charge amount on the first electrode plate 62 is greater than that of the second and third electrode plates.
The third electrode pieces 64 are alternately arranged with the second electrode pieces 63. As shown in fig. 3 and 4, when polar molecules flow between the first electrode sheet 62 and the third electrode sheet 64 along the main flow channel 611, yaw flow approaching the first electrode sheet 62 can be realized only by keeping the negative charge end facing the first electrode sheet 62 and the positive charge end facing the third electrode sheet 64, when the electrode sheets on both sides of the main flow channel 611 are the same polarity electrode sheets, the posture is maintained only by the difference of the charge amount of the two electrode sheets to generate attraction and repulsion forces with different sizes, once the posture changes and the polar molecules are turned over by more than ninety degrees, the binding force of the first electrode sheet 62 to the polar molecules is much smaller, and after the second electrode sheet 63 and the third electrode sheet 64 are alternately arranged, the posture of the polar molecules can be kept all the time, the third electrode sheet 64 serves as yaw, and the second electrode sheet 63 serves as posture keeping.
As shown in 3~5, a plurality of spoilers 65 are further disposed on the inner wall of the main channel 611, the spoilers 65 are transversely disposed in the main channel 611, and the cross section of each spoiler 65 is a diamond shape. As shown in fig. 3 and 4, the air flow is slightly disturbed by the spoiler 65, which "squeezes" the nitrogen and oxygen molecules near the first electrode sheet 62 to a location away from the first electrode sheet 62 to accommodate more polar molecules near the first electrode sheet 62.
As shown in FIG. 6, the air detector further includes a second outlet 83, and the pipeline connecting the net flow branch 612 and the first outlet 82 is branched to connect to the second outlet 83. The branch control is realized by switching valves, and pure oxygen and nitrogen are discharged from the net flow branch 612 and can directly flow back to the room.
The air detector also comprises a processor 9, wherein the processor 9 processes signals of the chromatographic column 7 and the particle analysis component 4, and the processor 9 is provided with a display. The display displays the indoor air quality.
The air detector is used by combining with a fresh air system, the processor 9 and a display thereof are arranged at a control console of the fresh air system, and an inlet 81, a first outlet 82 and a second outlet 83 use an air inlet and an air outlet of the fresh air system. As shown in FIGS. 7 and 8, the fresh air system is used for indoor ventilation, the detection range can be greatly enlarged by using the air inlet and the air outlet as the sampling position of the air detector, the detection accuracy is improved, and four air outlets are arranged on the basis of the fresh air system: outer import, outer export, interior import, interior export, outer import and interior exit linkage, interior import and outer exit linkage, when using this structure embedding new trend system, let import 81 connect outer import respectively, interior import, interior export, let first export 82 connect outer export respectively, interior import, interior export, let third export 83 connect interior export, set up the on-off valve on every pipeline and be used for switching interface connection, so, can not only be respectively from interior import, interior exit carries out the air sample, can also carry out quality testing to the new trend system outside air that wants to send into indoor, new trend system can fall PM class pollutant generally speaking, and it then does not possess the removal ability mostly to get rid of to TVOC, so, under the rare circumstances, outdoor formaldehyde, when pollutants such as TVOC are more, can not suggest the external air inlet mode of opening new trend system, but only carry out the indoor air inner loop.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. An embedded indoor air detector which characterized in that: air detector includes fan (1), whirlwind shell (21), spiral leaf (22), first branch pipe (31), second branch pipe (32), particulate matter analysis subassembly (4), chromatographic column (7) and casing (8), external interface is left in casing (8): the particle analysis device comprises an inlet (81) and a first outlet (82), wherein the fan (1), a cyclone shell (21), a spiral blade (22), a first branch pipe (31), a second branch pipe (32), a particle analysis component (4) and a chromatographic column (7) are arranged in a machine shell (8), a suction opening of the fan (1) is connected with the inlet (81), a blast opening of the fan (1) is connected with one end of the cyclone shell (21), the spiral blade (22) is arranged in the cyclone shell (21), the other end of the cyclone shell (21) is respectively provided with the first branch pipe (31) at the side wall position and the second branch pipe (32) at the central position, the first branch pipe (31) is connected to a feeding hole of the particle analysis component (4), the second branch pipe (32) is connected to a feeding hole of the chromatographic column (7), and the discharge holes of the particle analysis component (4) and the chromatographic column (7) are connected to the first outlet (82);
the air detector further comprises a concentration pipe (6), the concentration pipe (6) is arranged between the second branch pipe (32) and the chromatograph (7), the concentration pipe (6) is used for concentrating components except oxygen and nitrogen from gas components, and the concentrated components are led to the chromatographic column (7);
the air detector comprises a concentration pipe (6), a square pipe (61), a first electrode plate (62), a second electrode plate (63) and a flow distribution plate (66), the air detector further comprises a square-round reducer pipe (5), one end of the square pipe (61) is connected with a second branch pipe (32) through the square-round reducer pipe (5), the other end of the square pipe (61) is divided into a net flow branch (612) and a concentration branch (613) through the flow distribution plate (66), the net flow branch (612) is connected to a first outlet (82), the concentration branch (613) is connected to a chromatographic column (7), one end, connected with the square-round reducer pipe (5), of the square pipe (61) serves as a main flow passage (611), the first electrode plate (62) and the second electrode plate (63) are respectively arranged on the wall surface of the main flow passage (611), the first electrode plate (62) and the second electrode plate (63) are arranged in a face-to-face mode, the charges on the first electrode plate (62) and the second electrode plate (63) are opposite, the charge on the first electrode plate (62) is higher than the second electrode plate (613) which is arranged on the wall surface of the concentration branch;
the concentration pipe (6) further comprises a third electrode plate (64), the third electrode plate (64) is arranged on the wall surface of the main flow channel (611), the third electrode plate (64) and the first electrode plate (62) are arranged in a face-to-face mode, the third electrode plate (64) is provided with electric charges with the same electric property as the first electrode plate (62), and the electric charges on the third electrode plate (64) are the same as the electric charges on the second electrode plate (63);
the third electrode plates (64) and the second electrode plates (63) are alternately arranged.
2. The embedded indoor air detector of claim 1, wherein: particulate matter analysis subassembly (4) are including stationary flow shell (41), laser instrument (42) and light sensor (43), first pillar (31) is connected to stationary flow shell (41) one end, laser instrument (42) set up on stationary flow shell (41) inner wall, and laser instrument (42) are with an contained angle towards air current central line emission laser beam, light sensor (43) also set up on stationary flow shell (41) inner wall.
3. The embedded indoor air detector of claim 1, wherein: the inner wall of the main flow channel (611) is further provided with a plurality of spoilers (65), the spoilers (65) are transversely arranged in the main flow channel (611), and the cross sections of the spoilers (65) are rhombic.
4. The embedded indoor air detector of claim 1, wherein: the air detector further comprises a second outlet (83), and a branch pipe is arranged on a pipeline of the net flow branch (612) connected with the first outlet (82) and connected to the second outlet (83).
5. The embedded indoor air detector of claim 1, wherein: the air detector also comprises a processor (9), the processor (9) processes signals of the chromatographic column (7) and the particulate matter analysis component (4), and the processor (9) is provided with a display.
6. The embedded indoor air detector of claim 5, wherein: the air detector is used by combining with a fresh air system, the processor (9) and the display thereof are arranged at a control console of the fresh air system, and the inlet (81), the first outlet (82) and the second outlet (83) use an air inlet and an air outlet of the fresh air system.
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