KR20160073569A - Auto vantilation system and eco navigation system using the same - Google Patents

Abstract

An embodiment relates to an automatic ventilation system, measuring indoor and outdoor air states of a building and controlling the indoor air state of the building. The automatic ventilation system comprises: an external sensor unit measuring the outdoor air state; an internal sensor unit measuring the indoor air state; a ventilation unit enabling the air to circulate an indoor space and an outdoor space of the building; a display unit displaying the measured indoor and outdoor air states; and a control unit controlling the display unit and the ventilation unit in accordance with the indoor and outdoor air states.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic ventilation system and an eco-

The present invention relates to an automatic ventilation system and a control method thereof, and more particularly, to an automatic ventilation system and a control method thereof for sensing the quality of indoor and outdoor air in real time and controlling the ventilation system according to sensed information.

There is an increasing demand for a ventilation system to minimize the damage of fine dust and ultrafine dust, which is a recent issue.

Fine dust is a very small material that is invisible to the naked eye and refers to a particulate material with a diameter of 10 μm or less that floats or drifts in the air for a long time. It is an air pollutant that is produced when fossil fuels such as coal and petroleum are burned, or when they come out from exhaust gas such as manufacturing and automobile soot, and are adsorbed to the lungs through the bronchi and cause various kinds of lung diseases.

)당 농도가 매우 높아 짧은 시간이라도 실내에 유입된다면 그 양은 실내 미세먼지 기준농도를 훨씬 상회하게 된다는 연구결과도 있다. Especially, the ultrafine dust that has recently flown from China is the biggest issue. Currently, dust covering the country is ultra fine dust with an average diameter of less than 2.5㎛ classified as 'PM2.5'. It is almost a half of the thickness of the hair. Very fine dust. Easily passed through the nose and bronchial cilia. Very small particles cause difficulty in evacuation and accumulation in the body. In addition, the fine dust has a unit area (

) The concentration of sugar is so high that even if it is introduced into the room for a short time, the amount of the solution is much higher than the reference concentration of the indoor fine dust.

And, toxic ultrafine dusts cause various respiratory diseases such as asthma, bronchitis and lung cancer. When the ultrafine dust increases by 2.5 μm per m ³ , the blood vessels become thicker by 14 μm, which increases the risk of developing a stroke-like disease. In recent years, the number of patients seeking a hospital for respiratory illness has increased dramatically.

On the other hand, when air is not ventilated because of this fine dust, indoor air becomes turbid and the working efficiency may be lowered due to lack of oxygen. A system that is currently sold on the market has a problem in that a system for removing only fine dust and ventilation without consideration of ventilation does not consider fine dust.

That is, currently, there is a technique of purifying indoor air with an air purifier as a method of removing fine dust, but there is no system that measures fine dust and ventilates it. For reference, the following prior art document (KR 10-1414858 B1, published on Jul. 03, 2014) relates to a fine dust measuring device.

It is best to ventilate by supplying fresh oxygen to the room and removing fine dust, but there are many cases where you do not know whether to ventilate or worry about fine dust outside.

Recently, the environmental authorities have proposed the concentration of the ultrafine dust in Korea, but the error is too high to present the concentration of each region in detail. There is a research result that the indoor environment may be worse if the outdoor air is much cheerful while unconditionally trusting it, but not knowing it and do not ventilate for a long time.

KR 10-1414858 B1

SUMMARY OF THE INVENTION An object of the present invention is to provide a system for automatically ventilating indoor and outdoor fine dust concentrations in real time so as to minimize the damage of fine dust, and a control method thereof.

The present invention provides a system and a control method thereof for providing a moving route in consideration of a fine dust concentration in connection with a specific moving means.

An automatic ventilation system according to an embodiment of the present invention is an automatic ventilation system for measuring an air condition inside and outside a building and controlling an air condition inside the building, the system comprising: an external sensor unit for measuring the external air condition; An internal sensor unit for measuring the internal air condition; A ventilation part for circulating air inside and outside the building; A display unit for displaying the measured state of the outside and inside air; And a control unit for controlling the display unit and the ventilation unit according to the external and internal air conditions.

The external sensor unit may include a fine dust sensor for measuring the fine dust concentration of the outside air.

The fine dust sensor may include an illumination part, an illumination area, a light receiving part, and a data collecting part.

The data collecting unit of the fine dust sensor may collect the light pulses irradiated from the illumination unit and the scattered light pulses scattered in the particles into the voltage pulse data.

The voltage pulse data collected by the data acquisition unit may be a PWM signal to measure the fine dust concentration from the ratio of the low pulse of the PWM signal.

The external sensor unit may further include an ozone sensor.

And an air purifier for purifying the air inside the building under the control of the central control unit.

The display unit may display the state of the outside and inside air, and the state of the ventilation unit on a single screen.

The central control unit predicts a seasonal situation using the outside or inside air condition information and controls the ventilation unit.

The internal sensor unit may include a carbon dioxide sensor.

According to another embodiment of the present invention, there is provided an eco-navigation system including a transceiver for receiving air condition information for each position collected by an external sensor from a server; A location searching unit for locating a user location in real time; A display unit for displaying the air condition information; And a controller for controlling the transceiver, the position searching unit, and the display unit. The controller may provide a route reflecting the air condition information when a destination is input from the user.

 The automatic ventilation system according to an embodiment of the present invention can monitor the inside and outside air condition and the ventilation state at each position of the building through the display of each external sensor unit, the display of the internal sensor unit, the display unit, There are advantages.

At this time, the automatic ventilation system has an advantage that it can display important information of the inside and outside air condition that can decide whether or not to ventilate.

In addition, the automatic ventilation system has an advantage of being able to maintain the inside of the building in a comfortable air state by controlling the ventilation part and the air purifying part by analyzing the inside and outside air condition information.

In addition, the automatic ventilation system of the embodiment has an advantage that the ventilation part can be appropriately controlled by the season of the inside and outside air.

Finally, the automatic ventilation system has the advantage of improving the internal air quality by opening / closing the ventilation part in stages according to the internal and external air conditions.

According to another embodiment of the present invention, there is provided an eco-navigation system including a transceiver for receiving air condition information for each position collected by an external sensor from a server; A location searching unit for locating a user location in real time; A display unit for displaying the air condition information; And a controller for controlling the transceiver, the position searching unit, and the display unit, wherein the controller provides a route reflecting the air condition information when a destination is input from the user.

1 is a block diagram of an automatic ventilation system according to an embodiment.
2 is a block diagram of an external sensor unit according to an embodiment.
3 is a schematic diagram of a fine dust sensor according to an embodiment.
4 is measurement data of the fine dust sensor according to the embodiment.
5 shows a method of processing fine dust measurement data according to an embodiment.
6 shows the final data of the fine dust sensor according to the embodiment.
7 is a block diagram of the internal sensor unit according to the embodiment.
Fig. 8 shows an embodiment showing the indoor and outdoor air conditions on the display unit.
9 shows a method of controlling the automatic ventilation system according to the embodiment.
10 shows a process in which the central control unit determines the ventilation according to an embodiment.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention.

The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Also, when an element is referred to as including an element, it is to be understood that the element may include other elements, without departing from the spirit or scope of the present invention.

1 is a block diagram of an automatic ventilation system according to an embodiment.

Referring to FIG. 1, an automatic ventilation system 10 according to an embodiment includes at least one external sensor unit 100, at least one internal sensor unit 200, a central control unit 600, a ventilation unit 300, A purifier 400, and a display 500. In addition, the automatic ventilation system 10 of the embodiment may further include the terminal 20.

The term " building " used in the present invention is not limited to a definition of a building used in a general sense, but narrowly means a fixture on a land. In a broad sense, .

 The description will be made on the basis that the automatic ventilation system 10 is installed in a building, 'inside' refers to the inside of the building, and 'outside' refers to outside the building.

Hereinafter, each configuration will be described in detail.

First, the external sensor unit 100 can measure the quality / state of the outside air of the automatic ventilation system 10. [

2 is a block diagram of the external sensor unit 100 according to the embodiment.

Referring to FIG. 2, the external sensor unit 100 includes a sensing unit 130 for sensing the state of the air such as an external temperature sensor 110, a fine dust sensor 120, an external humidity sensor 130, or an ozone sensor 140 An external display 160 for displaying the quality of the outside air and an external sensor wireless communication unit 170 for communicating with the central control unit 600 of the automatic ventilation system 10. [

First, the external sensor unit 100 may include temperature, humidity, fine dust concentration, or ozone concentration sensors 110, 120, 130, 140 capable of measuring the quality of outside air.

As the size of the building increases, it is necessary to individually determine the state of the air depending on each position of the building, so that a plurality of external sensor units 100 can be installed in various places of the building. Therefore, since the external sensor unit 100 may be an important factor for reducing the unit price, it is necessary to configure the sensors for sensing the reference element for determining the quality of the external air. In other words, the external sensor should be mainly composed of the sensor for the reference element for determining whether or not to ventilate.

In the embodiment, the external sensor unit 100 may include a fine dust or ozone concentration sensor 110 or 120, since the fine dust or ozone concentration is a fatal factor that can harm the health of people inside the building.

Particularly, since fine dusts can have completely different concentrations for each position of a building, it is necessary to accurately measure the fine dust density at the installed position and notify the user.

FIG. 3 is a schematic diagram of the fine dust sensor 120 according to the embodiment, FIG. 4 is a measurement data of the fine dust sensor 120 according to the embodiment, and FIG. 5 shows a method of processing fine dust measurement data according to the embodiment , Fig. 6 shows the final data of the fine dust sensor 120 according to the embodiment.

Hereinafter, the fine dust sensor 120 will be described in detail with reference to FIGS. 3 to 6. FIG.

3, the fine dust sensor 120 according to the embodiment may include an illumination unit 125, an illumination area 127, a light receiving unit 123, and a data collection unit 121.

First, the illumination area 127 may include an opening through which external air can enter and out, and may be surrounded by a reflector so that the light irradiated by the illumination part 125 is collected in the measurement space.

The illumination unit 125 may irradiate light to the illumination region to cause the irradiated light to generate deformed scattered light as it passes through the fine dust.

The light receiving unit 123 senses the irradiated light, and in particular, it can sense the scattered light generated when the light irradiated from the illuminating unit 125 passes through particles such as fine dust.

When light passes through particles such as smoke, dust, and fine dust, it can generate scattered light pulses depending on particle size. The light receiving unit 123 and the data collecting unit 121 can collect light by converting the light into voltage pulses. In the embodiment, the data collecting unit 121 may convert the scattered light pulses into PWM signals and collect them.

Hereinafter, the data analysis may be performed by a processor built in the fine dust sensor 120 itself, or may be performed by the external sensor controller 150 or the central controller. In the embodiment, data analysis is performed by the external sensor control unit 150. FIG.

Referring to FIG. 4, it can be seen that the PWM signal collected by the data collecting unit 121 is a sum of the irradiation light pulse irradiated by the illumination unit 125 and the scattered light pulse generated while passing through the particle. Here, it can be seen that a low pulse signal among the PWM signals is a signal generated by scattering the irradiation light. That is, in the embodiment, the irradiation light pulse is measured by the high pulse when irradiated at predetermined intervals of 10 to 90 ms in the illumination unit 125, and the scattered light is measured by the low pulse signal.

Therefore, if the sampling frequency is set to 1000Hz, the signal is measured in 1ms, so there is almost no signal loss. You can use the timer / interrupt function of the AVR to analyze the data like this.

The external sensor control unit 150 can measure the concentration of fine dust by analyzing the PWM signal transmitted from the data collection unit 121. In detail, the external sensor control unit 150 can calculate the fine dust concentration by measuring the ratio of the low pulse in the PWM signal.

5 shows a process in which the external sensor control unit 150 analyzes the PWM signal to measure fine dust.

First, when the illuminating unit 125 irradiates light having a pulse width interval of 10 to 90 ms, the light receiving unit 123 measures irradiated light and scattered light. The data acquisition unit 121 outputs a PWM signal by measuring the voltage pulse signal at a sampling frequency of 1000 Hz in units of 1 ms. At this time, the timer / interrupt function of the AVR can be used.

There are various methods for making an interrupt of 1 ms in an AVR having a clock of 16 MHz, but the embodiment can use an overflow method using an 8-bit timer / interrupt.

4us의 값을 1ms로 만들기 위해 TCNT0라는 레지스터를 250까지 카운트 해주고 초기화를 반복한다면 인터럽트는 1ms단위로 발생할 수 있다. 이를 통해, 1ms단위로 데이터를 취득 할 수 있다.That is, you can use the following formula to reset the clock:

To make 4us value 1ms, count TCNT0 register to 250 and repeat the initialization, the interrupt can occur in 1ms unit. In this way, data can be acquired in units of 1 ms.

The external sensor control unit 150 can calculate the fine dust concentration by measuring the ratio of the low pulse in the PWM signal.

FIG. 6 shows a value obtained by measuring fine dust with the data measured by the fine dust sensor 120. FIG.

Such a sensor for measuring the concentration of the dust sensor has an advantage that it can accurately measure fine dust in a simple manner.

On the other hand, the external sensor controller 150 may receive the measurement data from each of the sensors and derive a data value that can be recognized by the user.

For example, temperature and humidity sensors linearly change according to the output voltage. In order to measure the temperature and humidity sensors, first, the output voltage is converted into a digital value using the Analog to Digital Converter inside the MCU (Atmega128). Then, the external sensor controller 150 can derive the temperature and humidity data values according to the respective output voltages using Equations 1 and 2 below.

The external sensor control unit 150 can display the measured data to the user via the external display 160. [ Thus, passengers outside the building may be aware of the external air condition through the external display 160. [ This allows outside passengers to determine whether to open or close windows around the external display 160.

The external sensor wireless communication unit 170 may transmit the data output from the external sensor control unit 150 to the central control unit 600. [ The central control unit 600 can receive the air condition from the external sensor unit 100 disposed at each position of the building and the internal sensor unit 200 disposed inside the building and concentrate the information.

7 is a block diagram of the internal sensor unit 200 according to the embodiment.

Since the internal sensor unit 200 is similar to the external sensor unit 100, the overlapping description of the internal sensor unit 200 and the external sensor unit 100 will be omitted below.

The internal sensor unit 200 may include an internal temperature sensor 210, an internal fine dust sensor 220, an internal humidity sensor 230, and a carbon dioxide measurement sensor 240. The internal sensor unit 200 may further include an internal sensor control unit 250, an internal display 260, and an internal sensor communication unit 270.

First, the internal sensor unit 200 may include a temperature, a humidity, a fine dust concentration, or a carbon dioxide concentration sensor capable of measuring the quality of the internal air.

As the size of the building increases, it is necessary to individually judge the quality of the air according to each position of the building, so that a plurality of internal sensor units 200 can be installed in various places of the building. Accordingly, since the internal sensor unit 200 may be an important factor for reducing the unit price, it is necessary to configure the sensors for sensing the elements to be the reference for determining the quality of the internal air. In other words, the internal sensor should be mainly composed of the sensor for the reference element for determining whether or not to ventilate.

In the embodiment, the carbon dioxide measurement sensor 240 is included in the internal sensor unit 200 because the concentration of carbon dioxide in the internal air is the most important factor for ventilation.

The internal sensor unit 200 can display an internal air condition to users in the building through an internal display.

The internal sensor communication unit can inform the internal air condition information at each position of the building installed in the central control unit 600 through wired / wireless communication.

Meanwhile, the central control unit 600 can receive the air condition information for each position from the internal sensor unit 200 and the external sensor unit 100. The air condition can be informed through the display unit 500. Also, the central control unit 600 may inform the user of the air condition through the user terminal 20. [ Here, the terminal 20 may be a PC, a notebook computer, a smart phone, or the like.

The central control unit 600 can also receive the user's control command from the terminal 20 and control the ventilation unit and the air purification unit.

The display unit 500 may be installed separately, and may correspond to a display installed in the external sensor unit 100 and the internal sensor.

The user can monitor the indoor and outdoor air conditions in real time through the display unit 500, and the user can determine whether to vent or not. Particularly, the ventilation system of the embodiment can intensively display the air condition information, which is a standard for ventilation, and can help construct a pleasant environment inside the building.

8 is an embodiment showing the state of the inside and outside air in the display unit 500. FIG.

Referring to FIG. 8, it can be seen that the temperature, humidity, and fine dust concentration inside and outside are displayed on the display unit 500, and the open / closed state of the ventilation unit 300 (for example, a window) can be confirmed. That is, the user can monitor the air condition and the ventilation unit 300 status at a glance through the display unit 500.

The central control unit 600 controls the ventilation unit 300 and the air purifying unit 400 to control the air condition inside the building.

The ventilation unit 300 may include a side opening / closing window, an upper opening / closing window, a ventilator, and the like. A side opening and closing window is a window that can be opened by pulling to the side, and an upper opening and closing window is a window that can be opened by opening the open opening upward.

The central control unit 600 may divide the configuration of the ventilation unit 300 in stages. This criterion can be a measure of how much fine dust passes through.

For example, the side opening and closing windows are classified into three stages by passing the most dust through the filter, and the ventilator provided with the filter can be classified into one stage without passing fine dust. In addition, the upper opening and closing windows can be classified into two levels because they allow the fine dust to pass through to some degree.

The central control unit 600 receives internal and external air conditions from the external sensor unit 100 and the internal sensor unit 200 and can open and close the ventilation unit 300 in stages to ventilate. For example, when the external fine dust concentration is high, all the ventilation part 300 can be closed. At this time, if the internal carbon dioxide concentration is high and ventilation is indispensable, only the one-stage configuration of the ventilation unit 300 can be opened and ventilated. In the embodiment, when the concentration of the external fine dust is high and the internal carbon dioxide concentration is high, the central control unit 600 can operate only the ventilator provided with the filter and ventilate it.

The central control unit 600 may control the air purifier 400. FIG. The air purification unit 400 may include air conditioning facilities such as an air purifier and an air conditioner.

9 shows a method of controlling the automatic ventilation system 10 according to the embodiment.

Referring to FIG. 9, the internal and external sensor units 100 may measure the internal and external air conditions at respective positions and transmit the measured internal and external air conditions to the central control unit 600. (S101)

The central control unit 600 may display the internal and external air conditions to the user through the display unit 500 or the terminal 20. [ (S102). Thus, the user can monitor the internal and external air conditions at once through the display unit 500 or the terminal 20 at once. Therefore, for a window which is not automatically controlled, the user can arbitrarily determine opening and closing through the monitored information.

The central control unit 600 can determine whether ventilation is required based on the internal and external air conditions. (S103)

The central control unit 600 can determine the concentration of the particulate matter and the concentration of carbon dioxide in the interior and exterior of the indoor / outdoor air condition.

As described above, the central control unit 600 can set the step of the ventilation unit 300 on the basis of the fine dust concentration, and can control each configuration of the ventilation unit 300 in stages. (S104) For example, when the concentration of external fine dust is high, all the ventilation part 300 can be closed. At this time, if the internal carbon dioxide concentration is high and ventilation is indispensable, only the one-stage configuration of the ventilation unit 300 can be opened and ventilated. In the embodiment, when the concentration of the external fine dust is high and the internal carbon dioxide concentration is high, the central control unit 600 can operate only the ventilator provided with the filter and ventilate it.

On the other hand, the central control unit 600 predicts seasons through internal and external air condition information, and determines whether or not ventilation is required for each season. For example, if the temperature of the outside air is 10 degrees or less, it can be recognized as winter. If the humidity is higher than a certain level, the window can be closed by recognizing it as rain. In winter, the snow can be lowered, so the humidity standard for closing the window can be lowered.

That is, the central control unit 600 predicts the season in the inside / outside air state, and it is possible to appropriately control the ventilation unit 300 in accordance with the season.

FIG. 10 shows a process in which the central control unit 600 determines the ventilation according to an embodiment.

First, the central control unit 600 determines whether the temperature is outside the winter, based on whether or not the outside temperature exceeds 10 degrees.

When the temperature is lower than 10 degrees, it is possible to lower the humidity, which is a standard for a situation in which the snow and the rain come down in winter.

Next, the concentration of fine dust inside / outside is compared. If the inside is low, the window is not opened. If the inside is high, the following condition is reached.

Then, under the following conditions, the inside / outside temperature is compared. When the inside is high, the ventilation is performed. When the outside is high, the following conditions are met.

In the following conditions, the external humidity is taken into account because the rain and the rain in the spring and summer are so high that the windows can not be opened if the dust or the temperature is high even if it rains.

If the outside humidity exceeds 80%, the window will not open.

Next, when the outside temperature is less than 10 degrees, the inside / outside fine dust data is measured first, and when the outside is high, the window is closed.

The following conditions are different from spring and summer, and external / internal temperature data are compared. When the outside is high, the window is opened to ventilate. Under the following conditions, when the outside humidity reaches 60% or more, the window is closed.

The reason is that, as in the past, in autumn and winter, rain and snow often come in, so when the snow comes, the average humidity is about 60% and the window is closed. If the humidity is less than 60%, the window is opened to ventilate.

The automatic ventilation system of this embodiment is advantageous in that the user can monitor the inside and outside air condition and the ventilation state at each position of the building through the display of each external sensor part, the display of the internal sensor part, the display part or the terminal. At this time, the automatic ventilation system has an advantage that it can display important information of the inside and outside air condition that can decide whether or not to ventilate. In addition, the automatic ventilation system has an advantage of being able to maintain the inside of the building in a comfortable air state by controlling the ventilation part and the air purifying part by analyzing the inside and outside air condition information. In addition, the automatic ventilation system of the embodiment has an advantage that the ventilation part can be appropriately controlled by the season of the inside and outside air. Finally, the automatic ventilation system has the advantage of improving the internal air quality by opening / closing the ventilation part in stages according to the internal and external air conditions.

FIG. 11 is a block diagram of an eco-navigation system using an automatic ventilation system according to an embodiment, and FIG. 12 is a flowchart illustrating eco-navigation using an automatic ventilation system according to an embodiment.

Referring to FIG. 11, the eco-navigation system according to the embodiment may include an automatic ventilation system 10, a server 30, and a terminal 20.

The eco-navigation system 1 of the embodiment can provide a user with the ability to monitor the air condition information in the vicinity of the user or on the moving route during the running or jogging of a bicycle, an automobile, etc., Or exercise path.

In more detail, the eco-navigation system 1 can be used to transmit the air condition information measured from an external sensor to the server 30 via the Internet or the like. At this time, the external sensor can transmit the measured air condition information directly to the server 30 without going through the central control unit, but the present invention is not limited thereto.

The server 30 can collect the air condition information for each position through the automatic ventilation system 10 installed in each building. Then, the server 30 may match the collected air condition information on each map.

The terminal 20 can search for the location of the user through a GPS or the like. Air condition information matched with the map and air condition information in the vicinity of the user position can be received from the server 30 in real time.

Through this, the terminal 20 can display the air condition information near the user's position and the air condition information matched with the map around the user's position. The user can monitor the air condition information for each position in real time, thereby preventing the user from being exposed to fine dust, ozone or the like.

When the user inputs the destination to the terminal 20, the terminal 20 can set the travel route in consideration of the air condition information. At this time, the terminal 20 may set the movement route by reflecting the traffic condition, but the present invention is not limited thereto.

Finally, the terminal 20 may provide a navigation path, including a map including air status information, in a navigation mode.

Hereinafter, the eco-navigation method will be described in more detail with reference to FIG.

First, the terminal 20 can receive the air condition information for each position from the server 30 in real time. (S301)

Then, the terminal 20 can display the air condition information for each position by matching with the map. (S302) In another embodiment, when receiving the air condition information matched with the map from the server 30, the terminal 20 may display it immediately.

Then, the terminal 20 can grasp the position of the user in real time and display the air condition information matched to the user's position.

Thereafter, when the user inputs an input to the destination, the terminal 20 can search for the route by considering the air condition information matched with the map. (S304)

For example, the terminal 20 can search for a path that bypasses a place where fine dust is high. Alternatively, the terminal 20 can search for a path that bypasses a place having a high ozone concentration.

After the path setting is completed, the terminal 20 can display the navigation mode. (S305)

The navigation mode may include a travel route from the user's location to the destination, a map around the travel route, and a map and matched air condition information.

The terminal 20 has an advantage of preventing a user from being exposed to fine dust, ozone, or the like by providing a moving path including air condition information.

The features, structures, effects and the like described in the embodiments are included in at least one embodiment of the present invention and are not necessarily limited to only one embodiment. Furthermore, the features, structures, effects and the like illustrated in the embodiments can be combined and modified by other persons skilled in the art to which the embodiments belong. Therefore, it should be understood that the present invention is not limited to these combinations and modifications.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be understood that various modifications and applications are possible. For example, each component specifically shown in the embodiments can be modified and implemented. It is to be understood that all changes and modifications that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Claims (11)

An automatic ventilation system for measuring the air condition inside and outside of a building and controlling the air condition inside the building,
An external sensor unit for measuring the external air condition;
An internal sensor unit for measuring the internal air condition;
A ventilation part for circulating air inside and outside the building;
A display unit for displaying the measured state of the outside and inside air; And
And a control unit for controlling the display unit and the ventilation unit according to the external and internal air conditions. The method according to claim 1,
Wherein the external sensor unit includes a fine dust sensor for measuring a fine dust density of the outside air. 3. The method of claim 2,
Wherein the fine dust sensor includes an illumination part, an illumination area, a light receiving part, and a data collecting part. The method of claim 3,
Wherein the data collecting unit of the fine dust sensor collects the light pulses irradiated by the illumination unit and scattered light pulses scattered on the particles as voltage pulse data. 5. The method of claim 4,
Wherein the voltage pulse data collected by the data acquisition unit is a PWM signal and measures the fine dust concentration from the ratio of the low pulse of the PWM signal. The method according to claim 1,
Wherein the external sensor unit further comprises an ozone sensor. The method according to claim 1,
And an air purifier for purifying the air inside the building under the control of the central control unit. The method according to claim 1,
Wherein the display unit displays the state of the outside and inside air and the state of the ventilation unit on a single screen. The method according to claim 1,
Wherein the central control unit predicts a seasonal situation using the outside or inside air condition information and controls the ventilation unit. The method according to claim 1,
Wherein the internal sensor portion includes a carbon dioxide sensor. A transmitting and receiving unit for receiving air condition information for each position collected by an external sensor from a server;
A location searching unit for locating a user location in real time;
A display unit for displaying the air condition information;
And a controller for controlling the transceiver, the position searching unit, and the display unit,
Wherein the control unit provides a travel route reflecting the air condition information when a destination is input from the user.

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