CN205783449U - A kind of based on STM8 Intelligent Single-Chip Based control type plasma air purifier - Google Patents

Abstract

The utility model provides an intelligent control plasma air purifier based on STM8 single-chip microcomputer. An air inlet is arranged on one side of the casing, an air outlet is arranged on the other side, and a fan is arranged in the casing at the air inlet. There is also a fan inside the casing. A charcoal filter adsorption layer, a plasma generation layer and an ozone treatment layer are arranged in sequence, and a switch button, a display device and a wind speed control button are arranged on the top of the casing, an STM8 single-chip intelligent control device and a pulse power supply are arranged on the bottom of the casing, and a fan is installed below the fan. There are air quality sensors and temperature sensors, and the air quality sensors, temperature sensors, switch buttons, display devices and wind speed control buttons are all connected to the STM8 single-chip intelligent control device. The utility model can detect temperature and air quality, kill viruses and bacteria, decompose harmful chemical gases such as formaldehyde and benzene, has small volume and long service life, and is widely used in public places such as factories and hospitals.

Description

An intelligent control plasma air purifier based on STM8 single chip microcomputer

technical field

The utility model relates to an air purifier, in particular to an intelligent control type plasma air purifier based on an STM8 single-chip microcomputer.

Background technique

With the development of social economy, the problem of air pollution has become increasingly prominent, especially in recent years, air smog and indoor air pollution have seriously threatened the health of human beings. Energy-saving and environment-friendly plasma air purifiers are particularly necessary.

Existing plasma air purifiers can remove harmful substances in the air. However, when the high voltage of the positive and negative plates is discharged, the oxygen ions generated will combine with the oxygen molecules in the air to produce ozone, which is harmful to the human respiratory tract. For different types of air quality pollutants, the existing plasma air purifiers all use the same purification power, which cannot achieve the best air purification efficiency; cannot automatically adjust the fan speed according to the air quality; cannot display the current air quality and temperature .

The document "Development of Corona Discharge Plasma Catalytic Indoor Air Purifier" involves an indoor air purifier based on corona discharge dust removal and plasma discharge catalysis as the main principle. However, compared with the utility model, this purifier has no display device and cannot display reference information such as current air quality, temperature, fan speed, etc., which is not smart enough.

Chinese patent: a plasma air purifier (CN 105091120 A), a high-voltage electrostatic plasma air purifier and its purification method (CN 105091120 A) all relate to a high-voltage ionization plasma air purifier, similar to the utility model, purifying The interior of the device contains a charcoal adsorption filter layer, a plasma generation layer, and an ozone treatment layer. Although it has a good purification effect, the utility model has the advantage that it can automatically adjust the power supply by controlling the duty ratio of the PWM wave through a single-chip microcomputer according to the actual situation of the air quality. The output voltage not only has the ideal purification effect, but also saves energy.

Chinese Patent: A Plasma Air Purifier (CN 204063331U) relates to a plasma air purifier containing a humidifier. The purifier is provided with a HEPA dust filter and is designed with an anti-allergic layer to remove allergens and other substances. There is also a filter mesh sealing ring around, which can improve the air tightness and purification efficiency of the purifier. The disadvantage of this purifier is that after the high voltage breaks down the air to generate plasma, the oxygen ions combine with the oxygen molecules in the air to produce ozone which is harmful to the human body. Compared with the above-mentioned patents, the utility model is provided with an ozone treatment layer, uses an ultraviolet lamp as a light source, and TiO2 as a photocatalyst, has a good decomposition effect on ozone, and further improves the purification effect.

Literature: A research on corona discharge and photocatalysis synergistic purification of indoor air (Adaptive unscented Kalman filter of fuzzy logic interacting multiple model, FLIMM-AUKF). The plasma generating device described in this article adopts a pin-plate structure, which discharges at the tip, and the generated plasma concentration is not high, and the purification effect is not ideal. And the nickel-cadmium metal band that the utility model adopts is to do corona discharge along the periphery of the electrode, the plasma density that produces is high, and purification effect is good.

Contents of the invention

The purpose of this utility model is to provide an intelligent control plasma air purifier based on STM8 single-chip microcomputer, which has the characteristics of adjustable wind speed, ozone removal, purifier power adjustment according to air quality conditions, and air quality condition display. It can not only absorb dust particles in the air, but also eliminate bacteria and viruses in the air, and effectively remove formaldehyde and stupid chemical pollutants produced after interior decoration.

The purpose of this utility model is achieved in this way: one side of the housing is provided with an air inlet, the other side is provided with an air outlet, a fan is arranged in the housing at the air inlet, and a charcoal filter adsorption layer is arranged in turn in the housing , Plasma generation layer and ozone treatment layer, switch button, display device and wind speed control button are set on the top of the shell, STM8 single-chip intelligent control device and pulse power supply are set on the bottom of the shell, and air quality sensor and temperature sensor are set under the fan , the air quality sensor, temperature sensor, switch button, display device and wind speed control button are all connected with the STM8 single-chip intelligent control device.

The utility model also includes such structural features:

1. The charcoal filter adsorption layer is located on the air inlet side, the ozone treatment layer is located on the air outlet side, and the plasma generation layer is located between the charcoal filter adsorption layer and the ozone treatment layer.

2. The positive plate of the plasma generation layer is composed of nickel-chromium alloy strips, the negative plate is composed of aluminum plates coated with TIO2, the positive plates are connected by copper wires, the negative plates are connected by studs, and the positive and negative plates are made of nylon. column connection. The connection mode between the pole plates is simple and convenient. The purifier can be disassembled freely, which is convenient for maintenance and cleaning.

3. The ozone treatment layer uses an ultraviolet lamp as a light source, and contains optical fiber bundles and nano photocatalysts.

4. The STM8 single-chip intelligent control device combined with the optimization algorithm can generate PWM waves with different frequencies and different duty ratios to control the output voltage of the fan according to the air quality detected by the air quality sensor and the temperature sensor, and adjust the fan speed.

Compared with the prior art, the beneficial effect of the utility model is: the utility model aims at the disadvantages that the traditional plasma air purifier cannot automatically adjust the speed of the fan according to the air quality, cannot automatically adjust the pulse power supply voltage, and cannot completely remove ozone. The STM8 single-chip microcomputer is the core of the control device. The control device combines the optimization algorithm to transmit the information sensed by the temperature and air quality sensor to the STM8 single-chip microcomputer system. The plasma concentration contact surface is the largest, fully purifying the air; at the same time, the control display system displays the temperature and air quality; the utility model not only has a charcoal adsorption filter layer and a plasma generation layer, but also has an ozone treatment layer, which is based on photocatalysis at room temperature Oxidation mechanism, using nano photocatalyst (such as TiO2), optical fiber bundle as carrier, and ultraviolet lamp as light source to cooperate to maximize the decomposition of photocatalyst, remove ozone to the greatest extent, and improve air purification efficiency. The utility model can detect temperature and air quality, kill viruses and bacteria, decompose harmful chemical gases such as formaldehyde and benzene, has small volume and long service life, and is widely used in public places such as factories and hospitals.

Description of drawings

Fig. 1 is the structural representation of the utility model.

detailed description

Below in conjunction with accompanying drawing and specific embodiment the utility model is described in further detail.

In conjunction with Fig. 1, the utility model includes a housing 12, and an air quality sensor 6 inside the housing, a temperature sensor 7, a fan (fan) 5, a switch 2, a moving wheel 10, a control button 3, a display device 1, and an STM8 single-chip microcomputer intelligence Control device 9, pulse power supply 15, high voltage pack 11, charcoal adsorption filter layer 8, ozone treatment layer 14, plasma generation layer 4, power cord 13 and air inlet, air outlet, the air inlet is located at the leftmost side of the box body, so The air outlet is located on the far right side of the box, the air inlet is provided with a fan, the air quality sensor and the temperature sensor are arranged under the fan, the STM8 single chip microcomputer intelligent control device is located at the bottom of the box, and the moving wheel is located at the box The lower end of the body and the housing are provided with an intelligent control device, a pulse power supply, and a high-voltage package; the pulse power supply and the high-voltage package are located inside the intelligent control device, and the display device is located at the top of the box, that is, a display screen is provided above the housing. The switch button and the wind speed adjustment button are located on the top of the box and on the same side as the display device. The inside of the shell is provided with a charcoal adsorption filter layer, a plasma generation layer, and an ozone treatment layer; the shell of the shell is connected with a power plug.

The intelligent control device uses an STM8 single-chip microcomputer as the main control device, and the STM8 single-chip microcomputer combined with an optimization algorithm can generate PWM waves with different frequencies and different duty ratios according to air quality conditions, thereby adjusting the amplitude and frequency of the pulse power supply. The display device can display the current plasma concentration, temperature, and air quality conditions generated by the air purifier. That is to say, the utility model displays the current temperature and air quality on the display screen, and the system can intelligently adjust the fan speed and pulse power supply voltage according to the current air quality to maximize the contact surface between the air and the plasma concentration and fully purify the air.

Further, the utility model can also be: the charcoal adsorption filter layer is located on the right side of the fan, the ozone treatment layer is located on the left side of the air outlet, the plasma generation layer is located on the right side of the charcoal adsorption filter layer and the left side of the ozone treatment layer .

The negative plate of the plasma generation layer is composed of an aluminum plate coated with TIO2, the positive plate is composed of a nickel-chromium alloy strip, the positive plates are connected by copper wires, and the negative plates are connected by studs (good conductivity). The boards are connected by nylon posts (cheap). The ozone treatment layer contains optical fiber bundles and nano photocatalysts.

The utility model uses the STM8 single-chip microcomputer as the core of the intelligent control system. After the purifier is turned on, the air quality sensor transmits the air information to the single-chip microcomputer control system. The display screen on the top of the purifier displays the air quality at the moment, and the single-chip microcomputer control system controls the fan. The PWM wave of the output voltage can adjust the speed of the fan, so that the speed of the fan can reach the best, and the purification effect of the purifier can reach the best. That is to say, the single-chip microcomputer judges the optimal voltage that the power supply should output according to the air quality, and controls the IO port of the single-chip microcomputer through the program to generate a PWM wave with the optimal width, so that the purification power can be optimized, which is conducive to energy saving.

When pollutants in the air pass through the first layer of charcoal adsorption filter layer and plasma generation layer, they enter the ozone treatment layer on the right side of the box. The ozone treatment layer is based on the photocatalytic oxidation mechanism at room temperature, using nano photocatalysts (such as TiO2 ), the optical fiber bundle is used as the carrier, and the ultraviolet lamp is used as a light source for an air purification layer. This layer maximizes the decomposition of photocatalysts and improves the purification efficiency of air quality by optimizing the influence of ultraviolet light intensity on purification efficiency and optimizing the design of nano-photocatalytic ventilation devices.

More specifically: the purification method of the plasma air cleaner provided by the utility model comprises the following steps:

Step 1: Turn on the power, the temperature sensor and air quality sensor on the leftmost side of the purifier start to work, and transmit the air temperature and quality information to the intelligent control system at the bottom of the purifier, and the intelligent control system controls the display to display the current temperature. Adjust the optimal fan speed according to the temperature and air quality.

Step 2: After turning on the fan, the air enters the first layer of charcoal adsorption filter layer, and the charcoal adsorption filter layer intercepts hair, pet dander, and large particles of dust.

Step 3: After the air passes through the first layer of charcoal adsorption filter layer, large particles of impurities are basically filtered out, and then enters the second layer of plasma generation layer. The positive and negative poles of the pulse power supply are respectively connected with the positive and negative poles of the plasma device to generate a high voltage of 15,000-25,000 volts. After the air is ionized at high pressure, a mixture including electrons, various ions, atoms and free radicals is produced, which bombards pollutant molecules to ionize, dissociate and excite them. The plasma can also severely break down and damage the cell membrane, so It can not only purify formaldehyde, benzene, radon, ammonia, and other high-molecular organic substances, but also eliminate harmful substances such as bacteria and viruses. The intelligent control system can automatically adjust the power supply voltage according to the air quality, so that the ionized plasma concentration can reach the best, and the air purification efficiency can be improved.

Step 4: When the air passes through the second layer of plasma generation layer, the ionized oxygen ions and oxygen molecules in the air will combine to produce a small amount of ozone, and a small amount of ozone enters the third layer of ozone treatment layer. The ozone treatment layer is based on the photocatalytic oxidation mechanism at room temperature, using nano photocatalysts (such as TiO2), optical fiber bundles as the carrier, and ultraviolet lamps as the air purification layer for the light source. The purification layer optimizes the influence of ultraviolet light intensity on the purification efficiency and optimizes the design of the nano-photocatalytic ventilation device to maximize the decomposition of the photocatalyst and improve the air purification efficiency.

Claims (9)

1. A plasma air purifier based on STM8 single-chip intelligent control. One side of the housing is provided with an air inlet, and the other side is provided with an air outlet. A fan is arranged in the housing at the air inlet, and the housing is also arranged in turn. There are charcoal filter adsorption layer, plasma generation layer and ozone treatment layer, switch button, display device and wind speed control button are set on the top of the shell, and the characteristics are that: STM8 single chip microcomputer intelligent control device and pulse power supply are set at the bottom of the shell, and the fan An air quality sensor and a temperature sensor are arranged below, and the air quality sensor, temperature sensor, switch button, display device and wind speed control button are all connected to the STM8 single-chip intelligent control device. 2. A kind of plasma air purifier based on STM8 single-chip intelligent control type according to claim 1, it is characterized in that: the charcoal filter adsorption layer is located at the air inlet side, the ozone treatment layer is located at the air outlet side, and the plasma generation layer is located at the charcoal filter adsorption layer and the ozone treatment layer. 3. A kind of plasma air cleaner based on STM8 single-chip microcomputer intelligent control type according to claim 1 or 2, it is characterized in that: the positive plate of plasma generation layer is made up of nickel-chromium alloy strip, and negative plate is made up of the aluminum plate that is coated with TIO2 , The positive plates are connected by copper wires, the negative plates are connected by studs, and the positive and negative plates are connected by nylon posts. 4. A kind of plasma air cleaner based on STM8 single-chip microcomputer intelligent control type according to claim 1 or 2, it is characterized in that: the ozone treatment layer is made of ultraviolet lamp as light source, contains optical fiber bundle and nanometer photocatalyst. 5. A kind of plasma air cleaner based on STM8 single-chip microcomputer intelligent control type according to claim 3, it is characterized in that: the ozone treatment layer is made of ultraviolet lamp as light source, contains optical fiber bundle and nanometer photocatalyst. 6. A kind of plasma air cleaner based on the intelligent control of STM8 single-chip microcomputer according to claim 1 or 2, characterized in that: the intelligent control device of the STM8 single-chip microcomputer is combined with an optimization algorithm, which can be obtained according to the detection of the air quality sensor and the temperature sensor The air quality produces PWM waves with different frequencies and different duty ratios to control the output voltage of the fan and adjust the fan speed. 7. A kind of plasma air cleaner based on the intelligent control type of STM8 single-chip microcomputer according to claim 3, characterized in that: the intelligent control device of the STM8 single-chip microcomputer is combined with an optimization algorithm, which can detect the obtained air according to the air quality sensor and the temperature sensor. The mass generates PWM waves with different frequencies and different duty ratios to control the output voltage of the fan and adjust the fan speed. 8. A kind of plasma air cleaner based on the intelligent control type of STM8 single-chip microcomputer according to claim 4, characterized in that: the intelligent control device of the STM8 single-chip microcomputer is combined with an optimization algorithm, and can detect the obtained air according to the air quality sensor and the temperature sensor. The mass generates PWM waves with different frequencies and different duty ratios to control the output voltage of the fan and adjust the fan speed. 9. A kind of plasma air cleaner based on STM8 single-chip intelligent control type according to claim 5, characterized in that: said STM8 single-chip intelligent control device is combined with an optimization algorithm, which can detect the obtained air according to the air quality sensor and the temperature sensor. The mass generates PWM waves with different frequencies and different duty ratios to control the output voltage of the fan and adjust the fan speed.