CN108692761B - Air quality sampling detector - Google Patents
Air quality sampling detector Download PDFInfo
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- CN108692761B CN108692761B CN201710236424.1A CN201710236424A CN108692761B CN 108692761 B CN108692761 B CN 108692761B CN 201710236424 A CN201710236424 A CN 201710236424A CN 108692761 B CN108692761 B CN 108692761B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2273—Atmospheric sampling
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/24—Suction devices
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Abstract
The invention provides an air quality sampling detector, comprising: casing, air channel, control unit and sampling subassembly, the casing is formed by last casing and lower casing lock, and air channel sets up inside the casing, including air inlet and air outlet, is equipped with detection chamber and sampling chamber between the two, and air outlet department is equipped with the actuating pump, and control unit detects air quality data and shows on display module through the sensor, and sampling subassembly includes sample thief, rotating member and mounting, opens the rotating member on the mounting, installs the sample thief and can gather the air sample, and this detector not only can convenient and fast gather the air sample, still can detect air quality data, guarantees the accuracy of detection data.
Description
Technical Field
The invention relates to an air quality sampling detector which is mainly used for air sampling and air quality data monitoring, and belongs to the technical field of atmospheric environment monitoring.
Background
In recent years, the influence of continuously deteriorated air environment quality on human health has become the consensus of academic circles and society, and many researches indicate that PM2.5 and PM10 in the environment cause remarkable harm to human health, especially respiratory systems and circulatory systems, but forecast data of PM2.5 in China only can illustrate the air quality of monitoring stations, and conditions such as indoor smoking, cooking and roadside community automobile exhaust enrichment are extremely easy to cause remarkable increase of local PM2.5 concentration, and PM2.5 detection in specific environments is more critical for susceptible people such as old people, infants and pregnant women. Through the investigation of the handheld air quality detector products, we find that a large number of domestic equipment has moderate price, but the accuracy and consistency are often poor, the detection requirement is difficult to meet, and the detector has no function of collecting samples, so that the components and the content of the particulate matters cannot be deeply analyzed.
The utility model discloses a dust concentration sensor like CN 201615883U, including dust passageway and air exhaust fan, this dust passageway includes dust inlet channel and dust passageway of giving vent to anger, and air exhaust fan sets up in dust passageway one end of giving vent to anger, and dust inlet channel is the level and arranges, and dust passageway of giving vent to anger is vertical arrangement, and the dust easily falls down under the effect of air exhaust fan and its own gravity, can not deposit in the passageway, has guaranteed dust concentration sensor's measurement accuracy. However, the device is limited in use direction, dust can not be deposited only when the dust outlet channel is in a vertical state, and the problem of measurement accuracy of the dust sensor can not be comprehensively and effectively solved.
In order to solve the above problems, a hand-held air quality sampling detector is needed by those skilled in the art, which not only can collect air samples conveniently and rapidly and detect air quality data, but also can ensure the accuracy of the detected data.
Disclosure of Invention
The invention provides an air quality sampling detector which not only can conveniently and rapidly collect air samples, but also can detect air quality data and ensure the accuracy of the detected data.
To achieve the above object, the present invention relates to an air quality sampling detector, comprising: the device comprises a shell, an air channel and a control unit, wherein the shell comprises an upper shell and a lower shell which are buckled to form a shell inner cavity; the air channel is arranged in the inner cavity of the shell, the openings at the two ends are hollow, the openings at the two ends are respectively an air inlet and an air outlet, a detection cavity is arranged between the air inlet and the air outlet, a driving pump is arranged at the air outlet, air to be detected enters the detection cavity from the air inlet, the driving pump drives the detection cavity to move, and the air to be detected is discharged from the air outlet; the control unit comprises a sensor and a display module, wherein the sensor is positioned in the air channel detection cavity and used for detecting air quality data, and the control unit receives the air quality data detected by the sensor and displays the air quality data on the display module; the sampling assembly is positioned between the detection cavity and the driving pump, the whole sampling assembly is in a hollow tubular shape with openings at two ends, the hollow inside of the sampling assembly is a sampling cavity, one end of the sampling assembly is communicated with the detection cavity of the air channel, the other end of the sampling assembly is communicated with the driving pump, the sampling assembly comprises a sampler, a rotating piece and a fixing piece, the rotating piece is in sealing connection with the fixing piece through a rotating shaft, and the sampling cavity is isolated and sealed from the outside after the connection; the sampler comprises a supporting plate and a sampling filter membrane, the sampler vertically cuts off a sampling cavity of the sampling assembly, and the outer wall of the sampler is in sealing connection with the inner wall of the sampling cavity of the sampling assembly.
The shell is in a cuboid shape with a hollow inside, four edges are chamfered, the surface is smooth and attractive, and the shell is suitable for being held by a hand. The size of the inner cavity of the channel is set according to the requirement, the whole air channel is positioned in the inner cavity of the shell, an air inlet at one end penetrates through the shell and is communicated with the outside atmosphere, an air outlet at the other end also penetrates through the shell and is communicated with the outside atmosphere, specifically, the air outlet can be an air outlet of the driving pump or an opening of the driving pump extending through the shell, when the driving pump is a positive and negative rotation air pump or a positive and negative rotation fan, the driving direction of the driving pump is turned, the air outlet is immediately converted into the air inlet, and the air inlet is immediately converted into the air outlet. The air channel is provided with at least one detection cavity at the part of the inner cavity of the shell, the inner wall of the detection cavity is adjacent to the outer wall of the sensor, the overall shape of the detection cavity is consistent with that of the sensor, the distance between the inner wall of the detection cavity and the outer wall of the sensor is preferably 0.5mm-3mm, the gap is arranged to enable the detection inlet of the sensor to directly accept air to be detected, meanwhile, no cavity dead angle is reserved in the detection cavity, no air particles are left in the cavity dead angle, and the accuracy of air detection data at each time is ensured. In order to handle the case of multiple sensors, a plurality of detection chambers with different sizes may be disposed on the air channel, where each detection chamber corresponds to a sensor with a different size, for example: the PM sensor is a laser scattering tiny particle sensor and is used for measuring the concentration of PM2.5 and/or PM10 in the air; the temperature and humidity sensor is used for measuring the temperature of the air and the humidity of the air; a carbon dioxide sensor for detecting a parameter related to carbon dioxide in the air; the VOC sensor is used for detecting the related parameters of formaldehyde, ammonia, glycol, esters and the like which are volatile organic compounds.
The detection process comprises the following steps: the driving pump drives air to be detected to move, the detected air enters the detection cavity through the air inlet and enters the detection cavity through the connecting pipe, the air quality data are detected by various sensors, then the detected air flows out of the detection cavity through the connecting pipe, and finally the detected air flows out of the air outlet. The front end and the rear end of the detection cavity are removed to be communicated with the outside, the detection cavity seals various sensors in independent spaces, the problem of poor precision caused by the fact that the sensors are exposed outside or not tightly sealed is avoided, and when the detector operates for 2 minutes, air quality data detected by the sensors in the detection cavity are stable, so that the detection precision is guaranteed.
The control unit comprises a central processor, the central processor controls the driving pump to drive air to be detected to flow, the volume of air flowing in unit time is changed according to the air flowmeter, air to be detected under various flow rates is detected by using the sensor, accurate air quality data is obtained, and finally the data is displayed on the display module, wherein the display module is a liquid crystal display screen with a touch control function, and the touch control display screen can be used for operating the detector to operate.
The sampling assembly is located between the last detection cavity and the driving pump, the whole body is in a circular tube shape with larger diameter, the rotating part is a part in the middle of the circular tube, when the sampling assembly is matched with the fixing part to form a complete circular tube shape, the sampling cavity is isolated and sealed from the outside, the function of communicating the detection cavity with the driving pump is achieved when the air quality is detected, the sealing mode is formed by adopting a sealing ring arranged between the rotating part and the fixing part or adopting special treatment of the contact surface of the rotating part and the fixing part. When the air sample is collected, the rotating piece rotates around the rotating shaft, so that the rotating piece and the fixed piece are staggered, the sampling cavity is opened to the outside, the sampler is vertically and coaxially arranged in the sampling cavity, two sides of the sampling cavity are cut off, then the rotating piece reversely rotates around the rotating shaft, the rotating piece and the fixed piece are sealed and screwed together again to form a complete circular tube shape, and at the moment, the central processing unit controls the driving pump to drive the air flow to be detected, so that accurate air quality data can be obtained, and an air pollutant sample can be obtained on the sampler. Above-mentioned sample thief can be a plurality of, and every sample thief sampling filter membrane filterable particle diameter is different, like 10um filter membrane, 2.5um filter membrane, 0.3um filter membrane, arranges in grades in sampling cavity inside according to sampling particle size, sampling filter membrane selects PC or PET's film, perhaps selects polytetrafluoroethylene's film, is equipped with the stereoplasm backup pad that supports sampling filter membrane in sampling filter membrane periphery, adopts plastics material or metal material to make, prevents that sampling filter membrane fold from warping. When the air quality data is detected, an air pollutant sample is acquired, the current sample state can be corresponding to the air quality data, the generation of air pollution and the influence of various pollutants on the air quality can be conveniently researched, and the air monitoring and treatment department is facilitated.
In order to ensure that the sampler is smoothly placed in the sampling cavity, a placement door is arranged on the lower shell and is movably connected with the lower shell in a folding way, and the placement door is opened to move the rotating piece and place the sampler.
The detector also includes a marking means that prints the time, place and air condition of the sample on the sampler support plate. The marking component is specifically an embedded micro thermal printer, the micro thermal printer is connected with a central processing unit of a control unit, thermal printing paper is attached to the surface of a supporting plate, the thermal printer is utilized to print a sampler number, air sampling time, an air sampling place, air conditions during sampling and the like on the printing paper, and the air conditions during sampling specifically comprise: the content of particulate matters in the air, the duty ratio of the particulate matters with various diameters, the change value in unit time and the like. Of course, the above-mentioned data can also be printed directly on the support plate by using a micro laser printer. An electronic memory chip can be embedded in the sampler, and the data can be written in by a central processing unit connected with the control unit.
The sampler support plate comprises a top plate and a bottom plate, the top plate and the bottom plate are hollow annular, a sampling filter membrane is clamped and supported between the top plate and the bottom plate, the top plate and the bottom plate are buckled to form a support plate, a sealing ring is arranged at the outer edge of the support plate, and the outer wall of the sampler is in sealing connection with the inner wall of a sampling cavity of the sampling assembly through the sealing ring. Because the sampler both need vertically cut off at sampling cavity inside, need keep sealed with rotating member, mounting inner wall again, so the sampler sets up the backup pad and supports sampling filter membrane, and this backup pad selects for use plastics material comparatively suitable, utilizes two cavity annular roof and bottom plate to link together, and the connected mode can adopt ultrasonic heat seal or binder bonding, and roof and bottom plate centre gripping support sampling filter membrane, makes the section of cutting off sampling cavity of sampling filter membrane flattening to gather the air sample. The roof and the bottom plate are connected together to form the backup pad, and the backup pad outer fringe sets up the recess and holds the sealing washer of rubber material, guarantees the leakproofness of sample thief and sampling chamber inner wall contact position through this sealing washer.
The rotary part is connected with the fixed part through a rotary shaft, and the sampling cavity is isolated and sealed with the outside. The position of the rotary piece and the fixed piece in matched contact also needs to be sealed, so that the air sample collected by the sampler is a sample in the collection cavity and does not enter through a gap between the rotary piece and the fixed piece, on one hand, the accuracy of the air sample is guaranteed, and on the other hand, the air quality data obtained by the front-end sensor and the collected air sample can be in one-to-one correspondence. In addition, the rotary piece and the fixed piece can be sealed by adopting a special treatment process at the matched contact position, and the contact surface can be sealed by adopting a sand blasting process, a sand polishing process and polishing.
The inner wall of rotating part and mounting is equipped with the draw-in groove, sampler backup pad outer fringe conformally is located inside the draw-in groove, and the vertical sampling cavity of cutting off sampling assembly of sampler, the inner wall sealing connection of sampler outer wall and sampling assembly draw-in groove department. In the air sampling process, the driving pump drives air to flow, so that the sampler is not deflected in the sampling cavity and is always in a state of vertically cutting off the sampling cavity, the clamping groove is arranged, the sampler can be effectively fixed by placing the sampler in the clamping groove, and sealing between the sampler and the sampling cavity is facilitated.
The driving pump is a positive and negative rotation air pump and is provided with an air extraction gear and an air blowing gear, one end of the driving pump is communicated with the sampling cavity, and the other end of the driving pump is communicated with the air outlet. The driving pump is connected with the central processing unit of the control unit, and a miniature forward and reverse rotating fan or a miniature forward and reverse rotating air pump is adopted, so that the air can be switched between a forward rotating air extraction gear and a reverse rotating air blowing gear, an air sample can be collected during forward rotating air extraction gear, air quality data can be detected, and air condition data can be printed on the upper surface of the supporting plate at the edge of the sampler by using the marking component. When reversing the gear of blowing, can follow the air outlet entering air, the sensor of whole air passage of reverse blasting and detection air quality plays clean air passage and sensor's effect, guarantees the degree of accuracy and the uniformity of detector testing result, saves the high calibration cost that the detector needs the calibration to spend after using a period.
The detector also comprises a gas control valve, wherein the gas control valve is positioned between the driving pump and the air outlet, the gas control valve comprises a detection position and a backflushing position, when the gas control valve is manually controlled to the detection position, the gas control valve corresponds to the pumping gear of the driving pump, when the gas control valve is manually controlled to the backflushing position, the gas control valve corresponds to the blowing gear of the driving pump, and one end of the backflushing position of the gas control valve is provided with an air filtering membrane. The air control valve is communicated with the driving pump, the air outlet is positioned at the tail end of a valve body of the air control valve, the air control valve is a rotary three-way valve, one end of the air control valve is communicated with the driving pump, the other two ends of the air control valve are respectively provided with a detection position and a backflushing position, one end of the backflushing position is provided with an air filtering membrane, the rotary three-way valve comprises a valve body, a valve cavity and a handle, the handle controls the valve body to rotate in the valve cavity, when the valve body closes one end of the backflushing position, the handle points to the detection position, the driving pump is in a forward rotation air extraction gear, air to be detected enters from the air inlet, passes through the detection cavity, the sampling cavity and the driving pump, and is finally discharged from the air outlet, and air samples are collected under the state, and air quality data is detected; when the valve body is closed at one end of the detection position, the handle points to the backflushing position, the driving pump is in the reverse air-blowing gear, air to be detected enters from the air outlet, and is discharged from the air inlet through the driving pump, the sampling cavity and the detection cavity, and the air is reversely flushed by clean air passing through the air filtering membrane and the sensor in the backflushing position because the air filtering membrane is arranged at one end of the backflushing position, so that the accuracy and the consistency of the detection result of the detector are ensured.
The inner wall of the air channel is provided with a non-stick ash coating, and the non-stick ash coating prevents particles from adhering to the inner wall of the air channel to influence the detection precision. The whole air channel inner wall is subjected to ash-sticking-free treatment, so that particulate matters such as PM2.5 in the air in the sampling process are prevented from being adhered to the air channel inner wall due to static electricity and the like, the detection accuracy is further affected, and the pump is driven to reversely flush the air channel. The specific non-sticky ash treatment process is selected as follows: the surface antistatic component coating process, the vapor condensation prevention coating process and the mirror surface treatment improve the finish.
The inside at least one stirring fan that is equipped with of air channel, this stirring fan is located the air channel inside between air inlet to the driving pump, prevents that the particulate matter from remaining in the detection chamber dead angle and influencing detection precision. The stirring fan is suspended inside the air channel and is preferably arranged inside the detection cavity, air to be detected flows in the air channel through the action of the driving pump, the stirring fan rotates along with the air flow, the air to be detected inside the air channel is stirred, the air flows in a rotating mode, particles in the air are not easy to adhere to the inner wall of the air channel, and the accuracy of the detector is guaranteed.
The air channel is provided with a sampling tube extending to the outside of the shell, the sampling tube is connected with an air collecting head, the air collecting head is in the shape of an umbrella with a hollow inside, air inlets are uniformly distributed on the outer surface of the air collecting head, and the hollow inside of the air collecting head is communicated with a detection cavity. The sampling tube is a sampling channel connected with the outside, the sampling distance of the air inlet is prolonged, the air can be detected and collected in the special cavity and the local cavity, the air quality is detected, and the detection precision under the special environment is ensured. For guaranteeing that the detected air who gathers belongs to extensive sample, not local scope sample, be equipped with the air acquisition head in the casing outside, this air acquisition head encircles and sets up on the detector top, can be umbrella form, platykurtic, cylindric, polygon body shape etc. the inside cavity of this air acquisition head is linked together with air channel's detection chamber, utilizes air acquisition head surface evenly distributed's air inlet to gather detected air, and this structural design is favorable to air quality data stability, guarantees the detection precision.
The control unit also comprises an alarm module, a switch key and a power supply module, wherein the alarm module sends out an alarm prompt when the control unit receives the air quality data detected by the sensor and reaches a preset pollution value; the switch key is positioned at the upper shell of the shell and used for controlling the starting and stopping of the detector; the power module is positioned in the inner cavity of the shell and supplies power for all parts of the detector. The alarm module has alarm prompt tone and alarm vibration function, and because of the air pollution degree difference that detects, alarm tone size and vibration frequency take place differently, clearly indicate the pollution current situation of detector user air. For example: 1. the Air Pollution Index (API) is 0-50, is a national daily average value primary standard of air quality, has excellent air quality, meets the air quality requirements of natural protection areas, scenic spots and other areas needing special protection, and does not send alarm sound and vibration at the moment; 2. (API) 51-100, which is a national air quality daily average secondary standard, has good air quality, meets the air quality requirements of residential areas, commercial areas, cultural areas, general industrial areas and rural areas, and the alarm module sends out a slight alarm; 3. (API) 101-200, which is three-level standard, wherein the air quality is light pollution, if the air is contacted with the air for a long time, the symptoms of susceptible people are slightly aggravated, and the healthy people have stimulation symptoms, and at the moment, the alarm module sends out moderate alarm sound; 4. (API) 201-300, which is a four-level standard, wherein the air quality is moderate pollution, after contacting the air of the level for a certain time, the symptoms of heart disease and pulmonary disease patients are obviously aggravated, the exercise tolerance is reduced, the symptoms commonly appear in healthy people, and at the moment, the alarm module sends out moderate alarm sound and vibration; 5. the (API) is more than 300, the air quality is severely polluted, and the alarm module sends out intensity alarm sound and vibration. The switch key is specifically connected with the control unit and can send an instruction to the control unit, and the control unit is used for controlling each component of the detector to work cooperatively. The detector can be directly powered by an alternating current power supply, but in order to ensure that the detector is used outdoors, the power supply module can also select a rechargeable lithium battery, so that the detector is convenient to move to the outdoors. The control unit also comprises a zero clearing module which is positioned at the air inlet of the air channel, in particular to a component capable of filtering air until the value is zero and is used for calibrating the detector.
Drawings
FIG. 1 is a schematic diagram 1 of a three-dimensional cutaway structure of an air quality sampling detector of the present invention;
FIG. 2 is a schematic diagram 1 of a three-dimensional structure of an air quality sampling detector according to the present invention;
FIG. 3 is an enlarged schematic view of the portion A of FIG. 2 according to the present invention;
FIG. 4 is a schematic diagram of a three-dimensional structure of an air quality sampling detector 2 according to the present invention;
FIG. 5 is an enlarged schematic view of the portion B of FIG. 4 according to the present invention;
FIG. 6 is a schematic diagram of a three-dimensional cutaway structure of a sampler of the air quality sampling detector of the present invention;
FIG. 7 is a schematic diagram of a three-dimensional structure of an air quality sampling detector according to the present invention;
FIG. 8 is an enlarged schematic view of the portion C of FIG. 7 according to the present invention;
FIG. 9 is a schematic diagram 1 showing a three-dimensional cutaway structure of a gas control valve of an air quality sampling detector according to the present invention;
FIG. 10 is a schematic drawing of a three-dimensional cutaway structure of a gas control valve of the air quality sampling detector of the present invention, FIG. 2;
FIG. 11 is a schematic drawing of a three-dimensional cutaway structure of the air quality sampling detector of the present invention, FIG. 2;
FIG. 12 is a schematic view of a three-dimensional cutaway structure of an air collection head of the air quality sampling detector of the present invention 1;
FIG. 13 is a schematic drawing of a three-dimensional cutaway view of an air acquisition head of the air quality sampling detector of the present invention, FIG. 2;
in the figure: 1. a housing; 11. an upper housing; 12. a lower housing; 10. a housing interior; 13. a shock pad; 14. a door is arranged; 2. an air passage; 21. driving a pump; 22. a detection chamber; 201. an air inlet; 202. an air outlet; 203. a sampling tube; 204. a non-stick gray coating; 205. a stirrer fan; 206. an air collection head; 207. a communication valve; 23. a connecting pipe; 3. a control unit; 31. a sensor; 32. a display module; 321. a liquid crystal display; 33. an alarm module; 34. a switching key; 35. a power module; 36. a charging module; 37. a zero clearing module; 4. a sampling assembly; 40. a sampling cavity; 41. a sampler; 411. a support plate; 411a, top plate; 411b, a bottom plate; 412. sampling a filter membrane; 413. screwing in a handle; 414. a clamping protrusion; 42. a rotating member; 421. a rotation shaft; 43. a fixing member; 44. a seal ring; 45. a clamping groove; 451. a convex engagement position; 46. a marking member; 47. sealing surfaces; 5. a gas control valve; 51. detecting a position; 52. a recoil position; 53. an air filtration membrane; 54. a one-way valve.
Detailed Description
Example 1:
as shown in fig. 1 to 6, an air quality sampling detector includes: the shell 1, air channel 2, the control unit 3, the shell 1 divide into upper casing 11 and lower casing 12, all adopts ABS resin to mould plastics and makes, and both lock forms the casing inner chamber 10, and wherein upper casing 11 has offered the through-hole for setting up liquid crystal display 321, on-off key 34, charge module 36, and lower casing 12 has offered the through-hole for the sampler 41 of convenient installation sampling subassembly 4, and has covered on the through-hole and settled door 14. Because the detector can generate slight vibration in the working process, the shock pad 13 is arranged on the bottom surface of the lower shell 12, so that the detector can be ensured not to fall down due to displacement caused by vibration in the tabletop working process. An air channel 2 is arranged in a shell inner cavity 10 of the shell 1, the air channel 2 comprises a plurality of sections of connecting pipes 23, a rectangular box forming a detection cavity 22, a cylindrical box forming a sampling cavity 40 and a driving pump 21 driving detection air to flow, the box bodies are all made of ABS resin by injection molding, the connecting pipes 23 are made of rubber materials, one ends of the connecting pipes 23 can directly penetrate through the shell 1 to be communicated with the outside of the shell 1, and sampling pipes 203 made of metal materials can also be connected to be communicated with the outside of the shell 1 to form an air inlet 201; the other end of the connecting pipe 23 is communicated with the detecting cavity 22, the other end of the detecting cavity 22 is also connected with the connecting pipe 23, the connecting pipe 23 is communicated with the sampling cavity 40, and finally the connecting pipe 23 is communicated with the driving pump 21, and the driving pump 21 discharges the detecting air from the air outlet 202 to the outside of the shell 1 to form the whole air channel 2. Of course, the connection pipe 23 can be omitted in the connection, direct communication is adopted, a simpler and more convenient machining and assembling process is formed, and better air flowability is obtained.
The control unit 3 comprises a sensor 31 and a display module 32, wherein the sensor 31 is specifically a PM sensor, and the PM sensor is a laser scattering tiny particle sensor and is used for measuring the concentration of PM2.5 or PM10 in air; the temperature and humidity sensor is used for measuring the temperature of the air and the humidity of the air; a carbon dioxide sensor for detecting a parameter related to carbon dioxide in the air; the VOC sensor is used for detecting the related parameters of formaldehyde, ammonia, glycol, esters and the like which are volatile organic compounds. The control unit 3 receives the air quality data detected by the sensor 31, and displays the air quality data on the liquid crystal display 321 of the display module 32, and the liquid crystal display 321 may be a liquid crystal display 321 with a touch control function, and the operation detector operates by using the touch control display. To ensure the detection accuracy, the sensor 31 is located inside the detection cavity 22, specifically, a rectangular box forming the detection cavity 22 is wrapped outside the sensor 31, and the detection cavity 22 seals the sensor 31 outside except for an air inlet and an air outlet of the air detected by the sensor 31. Of course, a certain distance can be set between the inner wall of the detection cavity 22 of the air channel 2 and the outer wall of the sensor 31, preferably between 0.5mm and 3mm, and most preferably 1mm, so that the inner wall of the detection cavity 22 is firmly matched with the outer wall of the sensor 31, random displacement is not generated, and the air to be detected is ensured to be detected by the sensor 31.
As shown in fig. 1, the air channel 2 is provided with a sampling tube 203 extending to the outside of the housing 1, the sampling tube 203 is communicated with a connecting tube 23 of the air channel 2, and is made of metal or rubber, the sampling tube 203 can be connected with one section to extend length, and also can be bent at will to penetrate into the inside of a special cavity and the inside of a local cavity, thereby being beneficial to collecting and detecting air quality and ensuring the detection precision under the special environment.
As shown in fig. 2, the detector is provided with a mounting door 14 on the lower housing 12, the mounting door 14 is movably connected with the lower housing 12 by a hinge, the mounting door 14 is opened by a human hand, the sampling assembly 4 and a part of the air channel 2 can be seen, the human hand stretches into the inner cavity 10 of the housing to operate a rotary member 42 for opening the sampling assembly 4, a sampler 41 of the sampling assembly 4 is vertically arranged in a sampling cavity 40 formed by the rotary member 42 and a fixing member 43, and the mounting door 14 is buckled to finish the mounting of the sampler 41. Conversely, after the air sample is collected, the sampler 41 is taken out. As shown in fig. 3, the sampling assembly 4 is hollow and tubular, and comprises a rotating member 42 and a fixing member 43, wherein the sampling assembly 4 is transversely cut into tubular shape, one part is the rotating member 42, the other part is the fixing member 43, the two parts are movably connected by a rotating shaft 421 to form a sampling cavity 40 of the sampling assembly 4 together, and in order to ensure the tightness of the contact position of the rotating member 42 and the fixing member 43, a sealing surface 47 is arranged at the contact position of the rotating member 42 and the fixing member 43, and the sealing surface 47 is subjected to frosting or sand blasting treatment. The clamping grooves 45 are formed in the rotating piece 42 and the fixing piece 43, the clamping grooves 45 are used for accommodating the sampler 41, the sampler 41 is kept to be vertically positioned in the sampling cavity 40, deflection displacement does not occur, and sampling accuracy is guaranteed. The sampler 41 has a support plate 411 and a sampling filter membrane 412, wherein the support plate 411 comprises a hollow annular top plate 411a and a hollow annular bottom plate 411b, both are made of ABS plastic materials, and the two are used for clamping and supporting the sampling filter membrane 412, so that the flatness of the sampling filter membrane 412 is ensured; the sampling filter 412 is made of polytetrafluoroethylene film material, and the sampling filter 412 with different apertures can be installed on the collector 41 according to different diameters of collected particles, for example: the aperture is 10um, 2.5um, less than or equal to 0.3um, etc. A groove is arranged at the outer edge of the supporting plate 411 of the collector 41, a sealing ring 44 is arranged in the groove, and the tightness of the supporting plate 411 of the collector 41 matched with the inner wall of the clamping groove 45 is maintained.
As shown in fig. 4, the mounting door 14 of the detector is detachable from the lower case 12, and similar to the structure of the battery case cover in the prior art, the mounting door 14 is prevented from interfering with the manual installation of the sampler 41. As shown in fig. 5 and 6, the tubular sampling assembly 4 is longitudinally cut twice, the middle section is a rotating member 42, two sections on two sides are fixing members 43, the two sections are movably connected by a rotating shaft 421, the two sections are connected to form a sampling cavity 40 of the sampling assembly 4 together after being connected, the sampling assembly 4 can be directly cut off, the middle section is the rotating member 42, two sections on two sides are the fixing members 43, the rotating member 42 is inserted between the two sections of fixing members 43, and the rotating member 42 and the fixing members 43 are not required to be connected by the rotating shaft 421, so that the tubular sampling assembly 4 is formed by splicing. In order to ensure the tightness of the contact position between the rotating member 42 and the fixing member 43, two sealing rings 44 are provided at the contact position to seal the connection positions between the two ends of the rotating member 42 and the fixing member 43. The inner wall of the rotating member 42 is provided with a clamping groove 45 and two clamping convex matching positions 451, the outer edge of the sampler 41 is provided with two clamping convex 414, a person holds the screwing-in handle 413 of the sampler 41, the clamping convex 414 is firstly aligned with the clamping convex matching positions 451 to push the clamping convex 414 towards the inside of the rotating member 42, the clamping convex 414 is pushed to the inside of the clamping groove 45 through the clamping convex matching positions 451, the screwing-in handle 413 of the sampler 41 is rotated by a certain angle, the clamping convex 414 is clamped in the clamping groove 45, the sampler 41 is kept to be vertically positioned in the sampling cavity 40 formed by the rotating member 42, deflection displacement does not occur, and the sampling accuracy is ensured. As shown in fig. 6, thermal printing paper is attached to the surface of the supporting plate 411 of the sampler 41, and the marking unit 46 is specifically an embedded micro thermal printer connected to the central processor of the control unit 3, and the sampler number, the air sampling time, the air sampling place, the air condition at the time of sampling, etc. are printed on the printing paper by the thermal printer, and the air condition at the time of sampling specifically includes: the content of particulate matters in the air, the duty ratio of the particulate matters with various diameters, the change value in unit time and the like.
As shown in fig. 7, the air quality sampling detector has the function of cleaning the air channel 2, ensures the accuracy of the detection result obtained by using the detector for a long time, and omits the high calibration cost for calibration after the detector is used for a period of time. The driving pump 21 is a positive and negative rotation fan, and has an air extraction gear and an air blowing gear, one end of the driving pump 21 is communicated with the sampling cavity 40, the other end is communicated with the air outlet 202, the driving pump 21 is connected with the central processing unit of the control unit 3, and the micro positive and negative rotation fan is adopted, so that an air sample can be collected when the air extraction gear is positively rotated, air quality data can be detected, air can be fed from the air outlet 202 when the air blowing gear is reversely rotated, and the whole air channel 2 and the sensor 31 are reversely flushed. As shown in fig. 8 and 9, one end of the driving pump 21 is communicated with the sampling cavity 40, the other end is communicated with the gas control valve 5, the gas control valve 5 comprises a detection position 51 and a recoil position 52, the gas control valve 5 is connected with a central processing unit of the control unit 3, and particularly a rotary three-way valve comprises a valve body, a valve cavity and a handle, as shown in fig. 9, the handle controls the valve body to rotate in the valve cavity, when the handle rotates to the detection position 51, the central processing unit of the control unit 3 sets the driving pump 21 in a forward rotation air suction gear, air to be detected enters from the air inlet 201, passes through the detection cavity 22, the sampling cavity 40 and the driving pump 21 and is finally discharged from the air outlet 202, and air samples are collected and air quality data are detected in the state; as shown in fig. 8, when the handle rotates to the back flushing position 52, the central processing unit of the control unit 3 sets the driving pump 21 at the reverse air blowing gear, air to be detected enters from the air outlet 202, and is discharged from the air inlet 201 through the driving pump 21, the sampling cavity 40 and the detecting cavity 22, and the air filtering membrane 53 is arranged at one end of the back flushing position 52, so that the clean air passing through the air filtering membrane 53 in this state reversely flushes the air channel 2 and the sensor 31, and the accuracy and consistency of the detection result of the detector are ensured.
As shown in fig. 10, the gas control valve 5 is a three-way pipeline, one end of the gas control valve is communicated with the driving pump 21, two one-way valves 54 are respectively arranged at the other two ends of the gas control valve, when the driving pump 21 is arranged at a forward rotation pumping gear, air to be detected enters from the air inlet 201 and flows through the three-way pipeline through the detection cavity 22, the sampling cavity 40 and the driving pump 21, at the moment, the one-way valve 54 at the detection position 51 is opened, the one-way valve 54 at the recoil position 52 is closed, and the air is finally discharged to the air outlet 202 through the one-way valve 54 at the detection position 51, so that an air sample is collected under the state, and air quality data is detected; in contrast, when the central processing unit of the control unit 3 sets the driving pump 21 at the reverse air-blowing gear, air enters from the air outlet 202 at this time, the check valve 54 of the backflushing position 52 is opened, the check valve 54 of the detecting position 51 is closed, the air flows through the three-way pipeline, the air filtering membrane 53 is arranged at one end of the backflushing position 52, clean air passes through the driving pump 21, the sampling cavity 40 and the detecting cavity 22, and finally the air is discharged from the air inlet 201, and the air channel 2 and the sensor 31 are backflushed, so that the accuracy and consistency of the detection result of the detector are ensured.
As shown in fig. 11, the inner walls of the air channels 2 are all provided with the non-stick ash coating 204, so that particulate matters such as PM2.5 in the air in the sampling process are prevented from adhering to the inner walls of the air channels 2 due to static electricity and the like, and further, the detection accuracy is prevented from being affected. The specific non-sticky ash treatment process can be selected as follows: the surface antistatic component coating process, the vapor condensation prevention coating process and the mirror surface treatment improve the finish. The detection cavity 22 is internally provided with a stirring fan 205, the stirring fan 205 is vertically suspended at the center of the detection cavity 22, air to be detected flows in the air channel 2 under the action of the driving pump 21, the stirring fan 205 rotates along with the air flow, the air to be detected in the air channel 2 is stirred, the air rotates and flows, and particles in the air are not easy to adhere to the inner wall of the air channel 2, so that the precision of the detector is ensured. The control unit 3 further comprises a zero clearing module 37, an alarm module 33, a switch key 34, a power module 35 and a charging module 36, wherein the zero clearing module 37 is connected with the air inlet 201 of the air channel 2, one zero clearing filter is arranged, the filtering efficiency of the zero clearing filter is required to be greater than 99.97% (under the flow condition of 1.5L/min), the ventilation resistance is required to be less than 100 Pa (under the flow condition of 1.5L/min), the filter shell is made of ABS plastic materials, and the inner filter material is polytetrafluoroethylene, PP filter cotton and other materials. When the zero clearing module 37 is connected, the air quality data displayed by the display module 32 is zero, and the detector sensor 31 is calibrated at this time, so that convenience is provided for subsequent air quality detection. The alarm module 33 comprises a vibration motor and an audio component, when the air quality data detected by the sensor 31 is received by the control unit 3 and reaches a preset pollution value, the alarm module 33 sends out alarm prompt tone and alarm vibration, and the pollution status of the air of a detector user is clearly prompted due to different detected air pollution levels and different alarm tone sizes and vibration frequencies. The switch key 34 is located at the upper shell 11 of the shell 1, is specifically connected with the control unit 3, and can send instructions to the control unit 3, and the control unit 3 is used for controlling the components of the detector to work cooperatively. The power module 35 supplies power to each component of the detector, is located inside the inner cavity 10 of the shell 1, specifically is a rechargeable lithium battery, and is convenient for the detector to move to the outdoor use. The charging module 36 is a charging receiving port of the lithium battery of the power module 35, and is automatically disconnected after the power module 35 is charged, so that the service life of the lithium battery is prolonged.
As shown in fig. 12 and 13, the air channel 2 is provided with an air collection head 206 extending to the outside of the housing 1, the air collection head 206 is made of metal or plastic, and is provided with an air sampling cavity with a hollow inside, which is communicated with a sampling tube 203 of the air channel 2 and a detection cavity 22 of the air channel 2, the air collection head 206 is integrally provided with an umbrella-shaped or cake-shaped sampling surface with a larger range, and can collect the detection air in a 360-degree annular shape, and the air inlets 201 uniformly distributed on the surface of the air collection head 206 are combined to collect the detection air, so that the homogenization of sampling is facilitated, the detected air quality data is stable, and the detection accuracy is ensured. In order to facilitate the conversion between the air collection head 206 and the sampling tube 203, the detector is also provided with a communication valve 207, the air collection head 206 can be blocked and communicated with the detection cavity 22 of the air channel 2 by rotating the communication valve 207, and only the sampling tube 203 is kept to be communicated with the detection cavity 22 of the air channel 2, so that the detection air in the special cavity and the detection air in the local cavity can be collected in a directional manner; in contrast, the communication valve 207 is opened, the air collection head 206 and the sampling tube 203 are both communicated with the air channel 2 detection cavity 22, and a larger air collection range is provided at the moment, so that the detected air quality data is stable, and the detection precision is ensured.
Claims (9)
1. An air quality sampling detector comprising:
the shell (1), the shell (1) comprises an upper shell (11) and a lower shell (12), and the upper shell (11) and the lower shell (12) are buckled to form a shell inner cavity (10); the air channel (2) is arranged in the shell inner cavity (10) of the shell (1), the two ends of the air channel are open and hollow, the two ends of the air channel are respectively provided with an air inlet (201) and an air outlet (202), a detection cavity (22) is arranged between the air inlet (201) and the air outlet (202), a driving pump (21) is arranged at the air outlet (202), air to be detected enters the detection cavity (22) from the air inlet (201), the driving pump (21) drives the detection cavity (22) to move, and the air to be detected is discharged from the air outlet (202); the control unit (3), the said control unit (3) includes the sensor (31) and display module (32), the said sensor (31) locates in the air channel (2) and detects the cavity (22) and detects the air quality data, the air quality data that the sensor (31) detects of the control unit (3) receiving, reveal on the display module (32); the device is characterized by further comprising a sampling assembly (4), wherein the sampling assembly (4) is positioned between the detection cavity (22) and the driving pump (21), the whole device is in a tube shape with two open ends and hollow inside, the hollow inside is a sampling cavity (40), one end of the sampling assembly is communicated with the detection cavity (22) of the air channel (2) in an opening manner, the other end of the sampling assembly is communicated with the driving pump (21) in an opening manner, the sampling assembly (4) comprises a sampler (41), a rotating piece (42) and a fixing piece (43), the rotating piece (42) is connected with the fixing piece (43) in a sealing manner through a rotating shaft (421), and the sampling cavity (40) is isolated and sealed from the outside after the connection; the sampler (41) comprises a supporting plate (411) and a sampling filter membrane (412), the sampler (41) vertically cuts off a sampling cavity (40) of a sampling assembly (4), the outer wall of the sampler (41) is in sealing connection with the inner wall of the sampling cavity (40) of the sampling assembly (4), the sampler further comprises a gas control valve (5), the gas control valve (5) is positioned between a driving pump (21) and an air outlet (202), the gas control valve (5) comprises a detection position (51) and a backflushing position (52), when the gas control valve (5) is manually controlled to the detection position (51), the gas control valve (5) corresponds to an air suction gear of the driving pump (21), when the gas control valve (5) is manually controlled to the backflushing position (52), and one end of the backflushing position (52) of the gas control valve (5) is provided with an air filter membrane (53).
2. The air quality sampling detector according to claim 1, further comprising a marking means (46), the marking means (46) printing the time, place and air condition of the sampling on the support plate (411) of the sampler (41).
3. The air quality sampling detector according to claim 1, wherein the supporting plate (411) of the sampler (41) comprises a top plate (411 a) and a bottom plate (411 b), the top plate (411 a) and the bottom plate (411 b) are hollow annular, a sampling filter membrane (412) is clamped and supported between the top plate (411 a) and the bottom plate (411 b), the supporting plate (411) is formed by buckling the top plate (411 a) and the bottom plate (411 b), a sealing ring (44) is arranged on the outer edge of the supporting plate (411), and the outer wall of the sampler (41) is in sealing connection with the inner wall of the sampling cavity (40) of the sampling assembly (4) through the sealing ring (44).
4. The air quality sampling detector according to claim 1, wherein a sealing ring (44) is arranged at the joint of the rotary member (42) and the fixed member (43), and the sampling cavity (40) is isolated and sealed from the outside after the rotary member (42) is connected with the fixed member (43) through the rotary shaft (421).
5. The air quality sampling detector according to claim 1, wherein the inner walls of the rotating member (42) and the fixing member (43) are provided with clamping grooves (45), the outer edges of the supporting plates (411) of the sampler (41) are located inside the clamping grooves (45) in a conformal mode, the sampler (41) vertically cuts off the sampling cavity (40) of the sampling assembly (4), and the outer walls of the sampler (41) are in sealing connection with the inner walls of the clamping grooves (45) of the sampling assembly (4).
6. The air quality sampling detector according to any one of claims 1-5, wherein the driving pump (21) is a positive and negative rotation air pump, and has an air suction gear and an air blowing gear, and one end of the driving pump (21) is communicated with the sampling cavity (40), and the other end is communicated with the air outlet (202).
7. The air quality sampling detector according to claim 6, wherein the inner wall of the air channel (2) is provided with a non-stick ash coating (204), and the non-stick ash coating (204) prevents particles from adhering to the inner wall of the air channel (2) to affect detection accuracy.
8. An air quality sampling detector according to any one of claims 1-4, characterized in that the air channel (2) is provided with a sampling tube (203) extending to the outside of the housing (1), the sampling tube (203) is connected with an air collection head (206), the air collection head (206) is in the shape of an umbrella with a hollow interior, the air inlets (201) are uniformly distributed on the outer surface of the air collection head (206), and the hollow interior of the air collection head (206) is communicated with the detection cavity (22).
9. The air quality sampling detector according to claim 1, wherein the control unit (3) further comprises an alarm module (33), a switch key (34) and a power module (35), and the alarm module (33) sends an alarm prompt when the control unit (3) receives air quality data detected by the sensor (31) and reaches a preset pollution value; the switch key (34) is positioned at the upper shell (11) of the shell (1) and is used for controlling the starting and stopping of the detector; the power module (35) is positioned in the inner cavity (10) of the shell (1) and supplies power for all parts of the detector.
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Families Citing this family (7)
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| CN110487616A (en) * | 2019-08-23 | 2019-11-22 | 中国科学院广州地球化学研究所 | A kind of reaction chamber and VOC sensor of VOC sensor |
| CN110736810B (en) * | 2019-10-29 | 2022-05-27 | 深圳市政研检测技术有限公司 | Rotary adjusting device of head-mounted air quality detection mechanism |
| CN111289314A (en) * | 2020-04-16 | 2020-06-16 | 吕梁学院 | Detection sampling device for severe environment |
| CN111735746B (en) * | 2020-06-10 | 2022-10-04 | 杭州明瑞智能检测科技有限公司 | Handheld oil smoke detector |
| CN112683603B (en) * | 2020-12-08 | 2022-11-29 | 广东广环检测技术有限公司 | Ambient air particulate matter sampling device |
| TWI808395B (en) * | 2021-03-16 | 2023-07-11 | 美商艾諾斯生技股份有限公司 | Gas detection system for gynecological disease detection and detection method using the same |
| CN114019097B (en) * | 2021-10-08 | 2023-08-04 | 利晟（杭州）科技有限公司 | Industrial park air quality automatic monitoring device and system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20160034269A (en) * | 2016-02-29 | 2016-03-29 | 주식회사 엔버스 | Backwashing Method of Gas Sensor Plumbing |
| CN205157418U (en) * | 2015-10-21 | 2016-04-13 | 佛山市南华仪器股份有限公司 | Be used for engine exhaust measuring gas circuit system |
| CN105917208A (en) * | 2013-10-16 | 2016-08-31 | 爱克斯崔里斯科技有限公司 | Aspirated particle detection with various flow modifications |
| CN106370575A (en) * | 2016-10-28 | 2017-02-01 | 杭州克霾环保科技有限公司 | High-precision detector |
| CN106403020A (en) * | 2016-08-29 | 2017-02-15 | 广东遂联智能装备制造有限公司 | Combined type indoor air treatment device and using method thereof |
| CN206670685U (en) * | 2017-04-12 | 2017-11-24 | 北京万生人和科技有限公司 | A kind of air quality sample testing meter |
-
2017
- 2017-04-12 CN CN201710236424.1A patent/CN108692761B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105917208A (en) * | 2013-10-16 | 2016-08-31 | 爱克斯崔里斯科技有限公司 | Aspirated particle detection with various flow modifications |
| CN205157418U (en) * | 2015-10-21 | 2016-04-13 | 佛山市南华仪器股份有限公司 | Be used for engine exhaust measuring gas circuit system |
| KR20160034269A (en) * | 2016-02-29 | 2016-03-29 | 주식회사 엔버스 | Backwashing Method of Gas Sensor Plumbing |
| CN106403020A (en) * | 2016-08-29 | 2017-02-15 | 广东遂联智能装备制造有限公司 | Combined type indoor air treatment device and using method thereof |
| CN106370575A (en) * | 2016-10-28 | 2017-02-01 | 杭州克霾环保科技有限公司 | High-precision detector |
| CN206670685U (en) * | 2017-04-12 | 2017-11-24 | 北京万生人和科技有限公司 | A kind of air quality sample testing meter |
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