KR102014770B1 - Room air monitoring apparatus - Google Patents

Abstract

The present invention relates to an indoor air monitoring apparatus. According to an embodiment, the indoor air monitoring apparatus includes: a cylindrical base module having an open upper part and including a vent formed on a lateral side; a plurality of sensor modules sequentially stacked on the base module and having a cylindrical shape; a cylindrical main module stacked on the uppermost one of the sensor modules; and a cover stacked on the main module and covering the top of the main module. Each of the sensor modules includes at least one sensor to sense at least one type of harmful gas or fine dust. The main module calculates the concentration of the harmful gas or fine dust by receiving a sensing signal from the sensor of each of the sensor modules. The base module, the sensor modules, the main module and the cover are removably combined.

Description

Room air monitoring apparatus

The present invention relates to an indoor air monitoring device, and more particularly, to an indoor air monitoring device having a structure capable of detecting and monitoring various types of harmful gases or fine dust and easily attaching and detaching each sensor. .

In general, the pollution of the air in the indoor environment is a generation of polluting gases such as nitrogen dioxide, carbon monoxide, carbon dioxide, etc. generated from smoking and combustion gases. In addition, radon gas, formaldehyde, volatile organic components, and environmental hormones generated from building materials and synthetic resins are typical indoor pollutant gases. The causes of indoor air pollution include pollutants and heat insulation due to industrial development, lack of ventilation due to airtightness, indoor smoking, use of combustion equipment, use of interior materials such as wall and floor materials, and indoor air inflow of polluted external air. This is the most representative cause, and as the awareness of health increases recently, interest in indoor air quality also increases.

Hazardous substances affecting indoor air quality include CO, CO2, NO2, SO2, ozone, fine dust, heavy metals, asbestos, radon, volatile organic compounds, formaldehyde and pathogenic bacteria. Various gas sensors and measuring equipment have been developed. However, in order to measure all of the above-mentioned harmful substances, it is not easy to install and maintain indoors because the cost of the device is excessive and the size of the measuring device becomes large. Therefore, there is a need for a device capable of measuring a variety of harmful substances, but can be measured and monitored by combining various sensors according to the installation location of the device or the needs of the user.

Patent Document 1: Korean Patent Registration No. 10-1695596 (January 11, 2017)

According to an embodiment of the present invention, an object of the present invention is to provide an indoor air monitoring device that can detect and monitor various harmful substances with one device.

According to an embodiment of the present invention, an object of the present invention is to provide an indoor air monitoring apparatus having a structure capable of attaching and detaching a sensor module in response to the main sensing target changes according to the installation location of the device or the needs of the user.

According to one embodiment of the present invention, by forming the hazardous substance detection and monitoring device in the form of a vertical stand, not only reduces the area occupied in the room, but also adjusts the height of the device to properly detect various harmful substances according to the height. It is also an object of the present invention to provide an indoor air monitoring device capable of purifying indoor air by controlling wired or wireless ventilation equipment, exhaust equipment and / or air purification equipment outside the apparatus.

According to an embodiment of the present invention, the tubular base module is formed in the upper opening and the vent hole on the side; A plurality of sensor modules sequentially stacked on the base module and each having a tubular shape; A cylindrical main module stacked on the uppermost sensor module of the plurality of sensor modules; And a cover stacked on the main module and covering the top of the main module, wherein each sensor module includes at least one sensor capable of detecting at least one kind of harmful gas or fine dust, and the main module includes at least one sensor. Receiving a detection signal of the sensor of the module to calculate the concentration of harmful gas or fine dust, each of the base module, the plurality of sensor modules, the main module, and the cover is detachably coupled to each other, the plurality of sensor modules Each of the main module and the cover has a through hole penetrating up and down the center, so that air introduced into the vent of the base module can be discharged to the outside through the through hole of the cover. Provide a monitoring device.

According to an embodiment of the present invention, one device can detect and monitor various harmful substances, and in particular, by configuring the device in a vertical stand type, not only reduces the area occupied in the room but also variously adjusts the height of the device. According to have the advantage that can properly detect a variety of harmful substances.

According to an embodiment of the present invention, since various types of sensor modules can be attached and detached, an appropriate combination of sensor modules can be installed in response to changes in hazardous substances, which are the main sensing targets, according to the installation location of the device or the needs of the user. In addition, repair or update of the main module, filter replacement of the filter module, etc. also has the advantage that it is convenient and easy to perform.

According to an embodiment of the present invention, since the filter module can be selectively mounted on the upper or lower portion of the sensor module, the indoor air before the air purification or the indoor air after the air purification can be selectively measured as necessary. Integrated control of indoor air can be achieved by communicating wired and wirelessly with the ventilation, exhaust and / or air purification facilities and controlling them.

1 is a perspective view of an indoor air monitoring apparatus according to an embodiment of the present invention;
2 is a cross-sectional view of an indoor air monitoring apparatus according to an embodiment;
3 is a perspective view of a unit module case according to one embodiment;
4 is a cross-sectional view of a unit module case according to one embodiment;
5 is a block diagram of an indoor air monitoring apparatus according to an embodiment;
6 is a flowchart illustrating a module positioning operation according to an embodiment;
7 is a flowchart illustrating an indoor air monitoring operation according to an exemplary embodiment.

Objects, other objects, features and advantages of the present invention will be readily understood through the following preferred embodiments associated with the accompanying drawings. However, the present invention is not limited to the embodiments described herein and may be embodied in other forms. Rather, the embodiments introduced herein are provided so that the disclosure may be made thorough and complete, and to fully convey the spirit of the present invention to those skilled in the art.

In the drawings of the present specification, the length, thickness, width, etc. of the components may be exaggerated for the effective description of the technical content.

In this specification, the singular also includes the plural unless specifically stated otherwise in the phrase. As used herein, the words 'comprise' and / or 'comprising' do not exclude the presence or addition of one or more other components.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. In describing the specific embodiments below, various specific details are set forth in order to explain and understand the invention more specifically. However, those skilled in the art can understand that the present invention can be used without these various specific details. In some cases, it is mentioned in advance that parts of the invention which are commonly known in the present invention and which are not related to the invention are not described in order to avoid confusion in describing the present invention.

1 is a perspective view of an indoor air monitoring apparatus according to an embodiment of the present invention and Figure 2 schematically shows a cross-sectional view. Referring to the drawings, the indoor air monitoring apparatus according to an embodiment from the bottom to the base module 10, one or more sensor modules 20, filter module 30, the main module 40, and the cover 50 Can be configured.

The base module 10 is disposed at the bottom of the indoor air monitoring apparatus and has a cylindrical shape. The upper surface of the base module 10 is open and at least one vent 12 is formed at a side thereof so that outside air may be introduced into the apparatus through the vent 12.

The sensor module 20, the filter module 30, and the main module 40 are sequentially stacked on the base module 10 to form a monitoring device. The sensor module 20 has a cylindrical shape and includes a sensor for measuring at least one harmful gas or fine dust therein. Several sensor modules 20 may be installed in one monitoring device. Although two sensor modules 20 are illustrated in the illustrated embodiment, for example, three, four, or more sensor modules 20 may be stacked to configure a monitoring device.

The filter module 30 has a cylindrical shape and includes one or more filters for filtering harmful gas or fine dust. In one embodiment, the filter module 30 may be omitted.

The main module 40 has a cylindrical shape and receives a measurement signal of a sensor of each sensor module 20 to calculate a concentration of harmful gas or fine dust. The exterior of the main module 40 includes one or more displays 440 and buttons 450. The user may control the on / off and operation of the indoor air monitoring device through the button 450. The display 440 may display information such as temperature and humidity, and measurement information such as harmful gas or fine dust. In one embodiment, the indoor air monitoring device may communicate with an external device such as an air purifier through a network, and at this time, the main module 40 may be driven by remotely controlling an external device such as an external air purifier.

The cover 50 is a member covering the upper surface of the stacked sensor module 20, the filter module 30, and the module disposed on the uppermost layer of the main module 40.

The stacking order of the sensor module 20, the filter module 30, and the main module 40 is not limited to a specific order. For example, when there are a plurality of sensor modules 20, the order between the sensor modules 20 may be stacked in any order. In the illustrated embodiment, the main module 40 is disposed on the top layer, but alternatively, the main module 40 may be disposed at any position. For example, the order of the filter module 30 and the main module 40 may be changed.

Each of the sensor module 20, the filter module 30, the main module 40, and the cover 50 is formed with a through hole penetrating up and down the center. That is, as shown in FIG. 2, through holes 25, 35, 45, and 55 are formed in each of the sensor module 20, the filter module 30, the main module 40, and the cover 50. Air introduced into the vent hole 12 of the base module 10 may rise through the through holes 25, 35, 45, and 55 of the center portion and be discharged to the outside.

In a preferred embodiment, each of the above-described base module 10, the plurality of sensor modules 20, the filter module 30, the main module 40, and the cover 50 are detachably coupled to each other. Any known manner of desorption can be applied for this purpose. For example, a thread is formed to engage each other on a part of the upper outer circumferential surface and a part of the lower inner circumferential surface of each module 10, 20, 30, 40, 50 so that the two modules can be inserted by turning the upper module and the lower module and turning a predetermined angle. In addition, in alternative embodiments, a screw, bolt-nut, buckle, or the like may be detachably coupled to a module using a known fastening method.

The outer shapes of the base module 10, the plurality of sensor modules 20, the filter module 30, and the main module 40 each have the same tubular shape. For example, in the illustrated embodiment, each module 10, 20, 30, 40 has a cylindrical appearance of the same diameter, and therefore, even if the stacking order is changed, it may have a device appearance of the same shape as before the change. While the drawings show that each module 10, 20, 30, 40 has a cylindrical shape, in an alternative embodiment each module 10, 20, 30, 40 has a rectangular, pentagonal, or rounded corner. It can be manufactured in various shapes such as quadrangular and pentagonal. In addition, the heights of the modules 10, 20, 30, and 40 may be the same or different from each other.

The case of the sensor module 20, the filter module 30, and the main module 40 may have the same or similar internal and external configurations. Hereinafter, a case of the sensor module 20 will be described with reference to FIGS. 3 and 4.

3 is a perspective view of a case of an exemplary sensor module 20 and FIG. 4 is a sectional view. Referring to the drawings, the sensor module 20 has a case composed of an outer wall 21, an inner wall 22, and a support plate 23. The inner wall 22 has a cylindrical shape with the top and bottom open, and defines a central through hole 25. The outer wall 21 is a member corresponding to the side of the exterior of the sensor module 20, and is configured such that the upper and lower portions thereof are opened and surround the inner wall 22. In the illustrated embodiment, the outer wall 21 and the inner wall 22 are cylindrical and aligned to have the same center point. However, the shape of each wall (21, 22) may vary in the shape of a square or pentagonal cylinder, and the center point of the two walls (21, 22) may not necessarily be the same.

The support plate 23 is composed of a horizontal plate interposed between the outer wall 21 and the inner wall 22 to connect the two walls 21 and 22, and thus the outer wall 21, the inner wall 22, and the support plate ( 23) a space is formed inside the sensor module 20, and can accommodate components such as a sensor in the space.

In one embodiment the outer wall 21 and the inner wall 22 may have the same height, but in alternative embodiments the height of the inner wall 22 may be lower than the outer wall 21. Also in the illustrated embodiment the inner wall 22 has at least one vent 24 penetrating the inner wall. Therefore, some of the air rising through the through hole 25 in the vertical direction of the center of the sensor module 20 may be introduced into the inner space of the sensor module 20 through the ventilation hole 24.

As shown in FIG. 4, one or more electronic device modules 200 may be disposed in the internal space of the sensor module 20. The electronic device module 200 may include a sensor that detects one or more kinds of harmful gas or fine dust, and a control circuit that receives a measurement signal of the sensor and transmits the measured signal to the main module 40. The electronic device module 200 also includes a socket 29 for communicating with other modules 10, 20, 30, 40 attached to the top and bottom of the sensor module 20. The socket 29 may include a lower socket 29a for communicating with another module attached below the sensor module 20 and an upper socket 29b for communicating with another module attached above. Each socket 29a, 29b may be electrically connected to the upper and lower modules, for example via connector 60.

The connector 60 may include, for example, a data line, a control line, and a power line for transferring data signals, control signals, and power to the upper or lower modules, respectively. One or more of,, and power lines may be omitted. The physical connection structure of the connector 60 and the socket 29 may be implemented in a known manner, for example RS232, RJ45, USB.

Meanwhile, the filter module 30 and the main module 40 have the same or similar configuration as the sensor module 20 described above. Referring to FIG. 2, the filter module 30 includes an inner wall 32 and a support plate 33 therein, and a through hole 35 in the vertical direction is formed inside the inner wall 32. The filter module 30 has one or more air purification filters 37 installed to cover the through holes 35. The filter 37 is composed of, for example, a nonwoven fabric, activated carbon, and an adsorption cloth, and can adsorb or filter harmful gases such as radon or fine dust. In one embodiment, one or more electronic device modules 300 may be mounted on the support plate 33 of the filter module 30, and the electronic device module 300 is connected to upper and lower modules through the connector 60. .

The main module 40 includes an inner wall 42 and a support plate 43 therein, and a through hole 45 in an up and down direction is formed inside the inner wall. One or more electronic device modules 400 may be mounted on the support plate 43 to communicate with the lower module through the connector 60.

On the other hand, the base module 10 is formed with a vent 12 through which air is introduced, and may have a driving fan 15 and an electronic device module 100 therein. The electronic device module 100 may control the operation of the driving fan 15, communicate with the upper module, and receive power from the outside and transfer the power to the upper module.

5 is a block diagram illustrating a base module 10, a sensor module 20, a filter module 30, and a main module 40 of an indoor air monitoring apparatus according to an exemplary embodiment.

Referring to the drawings, the base module 10 may include a driving fan 15, a motor 17, and an electronic device module 100. The electronic device module 100 may include, for example, a controller 110 implemented as a microcontroller (microcom), and the controller 110 may include a sensor module 20, a filter module 30, and a main module 40. It can communicate and control the motor 17 to drive the fan 15. The base module 10 also has at least one socket 19 coupled with the connector 60.

Each of the plurality of sensor modules 20 may include an electronic device module 200 in which the controller 210 and one or more sensors 220 are mounted, and a lower socket 29a and an upper socket for connecting the lower module and the upper module, respectively. 29b).

The sensor 220 may detect at least one kind of harmful gas or fine dust. In one embodiment, the sensor for detecting noxious gas is for example an ozone (O3) sensor, a carbon monoxide (CO) sensor, a nitrogen oxide (NOx) sensor, an ammonia (NH3) sensor, a fire alarm sensor, a liquefied petroleum gas (LPG) sensor It may include one of a liquefied natural gas (LNG) sensor, a volatile organic compound (VOC) sensor, and a radon sensor, each sensor can detect at least one or more of these harmful gases.

When stacking a plurality of sensor modules 20 in the indoor air monitoring apparatus of the present invention, the sensor module 20 having a sensor for detecting at least one of the lighter than the air is disposed above and at least among the heavier than air The sensor module 20 having a sensor for detecting one is disposed below. For example, the sensor module 20 having a radon sensor, an ozone (O3) sensor, a liquefied petroleum gas (LPG) sensor, and a sensor for detecting a gas that is heavier than air in the VOC is preferably disposed as low as possible.

As such, when the plurality of sensor modules 20 are mounted in the indoor air monitoring device, there may be a preferable stacking order between the sensor modules, but it is not easy for a general user to know the stacking order. Therefore, in one embodiment of the present invention, when the indoor air monitoring device is turned on, the main module 40 grasps the position (order) of the entire stacked modules and compares the order with the pre-stored reference order to determine whether the sensor modules are properly stacked. It can be informed whether the user, which will be described later with reference to FIG.

In one embodiment, it is possible to increase the indoor air monitoring device of the present invention for accurate and rapid measurement of harmful gases lighter than air. For example, one or more dummy modules (not shown) may be further inserted over the base module 10 and the sensor module 20 may be mounted thereon. The dummy module is, for example, a module having the same or similar shape as the case of the sensor module 20 shown in FIGS. 3 and 4 but without a sensor or an electronic circuit element. By using such a dummy module, the overall height of the device can be adjusted according to the environment where the indoor air monitoring device is installed or the user's needs, and appropriate sensor modules are placed at the bottom or top of the dummy module according to the type of harmful gas to be detected. By mounting the harmful gas can be measured more accurately and quickly.

When each sensor 220 detects a noxious gas, the sensor generates a detection signal and transmits the detection signal to the control unit 210. The control unit 210 performs preprocessing such as filtering and amplification on the detection signal, and then transfers the signal to the upper socket 29b. And transfers to the main module 40 through the connector 60. The controller 210 may be implemented as, for example, a microcontroller (microcomputer).

The pre-detected detection signal is transmitted to the main module 40 via one or more modules 20 and 30 of the upper layer. For this purpose, the control unit 210 or 310 of each sensor module 20 or the filter module 30 is connected to a lower socket. When receiving the detection signal coming from the module lower than itself through the (29a, 39a) can be configured to deliver it upwards.

The filter module 30 includes an electronic device module 300 having one or more filters 37, a base module 10, a sensor module 20, and a controller 310 in communication with the main module 40, and a lower portion. And a lower socket 39a and an upper socket 39b for connecting with the module and the upper module, respectively. In one embodiment, the controller 310 relays data between the upper module and the lower module and transmits power. For example, when data (detection signal) comes up from the lower module through the lower socket 39a, it is transmitted to the upper main module 40 side, and when the control signal comes down from the main module 40 through the upper socket 39b, You can pass it to the bottom module.

The main module 40 may include an electronic device module 400 on which the controller 410, etc. are mounted, a display 440, a user input unit 450, and a speaker 460. In an embodiment, the electronic device module 400 includes a control unit 410, a temperature and / or humidity sensor 420, and a communication unit 430.

The control unit 410 controls the operation of each sensor installed in each of the plurality of sensor modules 20, calculates the concentration of harmful gas or fine dust detected by the sensor based on the detection signal received from each sensor, and calculates The displayed concentration is displayed on the display 440, and when the calculated concentration is higher than the predetermined reference concentration, the fan 15 of the base module 10 is driven to purify the air, and the ventilation unit outside the apparatus through the communication unit 430, It may be configured to communicate with and control the exhaust and / or air purification equipment to purify the indoor air. In one embodiment, the controller 410 may be implemented in hardware and / or software such as a processor, a memory, a storage device, or the like for performing such a function, for example, may be implemented in a microcontroller.

The communication unit 430 is a function unit for communicating with the indoor air monitoring device of the present invention and an external computing device (for example, a smartphone, etc.) and / or a ventilation facility, an air exhaust facility, and an air purification facility, for example, WiFi, Short-range wireless communication networks such as ZigBee, Bluetooth, and infrared communication may be used. Alternatively, a wired communication network may be used for communicating with the external device.

6 is a flowchart illustrating a module positioning operation according to an embodiment. In order to confirm the location of each module, each of the modules constituting the indoor air monitoring apparatus of the present invention, that is, the base module 10, each of the sensor module 20, the filter module 30, and the main module 40, respectively Assume that a module identification number (ID) for identifying an ID is assigned to each module.

Referring to the drawing, first, when the power of the indoor air monitoring apparatus is turned on in step S110, the control unit 410 of the main module 40 transmits a positioning signal to the base module 10. In this case, the positioning signal may be sequentially transmitted through the filter module 30 and the sensor module 20.

When the control unit 110 of the base module 10 receives the positioning signal, in step S120, the control unit 110 transmits the position data including the module ID of the base module 10 to the upper module. The upper module receiving this position data adds its own module ID to the received position data. For example, each module can create new location data by adding its module ID to the end of the data packet of the received location data. The module passes this position data back to the module above it (step S130), and this operation is repeated until the main module 40 receives the position data (step S135).

When the main module 40 receives the position data (step S140), when the main module 40 receives the position data, the main module 40 determines the stacking position of each sensor module and the filter module based on the received data (step S150). For example, if each module is configured to attach its own module ID to the back of the data packet of location data, then the main module 140 is based on the order of the module IDs included in the data packet of the location data. The stacking order of 10, 20 and 30 can be understood. Thereafter, the main module 40 may compare whether the stacking order matches the pre-stored reference stacking order and output the notification information according to the comparison result on the display 440.

The reference stacking order may vary depending on the specific embodiment, and as an exemplary reference stacking order, for example, if the purpose is to measure indoor air before air purification, the filter module 30 should be installed at a higher level than all the sensor modules 20. It may include. Conversely, if the purpose is to measure indoor air after air purification, it may be included in the reference stacking order that the filter module 30 is installed below all the sensor modules 20.

In addition, stacking a sensor module having a sensor that detects at least one of light gas, smoke, and fine dust lighter than air is stacked above the sensor module having a sensor that detects at least one of gas heavier than air. Can be included in order. For example, a sensor module having a radon sensor may define a reference stacking order so that it is always installed directly above the base module 10.

As described above, according to the present invention, it is possible to inform the user of the stacking order of the appropriate modules according to FIG. 6. It allows the device to be configured in the most optimally detectable stacking order.

An exemplary indoor air monitoring operation will now be described with reference to FIG. 7.

Referring to the drawing, in step S210, the sensor of each sensor module 20 periodically senses air according to a set cycle and transmits a measurement signal to the main module 40. At this time, in one embodiment, each sensor module 20 generates sensing data including its module ID and a measurement signal and transmits the sensing data to the main module 40.

The main module 40 determines which harmful gas is measured from the module ID of the received sensing data and calculates the concentration of the harmful gas from the measured signal according to the concentration calculation algorithm for the harmful gas. (Step S220), the calculated concentration may be compared with a predetermined reference value (step S230), and if necessary, the comparison result may be displayed on the display 440 (step S240).

In one embodiment, if the measured concentration exceeds the reference value, it is determined that air purification is necessary (S250), and the air purification may be performed by operating the driving fan 15 for a predetermined time (step S260). Alternatively, when the measured concentration exceeds the reference value, the control unit 410 of the main module 40 controls the ventilation equipment, the air exhaust equipment and / or the air purification equipment outside the apparatus through wired or wireless communication to ventilate and discharge the air. And / or perform an air purification operation.

When it is determined that the ventilation, air discharge, and / or air purification operation for a predetermined time is completed or that such an operation is not necessary, the process may proceed to step S270 to operate in a low power mode for a predetermined time. In one embodiment, the low power mode interrupts relatively high power operation (eg, operation of the driving fan 15 and / or display of the display 440) and the sensing operation of each sensor 220 according to a predetermined period. May be a mode.

As will be appreciated by those skilled in the art to which the present invention pertains, various modifications and variations are possible from the description of this specification. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined by the claims below and equivalents thereof.

10: base module 20: sensor module
30: filter module 40: main module
50: cover 60: connector

Claims (10)

As an indoor air monitoring device,
A cylindrical base module 10 having an upper opening and a vent formed at a side thereof;
A plurality of sensor modules 20 sequentially stacked on the base module 10 and each having a tubular shape;
A cylindrical main module 40 stacked on the topmost sensor module of the plurality of sensor modules; And
And a cover 50 stacked on the main module and covering the top of the main module.
Each sensor module includes at least one sensor capable of detecting at least one kind of harmful gas or fine dust, and the main module receives a detection signal of a sensor of each sensor module to calculate a concentration of harmful gas or fine dust. ,
Each of the base module, the plurality of sensor modules, the main module, and the cover are detachably coupled to each other,
Each of the plurality of sensor modules, the main module, and the cover is formed with a through hole penetrating up and down the center, so that air introduced into the vent of the base module can be discharged to the outside through the through hole of the cover. ,
The base module includes an electronic device module 100 having a control unit communicating with the sensor module and the main module, and an upper socket 19 for connecting with a sensor module and a connector coupled to an upper portion of the base module.
Each sensor module includes an electronic device module 200 having a control unit for receiving a sensing signal of a sensor and communicating with a base module, another sensor module, and a main module, a base module or another sensor coupled to a lower part of the sensor module. A lower socket 29a for connecting to a module and a connector, and an upper socket 29b for connecting to a connector with a main module or another sensor module coupled to the top of the sensor module,
The main module includes an electronic device module 400 having a control unit communicating with the base module and a sensor module, and a lower socket 49 for connecting to a sensor module and a connector coupled to a lower part of the main module.
When the indoor air monitoring device is powered on, the control unit of the main module,
Confirming the stacking order of the plurality of sensor modules coupled to the bottom of the main module, comparing the checked stacking order with a predetermined reference stacking order, and outputting notification information according to the comparison result by a display or voice. Indoor air monitoring device, characterized in that configured to perform. The method of claim 1,
Each of the sensor module and the main module,
A cylindrical inner wall 22 having a top and a bottom open and surrounding the through hole;
A cylindrical outer wall (21) having upper and lower openings surrounding the inner wall; And
And a support plate 23 connecting the inner wall and the outer wall.
Indoor air monitoring device, characterized in that the inner wall is formed with at least one vent hole penetrating the inner wall. delete The method of claim 2,
Further comprising a cylindrical filter module 30 detachably coupled to the bottom of the main module,
The filter module includes a through hole penetrating up and down the center and at least one air purification filter installed to cover the through hole. The method of claim 4, wherein
The filter module includes an electronic device module 300 having a control unit communicating with the base module, the sensor module, and the main module, and a lower socket 39a for connecting the sensor module and the connector coupled to the lower part of the filter module. And an upper socket (39b) for connecting with a main module and a connector coupled to the upper part of the filter module. The method of claim 5,
Checking the stacking order of the module, Indoor air monitoring device, characterized in that for confirming the stacking order of the plurality of sensor modules and filter modules coupled to the bottom of the main module. The method of claim 6,
A module identification number (ID) for identifying each of the base module, the plurality of sensor modules, the filter module, and the main module is assigned to each module,
Confirming the stacking order of the module,
Transmitting, by the controller of the main module, a positioning signal to the controller of the base module;
A control unit of the base module receiving the positioning signal transmits the position data including its module ID to a module stacked on top;
Until the main module receives the position data, the module receiving the position data adds its module ID to the position data and transmits it to the upper module thereof; And
And determining, by the main module that has received the position data, a stacking position of each sensor module and the filter module based on the received data. The method of claim 6, wherein the reference stacking order,
A first reference for laminating the filter module above all the sensor modules; And
And a second criterion for stacking a sensor module having a sensor that senses at least one of gas, smoke, and fine dust lighter than air, above the sensor module having a sensor that senses at least one of gas that is heavier than air. Indoor air monitoring device, characterized in that. The method of claim 2, wherein the base module,
A fan 15 for guiding air introduced into the ventilation hole of the base module toward the through hole of the cover; And
It further comprises a drive motor 17 for driving the fan,
The main module, the indoor air monitoring device, characterized in that configured to drive the fan by controlling the drive motor when the concentration of harmful gas or fine dust calculated from the detection signal of the sensor is higher than the reference concentration. The method of claim 2,
The electronic device module 400 of the main module further includes a communication unit for communicating with at least one of an external ventilation facility, an air discharge facility, and an air purification facility by wire or wirelessly.
The main module, when the concentration of harmful gas or fine dust calculated from the detection signal of the sensor is higher than the reference concentration, the communication unit to control the control signal for controlling one of the facilities of the ventilation facility, air discharge facility, and air purification facility Indoor air monitoring device, characterized in that configured to drive the facility by transmitting through.

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