CN110553962A - Indoor air quality monitoring and purifying system - Google Patents

Abstract

The invention relates to an indoor air quality monitoring and purification system, comprising an air quality monitoring unit, a signal conversion unit and an air purification unit; the air quality monitoring unit includes a PM2.5 sensor, a carbon dioxide sensor, a formaldehyde sensor and a TVOC sensor, for Real-time monitoring of the air quality index inside the classroom; the processing core of the signal conversion unit is the use of single-chip microcomputer technology, which is used to display the induction results of the sensors in the air quality monitoring unit on the LCD display screen through digital-to-analog conversion; the air purification unit There are primary filter, activated carbon layer 1, negative ion generating layer, microbial oxygen supply device, activated carbon layer 2 and HEPA ultrafiltration layer inside to improve the indoor air quality. The invention monitors the indoor air in real time, not only can effectively purify the indoor air, but also can reduce the carbon dioxide concentration in the room by using microorganism oxygen supply, so as to create a good living environment for human beings.

Description

An indoor air quality monitoring and purification system

technical field

The invention relates to the field of indoor air monitoring and purification, in particular to an indoor air quality monitoring and purification system.

Background technique

With the continuous acceleration of my country's industrialization process and the rapid development of social economy, the indoor air quality is also facing a great test when the outdoor air pollution situation is severe. Especially the time that modern people live and work in the indoor environment has reached 80% to 90% of the whole day. With the generalization of family house decoration and the seriousness of outdoor air pollution, people are becoming more and more concerned about the indoor air quality. Pay attention to.

In order to prevent and control indoor environmental pollution caused by environmental air pollution, construction and decoration materials, human activities, etc., and to protect people's health, on November 19, 2002, the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, the Ministry of Health, and the National Environmental The General Administration of Protection jointly approved the "Indoor Air Quality Standard", which requires that indoor air should be non-toxic, harmless, and have no abnormal smell. There are 19 indoor air quality parameters. made a regulation.

Therefore, in order to protect the health of indoor personnel, it is necessary to monitor and purify the air inside in real time, while the existing air purifiers and fresh air fans on the market often exchange indoor air with external air or reduce indoor air by other means. The concentration of pollutants is moderate, but there are still problems such as hypoxia caused by high carbon dioxide concentration.

Chlorella is the earliest single-cell green algae on the earth. Its photosynthetic efficiency is more than ten times that of other plants. It can efficiently release oxygen while absorbing carbon dioxide in the air, which can improve indoor air quality without producing other secondary pollutants. Both energy saving and environmental protection.

Therefore, the present invention uses microbial oxygen supply to propose an indoor air quality monitoring and purification system.

Contents of the invention

The object of the present invention is to provide an indoor air quality monitoring and purification system to solve the problems existing in the above-mentioned background technology.

In order to achieve the stated purpose, the present invention specifically adopts the following technical solutions:

An indoor air quality monitoring and purification system, including an air quality monitoring unit, a signal conversion unit and an air purification unit; the air quality monitoring unit includes a PM2.5 sensor, a carbon dioxide sensor, a formaldehyde sensor and a TVOC sensor for real-time monitoring of classrooms Internal air quality indicators; the processing core of the signal conversion unit is to adopt single-chip microcomputer technology, which is used to display the induction results of the sensors in the air quality monitoring unit on the LCD display screen through digital-to-analog conversion; the PM2.5 sensor, carbon dioxide The sensor, the formaldehyde sensor and the TVOC sensor are respectively connected to the signal conversion unit; the air purification unit is equipped with a preliminary filter, an activated carbon layer 1, an anion generating layer, a microbial oxygen supply device, an activated carbon layer 2 and a HEPA ultrafiltration layer. To improve indoor air quality.

The signal conversion unit includes a power supply for converting digital signals back to analog signals, a signal amplification circuit for amplifying sensor output signals, an A/D converter for converting amplified analog signals into digital signals, and a single-chip microcomputer for signal core processing , D/A converter, and amplified output circuit and man-machine interface for driving the regulating valve.

Preferably, the inside of the air monitoring unit is provided with a blower and a blower silencer, and the indoor air reaches the air monitoring unit through the air inlet under the action of the blower, and is transported to the primary filter, the activated carbon layer 1, and the anion generating layer in sequence after being monitored. , microbial oxygen supply device, HEPA ultrafiltration layer and activated carbon layer 2.

Preferably, the microbial oxygen supply device inside the air purification unit is connected with the anion generating layer through a check valve. The microbial oxygen supply device inside the air purification unit adopts a circulation pipeline design, which can cultivate microorganisms such as chlorella. At the same time, oxygen is produced efficiently, and the photobiological reaction pipeline and the activated carbon layer 2 are connected through an automatic exhaust valve.

Preferably, a temperature sensor, a pH sensor, and a light intensity sensor are provided inside the photobioreaction pipeline of the microbial oxygen supply device, and the sensor is connected to a signal amplification circuit; the top of the photobioreaction pipeline is provided with a light source, and the bottom is provided with a heat source , and the light source and heat source are connected to the amplifier output circuit.

Preferably, it also includes inlet and outlet pipes and air inlet and outlet ports, the liquid inlet pipe is arranged at the upper end of one side of the photobioreaction pipe, the liquid outlet pipe is arranged at the lower end of the other side of the photobioreaction pipe, and the inlet of the liquid inlet pipe Both the liquid port and the liquid outlet of the liquid outlet pipeline are equipped with stop valves;

Preferably, it also includes a protective casing, the outside of the air quality monitoring unit and the signal conversion unit are opaque casings, and the door can be opened if the system needs maintenance, and the outside of the photobiological reaction pipeline of the microbial oxygen supply device is protected by a transparent structure shell.

Preferably, it also includes a brakeable universal wheel, and the brakeable universal wheel is arranged at the bottom of the protective shell.

Compared with the prior art, the beneficial effects of the present invention are as follows:

1. An indoor air quality monitoring and purification system with simple structure, energy saving, environmental protection and high degree of intelligence.

2. Compared with the existing air purification systems on the market, an indoor air quality monitoring and purification system can not only improve the air quality inside the classroom through the air purification unit, but also effectively reduce the indoor carbon dioxide concentration by using microbial oxygen supply. Real-time monitoring of indoor air quality to create a good living environment for human beings.

3. Silent water pump silencer and air compressor silencer can effectively eliminate noise, so that an indoor air quality monitoring and purification system can always maintain low decibels during work, without affecting normal indoor activities of humans.

Description of drawings

Fig. 1 is a three-dimensional schematic diagram of a preferred example of an indoor air quality monitoring and purification system according to the present invention.

Figure 2 is a schematic diagram of the physical structure of the microbial oxygen supply device

Fig. 3 is a structural schematic diagram of the activated carbon layer, the negative ion generating layer, and the activated carbon layer 2 of the air quality monitoring unit, the signal conversion unit and the air purification unit.

Figure 4 is a functional block diagram of the air quality monitoring unit.

Among them, the names corresponding to the reference signs are:

1-Air quality detection unit, 11-Blower, 12-Blower silencer, 13-PM2.5 sensor, 14-Carbon dioxide sensor, 15-Formaldehyde sensor, 16-TVOC sensor, 2-Signal conversion unit, 21-LCD display , 22-air inlet, 23-air outlet, 3-air purification unit, 31-preliminary filter, 32-activated carbon layer 1, 33-negative ion generating layer, 34-microbial oxygen supply device, 341-check valve, 342 -Photobiological reaction pipeline, 343-silent water pump, 344-automatic exhaust valve, 345-inlet pipeline, 3451-stop valve 1, 346-liquid outlet pipeline, 3461-stop valve 2, 347-light source, 348-heat source, 349-pH sensor, 3410-temperature sensor, 3411-light intensity sensor, 35-activated carbon layer 2, 36-HEPA ultrafiltration layer, 4-brake universal wheel.

Detailed ways

In the following, with reference to the drawings and preferred embodiments, the specific implementation, structure, features and functions of an indoor air quality monitoring and purification system according to the present invention will be described in detail as follows.

In combination with Figures 1-4, an indoor air quality monitoring and purification system includes an air quality monitoring unit, a signal conversion unit and an air purification unit; the air quality monitoring unit includes a PM2.5 sensor, a carbon dioxide sensor, a formaldehyde sensor and a TVOC sensor , for real-time monitoring of the air quality indicators inside the classroom; the processing core of the signal conversion unit is the use of single-chip microcomputer technology, which is used to display the induction results of the sensors in the air quality monitoring unit on the LCD display through digital-to-analog conversion; The PM2.5 sensor, the carbon dioxide sensor, the formaldehyde sensor and the TVOC sensor are respectively connected to the signal conversion unit; the air purification unit is equipped with a primary filter, an activated carbon layer 1, an anion generating layer, a microbial oxygen supply device, an activated carbon layer 2 and HEPA ultrafiltration layer for improving indoor air quality.

The signal conversion unit includes a power supply for converting digital signals back to analog signals, a signal amplification circuit for amplifying sensor output signals, an A/D converter for converting amplified analog signals into digital signals, and a single-chip microcomputer for signal core processing , D/A converter, and amplified output circuit and man-machine interface for driving the regulating valve.

Preferably, the inside of the air monitoring unit is provided with a blower and a blower silencer, and the indoor air reaches the air monitoring unit through the air inlet under the action of the blower, and is transported to the primary filter, the activated carbon layer 1, and the anion generating layer in sequence after being monitored. , microbial oxygen supply device, HEPA ultrafiltration layer and activated carbon layer 2.

Preferably, the microbial oxygen supply device inside the air purification unit is connected with the anion generating layer through a check valve. The microbial oxygen supply device inside the air purification unit adopts a circulation pipeline design, which can cultivate microorganisms such as chlorella. At the same time, oxygen is produced efficiently, and the photobiological reaction pipeline and the activated carbon layer 2 are connected through an automatic exhaust valve.

Preferably, a temperature sensor, a pH sensor, and a light intensity sensor are provided inside the photobioreaction pipeline of the microbial oxygen supply device, and the sensor is connected to a signal amplification circuit; the top of the photobioreaction pipeline is provided with a light source, and the bottom is provided with a heat source , and the light source and heat source are connected to the amplifier output circuit.

Preferably, it also includes liquid inlet and outlet pipes and gas inlet and outlet ports. The liquid inlet pipe is arranged at the upper end of one side of the photobiological reaction pipe, the liquid outlet pipe is arranged at the lower end of the other side of the photobiological reaction pipe, and the liquid inlet of the liquid inlet pipe and the liquid outlet of the liquid outlet pipe are equipped with stop valves; The air inlet is located on one side of the box body of the air quality monitoring unit, and the air outlet is arranged on one side of the activated carbon layer 2 .

Preferably, it also includes a protective casing, the outside of the air quality monitoring unit and the signal conversion unit are opaque casings, and the door can be opened if the system needs maintenance, and the outside of the photobiological reaction pipeline of the microbial oxygen supply device is protected by a transparent structure shell.

Preferably, it also includes a brakeable universal wheel, and the brakeable universal wheel is arranged at the bottom of the protective shell.

The working mode of the present invention is:

The indoor air first enters the air quality monitoring unit under the action of the blower, and the sensor inputs the analog signal of the air quality sensing result into the signal conversion unit, and the sensing result is finally displayed on the LCD display using the single-chip microcomputer technology. The monitored air enters the air purification unit and passes through the activated carbon layer, negative ion generating layer, microbial oxygen supply device and activated carbon layer 2 in sequence, and the purified air returns to the indoor environment through the air outlet.

More specific ways of working include:

The PM2.5 sensor, carbon dioxide sensor, formaldehyde sensor and TVOC sensor of the air quality monitoring unit input the air quality sensing results to the signal conversion unit through the signal amplification circuit, and the A/D converter converts the amplified analog signal into a digital signal, The single-chip microcomputer performs core processing on the signal, and the D/A converter converts the digital signal back to an analog signal. The operator can set the regulation index through the man-machine interface, and the amplifying output circuit will drive the relevant regulating valve according to the analog signal.

The blower sends the air passing through the air quality monitoring unit and the signal conversion unit to the air purification unit. First, large particles, dust, smoke and other substances in the air are intercepted by the primary filter, and the air after primary filtration reaches the activated carbon layer 1. Under the action of activated carbon, formaldehyde, xylene and other substances in the air and some odors are absorbed. The negative ion generating layer will produce a small amount of ozone while producing a large amount of negative ions. The combination of the two can cause bacteria and viruses in the air to change their structure or transfer energy, leading to their death. In addition, negatively charged negative ions can also conduct electrode neutralization with positively charged smoke dust floating in the air, allowing them to deposit naturally.

The air passing through the negative ion generating layer enters the microbial oxygen supply device through the pipeline, and a check valve is installed in the middle of the pipeline to prevent the algae liquid from entering other structures of the air purification unit during the circulation process.

In the microbial oxygen supply device, through the control of the silent water pump, the air circulates with the chlorella in the circulation pipeline, and the efficient photosynthesis of the chlorella is used to absorb the carbon dioxide in the air and generate oxygen at the same time. Not only that, the algae liquid It can also absorb hydrophilic PM2.5 to purify the indoor air.

Among them, in order to ensure the high growth efficiency of chlorella, the microbial oxygen supply device inside the air purification unit adopts a circulation pipeline design, and the circulation of chlorella in the photobiological reaction pipeline can effectively prevent the growth of chlorella due to adhesion. Blocking the light source reduces the photosynthetic efficiency, so that it can effectively reduce the high concentration of carbon dioxide in the room while efficiently producing oxygen.

The inside of the photobiological reaction pipeline of the microbial oxygen supply device is provided with a temperature sensor, a pH sensor and a light intensity sensor, and the sensor is connected to a signal amplification circuit, and the index of the chlorella growth environment is displayed on the LCD display screen by using single-chip microcomputer technology; The bottom of the photobiological reaction pipeline is provided with a light source, and the top is provided with a heat source. Both the light source and the heat source are connected to the amplification output circuit. The operator can control the opening and closing conditions of the light source and the heat source through the man-machine interface, so that the chlorella is in a suitable growth state. Environment.

Among them, when the device is not working for a long time and causes the death of chlorella due to deterioration of growth conditions, the stop valve of the liquid outlet pipeline can be opened to discharge the chlorella liquid, after the discharge is completed, the stop valve is closed, and then the liquid inlet pipeline is opened. Put new chlorella liquid into the shut-off valve.

The air treated by the microbial oxygen supply device reaches the activated carbon layer 2 through the automatic exhaust valve. The activated carbon can absorb the taste of the algae liquid carried by the air through the microbial oxygen supply layer. Then, the HEPA ultrafiltration layer will intercept the algae liquid that has not been absorbed by the algae liquid. Hydrophobic PM2.5. In this example, the H11 grade filter screen can be selected, and its filtration rate to PM2.5 can reach 95%, and the filtration rate to other particles can reach 100%. Finally, the purified air is exhausted into the indoor environment through the air outlet.

Among them, the primary filter, activated carbon layer 1, negative ion generating layer, activated carbon layer 2 and HEPA ultrafiltration layer are all detachable design of pulling, which is convenient for inspection and maintenance. At the same time, the negative ion generating layer is designed to be sealed, which can prevent the generated ozone from leaking out and endangering human health.

Wherein, the middle part of the protective shell is a transparent structure, which can be made of PC material. The chlorella can make full use of the light in the transparent structure, and at the same time increase the ornamental value, and it is also convenient for the operator to observe the growth of the chlorella.

Among them, the brakeable universal wheel is designed to facilitate the movement and fixation of an indoor air quality monitoring and purification system.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (8)

1. A kind of indoor air quality monitoring and purification system, it is characterized in that: comprise air quality monitoring unit, signal conversion unit and air purification unit; Described air quality monitoring unit comprises PM2.5 sensor, carbon dioxide sensor, formaldehyde sensor and TVOC sensor , for real-time monitoring of the air quality indicators inside the classroom; the processing core of the signal conversion unit is the use of single-chip microcomputer technology, which is used to display the induction results of the sensors in the air quality monitoring unit on the LCD display through digital-to-analog conversion; The PM2.5 sensor, the carbon dioxide sensor, the formaldehyde sensor and the TVOC sensor are respectively connected to the signal conversion unit; the air purification unit is equipped with a primary filter, an activated carbon layer 1, an anion generating layer, a microbial oxygen supply device, an activated carbon layer 2 and HEPA ultrafiltration layer for improving indoor air quality. 2. A kind of indoor air quality monitoring and purification system according to claim 1, characterized in that: said signal conversion unit includes a power supply for converting digital signals back to analog signals, a signal amplifying circuit for amplifying sensor output signals, A/D converter that converts the amplified analog signal into digital signal, single chip microcomputer for signal core processing, D/A converter, amplified output circuit and man-machine interface for driving the regulating valve. 3. A kind of indoor air quality monitoring and purification system according to claim 1, characterized in that: said air monitoring unit is provided with a blower and a blower silencer inside, and the indoor air reaches the air through the air inlet under the action of the blower. The monitoring unit is sent to the primary filter, activated carbon layer 1, anion generating layer, microbial oxygen supply device, HEPA ultrafiltration layer and activated carbon layer 2 in sequence after being monitored. 4. A kind of indoor air quality monitoring and purification system according to claim 1, characterized in that: the microbial oxygen supply device inside the air purification unit is connected with the anion generating layer by a check valve, and the microbial oxygen supply The device adopts a circulation pipeline design, which can cultivate microorganisms such as chlorella. Under the action of the silent water pump, the chlorella circulates in the photobiological reaction pipeline, and efficiently produces oxygen while absorbing carbon dioxide in the air, and the photobiological reaction pipeline It is connected with the activated carbon layer 2 through an automatic exhaust valve. 5. A kind of indoor air quality monitoring and purification system according to claim 4, it is characterized in that: the photobiological reaction pipeline of described microbial oxygen supply device is provided with temperature sensor, pH sensor and light intensity sensor inside, and sensor is connected Signal amplification circuit; the top of the photobiological reaction pipeline is provided with a light source, and the bottom is provided with a heat source, and the light source and heat source are both connected to the amplification output circuit. 6. A kind of indoor air quality monitoring and purification system according to claim 1, characterized in that: it also includes inlet and outlet pipes and inlet and outlet ports, the inlet pipe is set at the upper end of one side of the photobiological reaction pipe, and the outlet The liquid pipeline is arranged at the lower end of the other side of the photobiological reaction pipeline, and the liquid inlet of the liquid inlet pipeline and the liquid outlet of the liquid outlet pipeline are equipped with stop valves; the air inlet is located on the side of the box of the air quality monitoring unit, The gas outlet is located on one side of the activated carbon layer 2 . 7. An indoor air quality monitoring and purification system according to claim 1, characterized in that: it also includes a protective shell, the outside of the air quality monitoring unit and the signal conversion unit are opaque shells, which can be opened if the system needs maintenance The box door, the outside of the photobiological reaction pipeline of the microbial oxygen supply device is a protective shell with a transparent structure. 8. The indoor air quality monitoring and purification system according to claim 1, further comprising a brakeable universal wheel, and the brakeable universal wheel is arranged at the bottom of the protective casing.