CN110925997A - Air quality on-line monitoring micro station based on semiconductor air conditioner - Google Patents
Air quality on-line monitoring micro station based on semiconductor air conditioner Download PDFInfo
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- CN110925997A CN110925997A CN201911360225.7A CN201911360225A CN110925997A CN 110925997 A CN110925997 A CN 110925997A CN 201911360225 A CN201911360225 A CN 201911360225A CN 110925997 A CN110925997 A CN 110925997A
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 46
- 238000012544 monitoring process Methods 0.000 title claims abstract description 27
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 61
- 239000010935 stainless steel Substances 0.000 claims abstract description 61
- 239000007789 gas Substances 0.000 claims abstract description 59
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 claims abstract description 12
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 10
- MGWGWNFMUOTEHG-UHFFFAOYSA-N 4-(3,5-dimethylphenyl)-1,3-thiazol-2-amine Chemical compound CC1=CC(C)=CC(C=2N=C(N)SC=2)=C1 MGWGWNFMUOTEHG-UHFFFAOYSA-N 0.000 claims abstract description 6
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 6
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910002091 carbon monoxide Inorganic materials 0.000 claims abstract description 6
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 5
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 27
- 229910052782 aluminium Inorganic materials 0.000 claims description 27
- 238000005070 sampling Methods 0.000 claims description 24
- 238000004378 air conditioning Methods 0.000 claims description 13
- 230000003993 interaction Effects 0.000 claims description 12
- 238000009413 insulation Methods 0.000 claims description 11
- 229920000742 Cotton Polymers 0.000 claims description 10
- 238000004891 communication Methods 0.000 claims description 8
- 238000009434 installation Methods 0.000 claims description 8
- 238000005057 refrigeration Methods 0.000 claims description 8
- 230000003750 conditioning effect Effects 0.000 claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 3
- 239000003792 electrolyte Substances 0.000 abstract description 7
- 230000002035 prolonged effect Effects 0.000 abstract description 6
- 238000005259 measurement Methods 0.000 abstract description 3
- 239000012855 volatile organic compound Substances 0.000 abstract 2
- 238000010438 heat treatment Methods 0.000 description 7
- 239000003344 environmental pollutant Substances 0.000 description 6
- 231100000719 pollutant Toxicity 0.000 description 6
- 238000001816 cooling Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000012806 monitoring device Methods 0.000 description 3
- 210000003437 trachea Anatomy 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B21/00—Machines, plants or systems, using electric or magnetic effects
- F25B21/02—Machines, plants or systems, using electric or magnetic effects using Peltier effect; using Nernst-Ettinghausen effect
-
- 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
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- Electrochemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Thermal Sciences (AREA)
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- Air Conditioning Control Device (AREA)
Abstract
The invention discloses an air quality on-line monitoring micro station based on a semiconductor air conditioner, which is used for solving the problems that the existing air quality monitoring equipment basically uses an electrochemical sensor to detect the concentration of various polluted gases, the electrochemical sensor is very sensitive to temperature, and the electrolyte of the sensor is dried due to low humidity and high temperature, so that the service life is influenced; the device comprises a stainless steel box body, wherein the top of the stainless steel box body is fixedly connected with the bottom end of an air taking pipe, so that the concentration on-line monitoring of gases such as PM2.5, sulfur dioxide, carbon monoxide, nitrogen dioxide, ozone, VOC (volatile organic compounds), carbon dioxide and the like in the air can be realized; the temperature in the micro-station box body is maintained at a set constant value, so that the situation that the electrolyte of the sensor is dried due to overhigh temperature is prevented, the service life of the electrochemical sensor is prolonged, namely the service life of a system is prolonged, the temperature in the micro-station box body is stable, the temperature drift of the electrochemical sensor is reduced, and the measurement precision is improved.
Description
Technical Field
The invention relates to the field of air monitoring equipment, in particular to an air quality on-line monitoring micro station based on a semiconductor air conditioner.
Background
Conventional air quality monitoring devices basically use electrochemical sensors, and the internal temperature is not adjustable and changes with the temperature change of the external environment. The electrochemical sensor has a limited temperature range, is very sensitive to temperature, is required to keep temperature stable as far as possible, and simultaneously, the electrolyte of the sensor is dried due to low humidity and high temperature, so that the service life of the sensor is greatly shortened;
the air quality monitoring device aims at the problems that the existing air quality monitoring device basically uses an electrochemical sensor to detect the concentration of various polluted gases, the electrochemical sensor is very sensitive to temperature, and the electrolyte of the sensor is dried due to low humidity and high temperature, so that the service life is influenced.
Disclosure of Invention
The invention aims to provide an air quality on-line monitoring micro station based on a semiconductor air conditioner, aiming at solving the problems that the existing air quality monitoring equipment basically uses an electrochemical sensor to detect the concentration of various pollution gases, the electrochemical sensor is very sensitive to temperature, and the electrolyte of the sensor is dried due to low humidity and high temperature, so that the service life is influenced.
The purpose of the invention can be realized by the following technical scheme: an air quality online monitoring micro station based on a semiconductor air conditioner comprises an air path module, an MCU (microprogrammed control Unit) board, a sampling board, a driving board, the semiconductor air conditioner, a human-computer interaction module, a power supply module, a stainless steel box body and a stainless steel movable door;
the air path module comprises a rainproof cap, an air taking pipe, a PM2.5 module, a water-dividing air filter, an air pump, a three-way electromagnetic valve, an aluminum shell air chamber, an air inlet pipe joint and an air outlet pipe joint; a gas sensor is arranged in the aluminum shell gas chamber; a signal conditioning circuit connected with the output end of the gas sensor is arranged on the sampling plate; the signal conditioning circuit is used for amplifying and filtering the signal;
the top of the stainless steel box body is fixedly connected with the bottom end of the gas taking pipe, and a stainless steel movable door is arranged on the stainless steel box body through a hinge; a man-machine interaction module is arranged on the stainless steel movable door; an installation chamber is formed in the stainless steel box body, a PM2.5 module is installed on the rear side wall of the installation chamber through screws, and an air pump is installed on one side of the PM2.5 module through screws; the other side of the PM2.5 module is provided with an aluminum shell air chamber through a screw, a sampling plate is arranged on the aluminum shell air chamber through a copper stud, and an MCU (microprogrammed control Unit) plate is arranged on the sampling plate; the MCU board is provided with a first serial port, a switching value, a temperature sensor, a second serial port, an analog quantity and a third serial port;
a water-dividing air filter is arranged below the air pump; a three-way electromagnetic valve is fixedly installed on one side of the water-diversion air filter through screws, a driving plate is fixedly installed below the three-way electromagnetic valve through screws, an air conditioning chamber is arranged at the bottom of the stainless steel box body, and a semiconductor air conditioner is installed inside the air conditioning chamber; the three-way electromagnetic valve is connected with the air inlet pipe joint;
the power supply module is used for converting 220V alternating current into 24V direct current.
The semiconductor air conditioner comprises an internal fan, an internal radiator, a semiconductor refrigeration sheet, an external radiator and an external fan; the upper end surface of the semiconductor refrigeration sheet is provided with an internal radiator through screws; the upper end surface of the internal radiator is provided with an internal fan through screws; the internal radiator and the internal fan are arranged at the bottom of the mounting chamber; the bottom end face of the semiconductor refrigeration piece is provided with an external radiator through a screw, and the bottom end face of the external radiator is provided with an external fan through a screw.
Preferably, the bottom wall of the air conditioning chamber is provided with an air inlet shutter; air outlet shutters are arranged on the side walls of the two sides of the air conditioning chamber.
Preferably, the human-computer interaction module is a touch screen; the top end of the air intake pipe is provided with a rainproof cover cap.
Preferably, heat insulation cotton is stuck to the inner walls of the stainless steel box body and the stainless steel movable door; and heat insulation cotton is stuck between the internal radiator and the external radiator.
Preferably, the air outlet pipe joint is embedded in the side wall of the stainless steel box body, and a baffle cover used for covering the air outlet pipe joint is mounted on the side wall of the stainless steel box body through a hinge.
Preferably, the PM2.5 module is a laser PM2.5 sensor of SDS; the PM2.5 module is in serial port communication connection with the MCU board through a first serial port.
Preferably, the gas sensor includes a sulfur dioxide sensor, a carbon monoxide sensor, a nitrogen dioxide sensor, an ozone sensor, a VOC sensor, and a carbon dioxide sensor.
Preferably, the gas taking pipe is communicated with the PM2.5 module through a gas pipe; the PM2.5 module is communicated with the water-diversion air filter through an air pipe; the water-dividing air filter is communicated with the air pump through an air pipe; the air pump is communicated with the three-way electromagnetic valve through an air pipe; the three-way electromagnetic valve is communicated with the aluminum shell air chamber through an air pipe, and the aluminum shell air chamber is communicated with the bottom end of the air outlet pipe joint through the air pipe.
Preferably, the sampling plate is connected with the MCU plate through an analog quantity; the MCU board is respectively connected with the air pump and the three-way electromagnetic valve through switching values; the MCU board is connected through a second serial port; the third serial port is connected with a second socket through a wire and a plug; the second jack is an RJ45 jack.
Preferably, the power module comprises a first outlet, an air switch and an AC/DC cabinet power supply; the hollow channel is arranged on one side of the driving plate through a screw; the first socket is connected with the air switch through a wire; the AC/DC shell power supply is arranged on the inner side wall of the stainless steel box body through screws; the first socket is a three-core socket.
Compared with the prior art, the invention has the beneficial effects that:
(1) the invention has reasonable design, compact internal layout and small and exquisite mini-station, and can realize the on-line monitoring of the concentration of gases such as PM2.5, sulfur dioxide, carbon monoxide, nitrogen dioxide, ozone, VOC, carbon dioxide and the like in the air;
(2) the temperature in the micro-station box body is maintained at a set constant value, so that the situation that the electrolyte of the sensor is dried due to overhigh temperature is prevented, the service life of the electrochemical sensor is prolonged, and the service life of a system is prolonged;
(3) the temperature in the micro-station box body is stable, the temperature drift of the electrochemical sensor is reduced, and the measurement precision is improved.
Drawings
In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.
FIG. 1 is a schematic block diagram of the overall architecture of the present invention;
FIG. 2 is a front view of the overall structure of the present invention;
FIG. 3 is a side view of the overall structure of the present invention;
FIG. 4 is a schematic view of the installation of the air intake louver of the present invention;
FIG. 5 is a schematic view of the overall structure of the semiconductor air conditioner of the present invention;
FIG. 6 is a schematic view of an external fan installation according to the present invention;
FIG. 7 is a schematic diagram of concentration calibration according to the present invention;
FIG. 8 is a second schematic diagram of concentration calibration according to the present invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood 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, an air quality on-line monitoring micro station based on a semiconductor air conditioner comprises an air path module, an MCU board 12, a sampling board 11, a driving board 7, a semiconductor air conditioner 8, a human-computer interaction module 14, a power module, a stainless steel box 17 and a stainless steel movable door 16;
the gas circuit module comprises a rainproof cap 1, a gas taking pipe 2, a PM2.5 module 4, a water-dividing gas filter 5, a gas pump 3, a three-way electromagnetic valve 6, an aluminum shell gas chamber 10, a gas inlet pipe joint 26 and a gas outlet pipe joint 25; a gas sensor is arranged in the aluminum shell gas chamber 10; a signal conditioning circuit connected with the output end of the gas sensor is arranged on the sampling plate 11; the signal conditioning circuit is used for amplifying and filtering the signal;
the top of the stainless steel box body 17 is fixedly connected with the bottom end of the gas taking pipe 2, and a stainless steel movable door 16 is arranged on the stainless steel box body 17 through a hinge; a man-machine interaction module 14 is arranged on the stainless steel movable door 16; an installation chamber is arranged in the stainless steel box body 17, a PM2.5 module 4 is installed on the rear side wall of the installation chamber through screws, and an air pump 3 is installed on one side of the PM2.5 module 4 through screws; the other side of the PM2.5 module 4 is provided with an aluminum shell air chamber 10 through a screw, the aluminum shell air chamber 10 is provided with a sampling plate 11 through a copper stud, and the sampling plate 11 is provided with an MCU (microprogrammed control Unit) plate 12; the MCU board 12 is provided with a first serial port 121, a switching value 122, a temperature sensor 123, a second serial port 124, an analog quantity 125 and a third serial port 126;
a water-dividing air filter 5 is arranged below the air pump 3; a three-way electromagnetic valve 6 is fixedly installed on one side of the water-diversion air filter 5 through screws, a driving plate 8 is fixedly installed below the three-way electromagnetic valve 6 through screws, an air conditioning chamber 18 is arranged at the bottom of the stainless steel box body 17, and a semiconductor air conditioner 8 is installed inside the air conditioning chamber 18; the three-way electromagnetic valve 6 is connected with an air inlet pipe joint 26;
the power module includes a first outlet 27, a dry switch 15 and an AC/DC enclosure power supply 13; the hollow opening 15 is arranged on one side of the driving plate 8 through screws; the first socket 27 is connected to the air switch 15 by an electric wire; the AC/DC casing power supply 13 is arranged on the inner side wall of the stainless steel box body 17 through screws; the first socket 27 is a three-core socket; the power supply module is used for converting 220V alternating current into 24V direct current and providing electric energy for the whole stainless steel box body;
the semiconductor air conditioner 8 includes an internal fan 20, an internal radiator 21, a semiconductor cooling fin 22, an external radiator 23, and an external fan 24; the upper end surface of the semiconductor refrigeration sheet 22 is provided with an internal radiator 21 through screws; an inner fan 20 is mounted on the upper end surface of the inner radiator 21 through screws; the internal heat sink 21 and the internal fan 20 are both at the bottom of the mounting chamber; an external radiator 23 is mounted on the bottom end face of the semiconductor refrigeration sheet 22 through screws, and an external fan 24 is mounted on the bottom end face of the external radiator 23 through screws; one side of the semiconductor refrigerating sheet 22 is a refrigerating side, and the other side of the semiconductor refrigerating sheet is a heating side, when the direction of the input voltage is changed, the refrigerating side is changed into the heating side, the heating side is changed into the refrigerating side, the magnitude of the input voltage is changed, and the refrigerating power and the heating power are changed, so that the constant temperature control of refrigerating or heating can be realized by controlling the voltage direction and the magnitude of the semiconductor refrigerating sheet 22; heat insulation cotton is filled between the internal radiator 21 and the external radiator 23 to prevent the heat exchange between the inside and the outside and influence the refrigeration or heating effect;
under normal operation, when the temperature set by the semiconductor air conditioner 8 is higher than the external environment temperature, i.e. in a heating state, the internal heat sink 21 and the internal fan 20 conduct heat, and the external heat sink 23 and the external fan 24 conduct cold; in contrast, when the temperature set by the semiconductor air conditioner 8 is lower than the external ambient temperature, i.e., in the cooling state, the internal heat sink 21 and the internal fan 20 conduct the cooling, and the external heat sink 23 and the external fan 24 conduct the heat; the temperature in the stainless steel box body 17 can be maintained at a constant value through the semiconductor air conditioner 8 and does not change along with the temperature change of the external environment;
the bottom wall of the air conditioning chamber 18 is provided with an air inlet shutter 19; the side walls of the two sides of the air conditioning chamber 18 are both provided with air outlet shutters 9;
the human-computer interaction module 14 is a touch screen; the top end of the air taking pipe 2 is provided with a rainproof cap 1;
heat insulation cotton is stuck on the inner walls of the stainless steel box body 17 and the stainless steel movable door 16; the inner wall is fully distributed with heat insulation cotton to play a role in heat preservation; heat insulation cotton is pasted between the internal radiator 21 and the external radiator 23;
the air outlet pipe joint 25 is embedded on the side wall of the stainless steel box body 17, and a baffle cover 30 for covering the air outlet pipe joint 25 is mounted on the side wall of the stainless steel box body 17 through a hinge;
the PM2.5 module 4 is a laser PM2.5 sensor of SDS 011; the PM2.5 module 4 is in serial communication connection with the MCU board 12 through a first serial port 121;
the gas sensors include a sulfur dioxide sensor 101, a carbon monoxide sensor 102, a nitrogen dioxide sensor 103, an ozone sensor 104, a VOC sensor 105, a carbon dioxide sensor 106, and the like; the carbon monoxide sensor 102 is model number CO-B4; the model of the sulfur dioxide sensor 101 is SO 2-B4; ozone sensor 104 is model OX-B431; the nitrogen dioxide sensor 103 is NO 2-B43F; the VOC sensor 105 model is GM-502B;
the gas taking pipe 2 is communicated with the PM2.5 module 4 through a gas pipe; the PM2.5 module 4 is communicated with the water-diversion air filter 5 through an air pipe; the water diversion air filter 5 is communicated with the air pump 3 through an air pipe; the air pump 3 is communicated with the three-way electromagnetic valve 6 through an air pipe; the three-way electromagnetic valve 6 is communicated with the aluminum shell air chamber 10 through an air pipe, and the aluminum shell air chamber 10 is communicated with the bottom end of the air outlet pipe joint 25 through the air pipe;
the sampling plate 11 is connected with the MCU plate 12 through an analog quantity 125; the MCU board 12 is respectively connected with the air pump 3 and the three-way electromagnetic valve 6 through the switching value 122; the MCU board 12 is connected through a second serial port 124; the third serial port 125 is connected with a second socket 29 through a wire and a plug; the second jack 29 is an RJ45 jack;
the rain-proof cover cap 1 is used for keeping off rain and preventing rainwater from entering the stainless steel box body; the air taking pipe 2 is used for guiding outside air into the stainless steel box body; a PM2.5 module 4 for detecting the content of PM2.5 in the air; a water-separating air filter 5 for drying air; the air pump 3 is used for sucking outside air into the stainless steel box body; the three-way electromagnetic valve 6 is used for selecting an air path, and during calibration, air entering from the air inlet pipe joint 26 is selected to calibrate the concentration of pollutant gas; when the air conditioner works normally, air is selected to enter from the air intake pipe 2; an aluminum shell air chamber 10 for mounting a gas sensor and storing air; an outlet pipe joint 25 for discharging air to the outside;
the MCU board 12 comprises an STM32F407 microprocessor, a storage circuit, an RS485 communication circuit, an RS232 communication circuit, a 5V-to-3.3V power supply circuit and the like; the MCU board controls the air pump 3 and the three-way electromagnetic valve 6 to work, drives and controls the semiconductor air conditioner 8 to work according to the temperature in the sampling box body and the set temperature, meanwhile, processes such as calculation, analysis and the like are carried out on the collected data from the sampling board 11, and then the data are sent to the touch screen and the far-end server through the second serial port 124; the MCU board 12 is fixedly arranged on the sampling board 11 through a pin header and a copper stud;
the drive board 7 is internally provided with an H-bridge topology main circuit consisting of a drive circuit, 2N-channel MOS tubes and 2P-channel MOS tubes, and is used for realizing the control of the direction and the magnitude of voltage and finally realizing the control of the direction and the magnitude of power supply voltage of the semiconductor air conditioner, so that the accurate control of temperature is realized and the requirement of constant temperature is realized;
the human-computer interaction module 14 is in serial port communication with the MCU board 12 to use the functions of gas calibration in the polluted area and pollutant gas concentration display;
the micro station completes the specific implementation mode of the air quality on-line monitoring:
the first step is as follows: controlling and adjusting the temperature in the stainless steel box body:
after the stainless steel box body 17 is powered on to operate, the MCU board 12 drives the semiconductor air conditioner 8 to work through the driving board 7 according to the set temperature (such as 25 ℃) and the acquired temperature deviation, and if the current temperature in the stainless steel box body 17 is higher than the set temperature, a cooling instruction is sent out to perform cooling operation; if the temperature in the stainless steel box body 17 is lower than the set temperature, a temperature-raising instruction is sent out, and temperature-raising operation is carried out until the temperature in the box body reaches the set value;
the second step is that: and (3) calibrating the concentration of pollutant gas in the air:
after the temperature in the stainless steel box 17 reaches a set value and is stable, gas concentration calibration is performed, specifically, standard zero gas (pure N2 gas or pure air) is passed through the stainless steel box 17 through the gas inlet pipe joint 26, then a zero gas calibration starting instruction on the touch screen is clicked, at this time, the three-way electromagnetic valve 6 automatically blocks off a path from a gas pipe branch to the aluminum shell gas chamber 10, the path from the gas inlet pipe joint 26 to the aluminum shell gas chamber 10 is conducted, as shown in fig. 7, the standard zero gas is introduced into the aluminum shell gas chamber 10, and after about 5 minutes, a zero gas calibration finishing instruction on the touch screen is clicked; and then, a standard polluted gas (standard gas) with known concentration is fed into the stainless steel box body 17 through the gas inlet pipe joint 26, a standard gas calibration starting instruction on the touch screen is clicked, the same operation as zero gas calibration is carried out, and after about 5 minutes, a standard gas calibration finishing instruction on the touch screen is clicked to finish the calibration of the polluted gas.
The third step: online monitoring of pollutants in air:
after the two steps are completed, the stainless steel box body 17 can normally work, the three-way electromagnetic valve 6 is in a default state of blocking off the path of the air inlet pipe joint 26 and conducting on the path of the sampling pipe, as shown in fig. 8, under the condition that the temperature in the box body is the set temperature, the air of the external environment enters the stainless steel box body 17 through the air taking pipe 2 under the suction force of the air pump 3 in the stainless steel box body 17, then the particulate matter content in the air is detected through the PM2.5 module 4 and is sent to the MCU board 12, the air then passes through the water diversion air filter 5 to be dried, then the air passes through the air pump 3 and the three-way electromagnetic valve 6 and enters the aluminum shell air chamber 10, the gas sensors on the aluminum shell air chamber 10 respectively detect the corresponding concentration signals of the gas, the concentration signals are sent to the MCU board 12 to be converted into numerical signals after passing, and finally, sending the information to a touch screen for display, sending the information to a server through a network, and after the pollutant concentration monitoring is completed, exhausting the air in the aluminum shell air chamber 10 to the external environment through the air outlet pipe joint 25.
The temperature sensor is DS18B 20;
when the air-conditioning system is used, the air path module sends air into the aluminum shell air chamber 10 provided with the air sensor through the PM2.5 module 4, the water-dividing air filter 5, the air pump 3 and the three-way electromagnetic valve 6 by the air pipe, and finally the air is discharged out of the stainless steel box body 17 from the aluminum shell air chamber 10 through the air pipe and the air outlet pipe joint 25; the sampling board 11 filters and amplifies sampling signals from a gas sensor, and then transmits the sampling signals to the MCU board 12, the MCU board 12 receives analog sampling signals with gas concentration from the sampling board 11, the analog signals are converted into digital signals and transmitted to a human-computer interface for display or transmitted to a local PC (personal computer) end monitoring platform through an RJ45 socket, the MCU board 12 controls the semiconductor air conditioner 8 through the driving board 7 according to the sampled temperature signals and set temperature values at the same time, so that the temperature in the box reaches the set value, the MCU board 12 also controls the three-way electromagnetic valve 6 and the air pump 3, the MCU board 12 carries out information interaction with the human-computer interaction module 14 through serial port communication, the MCU module communicates with the PM2.5 sensor through the serial port communication module, and reads the value of PM 2.5; the power supply module comprises a three-core socket 27, an air switch 15 and an AC/DC shell power supply 13, converts 220V alternating current into 24V direct current and provides electric energy for the whole micro station; the temperature in the stainless steel box body 17 is maintained at a set constant value, so that the situation that the electrolyte of the sensor is dried due to overhigh temperature is prevented, the service life of the electrochemical sensor is prolonged, namely the service life of a system is prolonged, the temperature drift of the electrochemical sensor is reduced, the measurement precision is improved, meanwhile, the system can realize real-time online monitoring on various pollutants in the air, and sends data to a server; heat insulation cotton is stuck on the inner walls of the stainless steel box body 17 and the stainless steel movable door 16; the heat insulation cotton is arranged to play a role in heat insulation; get the top of trachea 2 and install rain-proof block 1, through setting up rain-proof block 1, prevent that the rainwater from getting into in the stainless steel box 17 through getting the trachea.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise forms disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (10)
1. An air quality on-line monitoring micro station based on a semiconductor air conditioner is characterized by comprising an air path module, an MCU (microprogrammed control unit) board (12), a sampling board (11), a driving board (7), the semiconductor air conditioner (8), a man-machine interaction module (14), a power supply module, a stainless steel box body (17) and a stainless steel movable door (16);
the air path module comprises a rainproof cover cap (1), an air taking pipe (2), a PM2.5 module (4), a water-dividing air filter (5), an air pump (3), a three-way electromagnetic valve (6), an aluminum shell air chamber (10), an air inlet pipe joint (26) and an air outlet pipe joint (25); a gas sensor is arranged in the aluminum shell gas chamber (10); a signal conditioning circuit connected with the output end of the gas sensor is arranged on the sampling plate (11); the signal conditioning circuit is used for amplifying and filtering the signal;
the top of the stainless steel box body (17) is fixedly connected with the bottom end of the gas taking pipe (2), and a stainless steel movable door (16) is arranged on the stainless steel box body (17) through a hinge; a man-machine interaction module (14) is arranged on the stainless steel movable door (16); an installation chamber is formed in the stainless steel box body (17), a PM2.5 module (4) is installed on the rear side wall of the installation chamber through screws, and an air pump (3) is installed on one side of the PM2.5 module (4) through screws; an aluminum shell air chamber (10) is arranged on the other side of the PM2.5 module (4) through screws, a sampling plate (11) is arranged on the aluminum shell air chamber (10) through a copper stud, and an MCU (microprogrammed control Unit) plate (12) is arranged on the sampling plate (11); the MCU board (12) is provided with a first serial port (121), a switching value (122), a temperature sensor (123), a second serial port (124), an analog quantity (125) and a third serial port (126);
a water-dividing air filter (5) is arranged below the air pump (3); a three-way electromagnetic valve (6) is fixedly installed on one side of the water-diversion air filter (5) through screws, a driving plate (8) is fixedly installed below the three-way electromagnetic valve (6) through screws, an air conditioning chamber (18) is formed in the bottom of the stainless steel box body (17), and a semiconductor air conditioner (8) is installed inside the air conditioning chamber (18); the three-way electromagnetic valve (6) is connected with an air inlet pipe joint (26);
the power supply module is used for converting 220V alternating current into 24V direct current;
the semiconductor air conditioner (8) comprises an internal fan (20), an internal radiator (21), a semiconductor refrigerating sheet (22), an external radiator (23) and an external fan (24); the upper end face of the semiconductor refrigeration sheet (22) is provided with an internal radiator (21) through a screw; an inner fan (20) is installed on the upper end surface of the inner radiator (21) through screws; the internal radiator (21) and the internal fan (20) are arranged at the bottom of the mounting chamber; an external radiator (23) is installed on the bottom end face of the semiconductor refrigeration sheet (22) through screws, and an external fan (24) is installed on the bottom end face of the external radiator (23) through screws.
2. The on-line air quality monitoring micro station based on the semiconductor air conditioner is characterized in that an air inlet shutter (19) is arranged on the bottom wall of the air conditioning chamber (18); air outlet shutters (9) are arranged on the side walls of the two sides of the air conditioning chamber (18).
3. The on-line air quality monitoring micro station based on the semiconductor air conditioner is characterized in that the human-computer interaction module (14) is a touch screen; the top end of the air intake pipe (2) is provided with a rain-proof cap (1).
4. The on-line air quality monitoring micro station based on the semiconductor air conditioner is characterized in that heat insulation cotton is stuck to the inner walls of the stainless steel box body (17) and the stainless steel movable door (16); heat insulation cotton is pasted between the inner radiator (21) and the outer radiator (23).
5. The on-line air quality monitoring micro station based on the semiconductor air conditioner is characterized in that the air outlet pipe joint (25) is embedded on the side wall of the stainless steel box body (17), and a stop cover (30) used for covering the air outlet pipe joint (25) is mounted on the side wall of the stainless steel box body (17) through a hinge.
6. The on-line air quality monitoring micro station based on the semiconductor air conditioner is characterized in that the PM2.5 module (4) is a laser PM2.5 sensor of SDS 011; the PM2.5 module (4) is in serial communication connection with the MCU board (12) through a first serial port (121).
7. The semiconductor air conditioner based air quality on-line monitoring micro station as claimed in claim 1, wherein the gas sensor comprises a sulfur dioxide sensor (101), a carbon monoxide sensor (102), a nitrogen dioxide sensor (103), an ozone sensor (104), a VOC sensor (105) and a carbon dioxide sensor (106).
8. The on-line air quality monitoring micro station based on the semiconductor air conditioner is characterized in that the air taking pipe (2) is communicated with the PM2.5 module (4) through an air pipe; the PM2.5 module (4) is communicated with the water-diversion air filter (5) through an air pipe; the water-dividing air filter (5) is communicated with the air pump (3) through an air pipe; the air pump (3) is communicated with the three-way electromagnetic valve (6) through an air pipe; the three-way electromagnetic valve (6) is communicated with the aluminum shell air chamber (10) through an air pipe, and the aluminum shell air chamber (10) is communicated with the bottom end of the air outlet pipe joint (25) through the air pipe.
9. The on-line air quality monitoring micro station based on the semiconductor air conditioner is characterized in that the sampling board (11) is connected with the MCU board (12) through an analog quantity (125); the MCU board (12) is respectively connected with the air pump (3) and the three-way electromagnetic valve (6) through a switching value (122); the MCU board (12) is connected through a second serial port (124); the third serial port (125) is connected with a second socket (29) through a wire and a plug; the second jack (29) is an RJ45 jack.
10. The on-line air quality monitoring micro station based on the semiconductor air conditioner as claimed in claim 1, wherein the power supply module comprises a first socket (27), an air switch (15) and an AC/DC cabinet power supply (13); the air switch (15) is arranged on one side of the driving plate (8) through a screw; the first socket (27) is connected with the air switch (15) through an electric wire; the AC/DC shell power supply (13) is arranged on the inner side wall of the stainless steel box body (17) through screws; the first socket (27) is a three-core socket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911360225.7A CN110925997A (en) | 2019-12-25 | 2019-12-25 | Air quality on-line monitoring micro station based on semiconductor air conditioner |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911360225.7A CN110925997A (en) | 2019-12-25 | 2019-12-25 | Air quality on-line monitoring micro station based on semiconductor air conditioner |
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| Publication Number | Publication Date |
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| CN110925997A true CN110925997A (en) | 2020-03-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911360225.7A Withdrawn CN110925997A (en) | 2019-12-25 | 2019-12-25 | Air quality on-line monitoring micro station based on semiconductor air conditioner |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113532521A (en) * | 2021-07-08 | 2021-10-22 | 国网福建省电力有限公司检修分公司 | Novel extra-high voltage cable insulation material operation state acquisition terminal |
-
2019
- 2019-12-25 CN CN201911360225.7A patent/CN110925997A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113532521A (en) * | 2021-07-08 | 2021-10-22 | 国网福建省电力有限公司检修分公司 | Novel extra-high voltage cable insulation material operation state acquisition terminal |
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Application publication date: 20200327 |