KR102193222B1 - A system for automatically controlling the building - Google Patents

Abstract

The present invention relates to an automatic control system for a building. The automatic control system for a building (1000) comprises: a measurement device (100) installed in an indoor space or an outdoor space inside a building to measure radon concentration of at least the indoor space or the outdoor space; a control device (200) receiving the radon concentration measured by the measurement device (100) and generating and outputting a ventilation control signal based on the received radon concentration; and a ventilation device (400) turning on or off ventilation operation in accordance with the ventilation control signal outputted from the control device (200).

Description

Building automatic control system {A SYSTEM FOR AUTOMATICALLY CONTROLLING THE BUILDING}

The present invention relates to an automatic building control system, and more specifically, a building automatic control system that measures the radon concentration in the building and automatically implements ventilation of the building based on this, thereby reducing the management and operation cost of the building. It is an invention.

Radon is a naturally occurring radioactive gas, it is naturally present in soil or rock mass, and can occur naturally from uranium. Radon is a colorless, odorless inert gas. It is the heaviest among gases in nature. It does not react chemically with other substances, but it has the property of emitting radiation, so it may be physically unstable. In addition, radon adheres well to particulates such as dust and floats, and when breathing, it can enter human lungs through the respiratory tract.

Radon and its decay products accumulated in human lungs are transformed into other substances by releasing α-rays again, where α-rays destroy the DNA of lung cells, which is a major cause of lung cancer.

The Ministry of Education mandates radon measurement in classrooms at all levels, and requires the installation of fine dust detectors and air purifiers, but there are obvious limitations in removing radon using air purifiers. Accordingly, in practice, many sites use a method of removing radon through ventilation, and there is a disadvantage of being quite inefficient and cost-consuming because such ventilation is performed by a person.

In addition, there is no system that allows managers and operators to check the concentration of radon and fine dust in the building in real time, and therefore, it is insufficient to actively and quickly respond to potential dangerous situations that may occur in the building. .

Therefore, there is a need in the industry for a new type of building automatic control system capable of automatically implementing ventilation in the building according to the radon concentration measured at the same time while the manager/operator can monitor the radon concentration in a building such as a school in real time. It is a situation that is gradually increasing.

The present invention was conceived to solve the above problems, and the present invention automatically implements ventilation to reduce radon and fine dust in the building, thereby increasing user convenience and reducing related costs. It aims to provide a control system.

In addition, an object of the present invention is to provide a building automatic control system capable of further improving the control convenience of a manager or operator by enabling real-time monitoring of data on the measured radon concentration and fine dust concentration.

In addition, the present invention is based on the radon concentration measured in real time, based on a set schedule, or based on both the radon concentration and the set schedule, by controlling the on (ON) or off (OFF) of the ventilation system, It aims to provide a building automatic control system that enables versatility to be realized.

In addition, the present invention provides a building automatic control system capable of significantly reducing measurement-related costs by enabling measurement of the five indoor air quality elements of radon, fine dust, carbon dioxide, temperature and humidity with a single measuring device. It is aimed at.

In addition, the present invention sets different reference values for ON/OFF of the ventilation apparatus according to the direction in which the radon concentration increases and decreases, thereby making the activation time of the ventilation apparatus more efficient and cost effective. It aims to provide an automatic building control system that can be economically implemented.

The technical problems of the present invention are not limited to the technical problems mentioned above, and other technical problems that are not mentioned will be clearly understood by those skilled in the art from the following description.

Building automatic control system according to an embodiment of the present invention for solving the above technical problem, is installed indoors or outdoors in the building, at least a measuring device configured to measure the concentration of radon indoors or outdoors; A control device configured to receive the radon concentration measured by the measuring device and generate and output a ventilation control signal based on the received radon concentration; And a ventilation device configured to turn on or off a ventilation operation according to the ventilation control signal output from the control device.

In addition, the measuring device may be further configured to measure at least one of fine dust, carbon dioxide (CO2), temperature, and humidity.

In addition, it may further include a monitoring device configured to be communicatively coupled with the measuring device or the control device to monitor the radon concentration measured by the measuring device in real time.

In addition, the control device may be implemented as a direct digital controller (DDC).

In addition, the control device may include a first control unit configured to control ON or OFF of the ventilation device based on the real-time radon concentration measured by the measuring device.

In addition, the first control unit, when the measured real-time radon concentration is equal to or greater than a value obtained by adding half of the control range (DIF) to the target value (SP), the ventilation device is turned on (ON), and the measured When the real-time radon concentration is less than or equal to a value obtained by subtracting half of the control range DIF from the target value SP, the ventilation device may be programmed to be turned off.

In addition, the target value SP may be 2.5 pCi/L, and the control range DIF may be 1.

In addition, the control device receives and accumulates the radon concentration measured by the measurement device, sets a schedule based on the accumulated radon concentration, and turns on or off the ventilation device according to the set schedule. It may further include a second control unit configured to control (OFF).

In addition, the second control unit further comprises a machine learning unit configured to perform machine learning (ML) on the accumulated radon concentration, wherein the second control unit is configured to be configured by the machine learning unit. It may be further configured to set the schedule based on the machine learned radon concentration.

In addition, the control device may further include an active control unit configured to control whether at least one of the first control unit and the second control unit is activated.

According to the automatic building control system according to an embodiment of the present invention, by automatically implementing ventilation to reduce radon and fine dust in the building, it is possible to increase user convenience and reduce related costs.

In addition, according to the building automatic control system according to an embodiment of the present invention, it is possible to further improve the control convenience of a manager or an operator by enabling real-time monitoring of data related to the measured radon concentration and fine dust concentration.

In addition, according to the building automatic control system according to an embodiment of the present invention, on the basis of the radon concentration measured in real time, on the basis of a set schedule, or on the basis of both the radon concentration and the set schedule, ON or By controlling OFF, it is possible to implement a variety of ventilation control methods.

In addition, according to the building automatic control system according to an embodiment of the present invention, it is possible to measure the five indoor air quality elements of radon, fine dust, carbon dioxide, temperature and humidity with a single measuring device, thereby significantly reducing the cost related to measurement. It can be reduced.

In addition, according to the building automatic control system according to an embodiment of the present invention, the reference value for ON/OFF of the ventilation device is set differently according to the direction in which the radon concentration increases and decreases. By doing so, it is possible to realize the activation time of the ventilation device more efficiently and cost-effectively.

Brief description of each drawing is provided in order to more fully understand the drawings cited in the detailed description of the present invention.
1A is a schematic block diagram of an automatic building control system 1000 according to an embodiment of the present invention, and FIG. 1B is a schematic block diagram of an automatic building control system 1000 according to another embodiment of the present invention. Shows.
2A is a detailed block diagram of a measuring device 100 according to an embodiment of the present invention, and FIG. 2B is an exemplary diagram of the measuring device 100 of FIG. 2A.
3A is a detailed block diagram of the control device 200 according to an embodiment of the present invention, and FIG. 3B is an exemplary view of the control device 200 of FIG. 3A.
4A is a schematic diagram of an input/output circuit implementing ON/OFF control based on a detected value in the first control unit 210 according to an embodiment of the present invention, and FIG. 4B is Accordingly, it is a graph for explaining the operation of controlling the on (ON) / off (OFF) of the ventilation device 400.
5A is a schematic diagram of an input/output circuit implementing schedule-based ON/OFF control in the second control unit 220 according to a further embodiment of the present invention, and FIG. 5B is a machine of detection values. It is a flow chart for explaining a method of setting a schedule based on learning, and FIG. 5C is a graph showing a change in radon concentration over time.

Hereinafter, embodiments according to the present invention will be described with reference to the accompanying drawings. In adding reference numerals to elements of each drawing, it should be noted that the same elements are assigned the same numerals as possible even if they are indicated on different drawings. In addition, in describing an embodiment of the present invention, if it is determined that a detailed description of a related known configuration or function obstructs an understanding of the embodiment of the present invention, a detailed description thereof will be omitted. In addition, embodiments of the present invention will be described below, but the technical idea of the present invention is not limited thereto or is not limited thereto, and may be modified and variously implemented by those skilled in the art.

Throughout the specification, when a part is said to be "connected" with another part, this includes not only "directly connected" but also "indirectly connected" with another element interposed therebetween. . Throughout the specification, when a part "includes" a certain component, it means that other components may be further included rather than excluding other components unless otherwise stated. In addition, in describing the constituent elements of the embodiment of the present invention, terms such as first, second, A, B, (a), (b) may be used. These terms are only used to distinguish the component from other components, and the nature, order, or order of the component is not limited by the term.

1A is a schematic block diagram of an automatic building control system 1000 according to an embodiment of the present invention, and FIG. 1B is a schematic block diagram of an automatic building control system 1000 according to another embodiment of the present invention. Shows.

1A and 1B, the building automatic control system 1000 according to an embodiment of the present invention includes a measuring device 100, a control device 200, a monitoring device 300, and a ventilation device 400. It can be composed of.

The measuring device 100 may be installed indoors or outdoors in a building to measure at least one of radon concentration, fine dust concentration, carbon dioxide concentration, temperature, and humidity inside or outside the building.

The control device 200 is communicatively coupled with the measuring device 100 to receive the ranon concentration measured by the measuring device 100, and generate and output a ventilation control signal based on the received radon concentration. have.

The monitoring device 300 may be communicatively coupled with the measurement device 100 and/or the control device 200 to monitor the ranon concentration measured by the measurement device 100 in real time.

The ventilation device 400 is communicatively coupled with the control device 200 (in the case of FIG. 1A), or communicatively coupled with the monitoring device 300 (in the case of FIG. 1B), and output from the control device 200 The ventilation operation may be configured to be turned on or off according to the ventilation control signal.

Hereinafter, the measurement device 100, the control device 200, the monitoring device 300, and the ventilation device 400 constituting the automatic building control system 1000 according to an embodiment of the present invention will be described in more detail. I will do it.

The measuring device 100 may be installed indoors or outdoors in a building to measure at least one of radon concentration, fine dust concentration, carbon dioxide concentration, temperature, and humidity inside or outside the building. 2A is a detailed block diagram of a measuring device 100 according to an embodiment of the present invention, and FIG. 2B is an exemplary diagram of the measuring device 100 of FIG. 2A.

As shown in FIG. 2A, the measuring apparatus 100 according to an embodiment of the present invention includes a sensor unit 110, a display unit 120, a mode switching unit 130, an alarm unit 140, and , Communication unit 150, and the like. For reference, each element (110, 120, 130, 140, 150) of the measuring device 100 shown in Figure 2a is an exemplary element for explaining the function, operation, etc. of the measuring device 100 according to the present invention. However, it will be apparent that additional elements (eg, power supply, storage, fan, etc.) may be additionally provided.

The sensor unit 110 may be configured to measure various air quality elements indoors or outdoors in a building, and as shown in FIG. 2A, a radon sensor 111, a fine dust sensor 112, a carbon dioxide sensor 113, a temperature It may include a sensor 114, a humidity sensor 115, and the like. In the following specification, the sensor unit 110 according to an embodiment of the present invention is exemplarily described as measuring five air quality elements such as radon, fine dust, carbon dioxide, temperature and humidity, but other implementations of the present invention The sensor unit 110 according to the example may be configured to measure at least some of the five air quality elements mentioned above, or may be configured to additionally measure an additional air quality element other than the five air quality elements mentioned above.

The radon concentration, fine dust concentration, carbon dioxide concentration, temperature and humidity measured by the sensor unit 110 may be independently transmitted to the control device 200 and/or the monitoring device 300 and stored individually, and thus It is possible for the control device 200 to independently control the ventilation device 400 for each of the five air quality elements detected.

For reference, the radon sensor 111 may have a measurement range of 0.1 to 99.9 pCi/L, and may have a measurement method of a pulse ionization chamber. The fine dust sensor 112 may be PM2.5 or PM10, and may have a method of measuring laser particle scattering. The carbon dioxide sensor 113 may have a measurement range of 400 to 7,000 ppm, and may have a non-dispersive infrared (NDIR) measurement method. The temperature sensor 114 may have a measurement range of -40 to 120 degrees, and the humidity sensor 115 may have a measurement range of 0 to 100%. The measurement range and measurement method of each of the above-described sensors 111, 112, 113, 114, 115 only correspond to the exemplary range and method describing the sensor unit 110 according to the present invention, and therefore, measurement different from that described above. It will be apparent that ranges and/or can be implemented in different ways of measurement.

As shown in FIG. 2A, the measuring apparatus 100 according to an embodiment of the present invention may further include a display unit 120. The display unit 120 may be implemented as an LCD display panel, for example, and a value measured by the sensor unit 110 may be displayed in real time on the display unit 120. Here, since five air quality elements are simultaneously measured by the sensor unit 110, it is possible to control which measurement value is displayed on the display unit 120, and for this purpose, the measurement device 100 according to an embodiment of the present invention A mode conversion unit 130 may be additionally provided.

That is, the mode switching unit 130 is between an interface mode in which all five measurement values are simultaneously displayed on the display unit 120 and an interface mode in which only one of the five measurement values is displayed on the display unit 120. , Allows the operator or administrator to switch the operating mode.

In the former case, the building operator or manager has the advantage of being able to visually check the five air quality elements currently being measured by the sensor unit 110 at the same time, and in the latter case, the operator or manager is an air quality element that requires particular attention or attention. For example, there is an advantage of being able to visually check only the radon concentration more carefully.

In addition, the measurement device 100 according to a further embodiment of the present invention may further include an alarm unit 140 configured to output a predetermined alarm when the measured value exceeds a preset threshold, and , Here, the alarm may be implemented as a visual alarm or an audible alarm. For example, the radon concentration of the control device 200 according to the present invention controls the on (ON) or off (OFF) of the ventilation device 400 based on the measured radon concentration, thereby controlling the radon concentration indoors or outdoors in the building. It is characterized in that it prevents the increase to a concentration that is dangerous to the human body.When an error occurs in the operation of the control device 200 and/or the ventilation device 400, and the normal ventilation is not properly implemented, the radon concentration in the building is appropriate. It may not be controlled properly and may exceed a pre-set threshold.

In this case, the alarm unit 140 of the measuring device 100 outputs a predetermined alarm when the measured radon concentration exceeds a pre-set threshold, so that the building manager or operator can immediately recognize it. . Such an alarm output from the alarm unit 140 may be visually displayed on the display unit 120, for example, or audibly displayed through a speaker (not shown) provided in the measurement device 100. , By being transmitted to the monitoring device 300 through wireless communication such as Wi-Fi, the building manager or operator may immediately recognize the fact of the danger of radon concentration.

In addition, the measuring device 100 according to an embodiment of the present invention may further include a communication unit 150, and the value measured by the sensor unit 110 is transmitted to the control device 200 through the communication unit 150. ) And/or may be delivered to the monitoring device 300. The communication unit 150 may be a unit that enables short-range wireless communication such as Wi-Fi, Bluetooth, or the like, or, in some cases, performs wired communication with the control device 200 and/or the monitoring device 300. It may be a unit that makes it possible.

For reference, the communication unit 150 is a LAN, WCDMA (Wideband Code Division Multiple Access), LTE (Long Term Evolution), WiBro (Wireless Broadband Internet), RF (Radio Frequency) communication, wireless LAN (Wireless LAN) , Wi-Fi (Wireless Fidelity), NFC (Near Field Communication), Bluetooth, infrared communication, etc. can communicate. However, this is exemplary, and various wired and wireless communication technologies applicable in the art may be used according to an embodiment to which the present invention is applied.

In addition, although not explicitly shown in FIG. 2A, the measuring device 100 may be able to connect to a smartphone and the Internet, and data (eg, the value of the indoor air quality factor measured by the sensor unit 110, A memory unit capable of storing, etc.) may be further included, and a fan may be additionally mounted to prevent device failure due to internal high temperature.

The control device 200 is communicatively coupled with the measuring device 100 to receive the ranon concentration measured by the measuring device 100, and generate and output a ventilation control signal based on the received radon concentration. have. The connection between the measurement device 100 and the control device 200 may use, for example, RS-485 serial communication, which is a half-duplex communication method, but is not limited thereto.

The control device 200 according to an embodiment of the present invention may be implemented as a direct digital controller (DDC). For reference, DDC is one of the controllers used for automatic building control, and it is not intended to manipulate the device while directly checking the operation status of the device near field devices, or to directly read and judge analog values, but to a specific location (central monitoring panel, It is a system that can directly control devices in the field with digital values or communication in the disaster prevention room, etc.).

For reference, DDC composed of semiconductor devices including highly integrated circuits can control various input/output devices in the field by arranging eDC-1200 as a CPU module and combining it with an expansion module, and more than 50 built-in function blocks ( Function Block) can be set to control heat sources and air conditioning facilities. In addition, in consideration of point expandability, up to 16 expansion modules can be connected by RS-485 2-wire system, and expansion modules can be mixed and used according to the type and quantity of control points.

A detailed block diagram of the control device 200 according to an embodiment of the present invention that can be implemented with DDC is shown in FIG. 3A, and FIG. 3B is an exemplary view of the control device 200 of FIG. 3A. As shown in FIG. 3A, the control device 200 according to an embodiment of the present invention includes a first control unit 210, a second control unit 220, a lighting unit 230, and a memory unit 240. ), an active control unit 250, a communication unit 260, and the like. For reference, each element (210, 220, 230, 240, 250, 260) of the control device 200 shown in FIG. 3A is an exemplary for explaining the function, operation, etc. of the control device 200 according to the present invention. It is only an element, and it will be apparent that additional elements (eg, power supply, etc.) may be additionally provided.

For reference, the measuring device 100 according to an embodiment of the present invention measures at least one of radon, fine dust, carbon dioxide, temperature, and humidity, and the control device 200 controls the ventilation device 400 based on the measured value. ) Activation, that is, on (ON) or off (OFF), in the present specification below, on (ON) or off (OFF) of the ventilation device 400 based on the measured radon concentration Although the controlling embodiment is exemplarily described, the same or substantially the same operation mechanism may be applied to fine dust, carbon dioxide, temperature and humidity.

The first control unit 210 may be configured to control ON or OFF of the ventilation apparatus 400 based on the real-time radon concentration measured by the measurement device 100. That is, the first control unit 210 according to the present invention is directly based on the real-time radon concentration measured by the radon sensor 111 of the sensor unit 110 in the measurement device 100, more specifically, the ventilation device 400 ) To control the ventilation operation in the building, and preferably, the activation time of the ventilation device 400 may be determined so as not to exceed the radon concentration determined to be harmful to humans. A detailed operation of the first control unit 210 controlling the on/off of the ventilation device 400 based on the detected value by the sensor unit 110 will be described in more detail with reference to FIGS. 4A and 4B below. Do it.

The second control unit 220 receives and accumulates the radon concentration measured by the measurement device 100, sets a schedule based on the accumulated radon concentration, and turns on the ventilation device 400 according to the set schedule. ON) or off (OFF) can be configured to control. That is, the second control unit 220 according to the present invention is not directly based on the real-time radon concentration measured by the radon sensor 111 of the sensor unit 110 in the measurement device 100, but is set It is characterized in that the ventilation operation in the building by the ventilation device 400 is controlled based on the schedule, and the set schedule is, for example, an accumulated radon concentration value, preferably a predetermined value change pattern to ensure reliability. It can be based on accumulated radon concentration values over a long enough period of time. A detailed operation of the second control unit 220 controlling the on/off of the ventilation device 400 based on the set schedule will be described in more detail with reference to FIGS. 5A to 5C below.

In the control device 200 according to the present invention to control the on (ON) or off (OFF) of the ventilation device 400, the first control unit based on the real-time radon concentration measured by the measuring device 100 ( 210) and the second control unit 220 based on the set schedule, an administrator or an operator may determine which unit to activate and use. To this end, the control device 200 according to a further embodiment of the present invention is an active control unit It may further include (250).

That is, the active control unit 250 according to the present invention activates only the first control unit 210 and turns on or off the ventilation device 400 based on the real-time radon concentration measured by the measurement device 100. OFF), or by activating only the second control unit 220 to control ON or OFF of the ventilation device 400 according to a set schedule, or the first control unit 210 ) And the second control unit 220 may be activated to control the on (ON) or off (OFF) of the ventilation device 400 based on both the real-time radon concentration measured by the measurement device 100 and a set schedule. have.

Here, when both the first control unit 210 and the second control unit 220 are activated, whether the ventilation device 400 is turned on or off by the first control unit 210 and the second control unit 220 ), the on/off status of the ventilation device 400 may be different (that is, the ventilation control signals collide with each other), in which case the first control unit 210 and the second control unit 220 have a predetermined priority. The control device 200 may appropriately control the operation of the ventilation device 400 according to the priority. Preferably, the priority of the first control unit 210 that controls ON or OFF of the ventilation device 400 based on the real-time radon concentration measured by the measuring device 100 is set It may be set higher than the priority of the second control unit 220 that controls the on (ON) or off (OFF) of the ventilation device 400 on the basis of.

Accordingly, the priority of the first control unit 210 may be assigned higher than the priority of the second control unit 220, and the on/off of the ventilation device 400 by the first control unit 210 When whether or not the ventilation device 400 is turned on/off by the second control unit 220 is different, the ventilation device 400 is controlled according to the ventilation control signal output from the first control unit 210 having a higher priority. You can control ON or OFF.

The lighting unit 230 corresponds to the control device 200, that is, a unit indicating the operation state of the DDC, and may be implemented as an LED, for example. The lighting unit 230 can be largely divided into a driving LED and a status LED, and the driving LED can blink when the function block is operating, and the status LED is green during normal operation and yellow when communication is abnormal. , When the DDC operation is not possible, it may be displayed in red. Through the lighting unit 230 disposed in the left area of the control device 200 illustrated in FIG. 3B, the manager or operator can visually easily check whether the device is operating normally or whether there is a malfunction.

The memory unit 240 may each store a plurality of measurement values measured by the measurement device 100 and transmitted to the control device 200. Data on radon concentration, fine dust concentration, carbon dioxide concentration, temperature, and humidity may each be independently stored in the memory unit 240, and accordingly, the first control unit 210 and/or the second control unit 220 It is possible to independently control the operation of the ventilation device 400 based on each of these five air quality factors.

For reference, the memory unit 240 is a hard disk drive (HDD), a read only memory (ROM), a random access memory (RAM), an electrically erasable and programmable read only memory (EEPROM), as known to a person skilled in the art. Various types of storage devices capable of input and output of information such as flash memory, CF (Compact Flash) card, SD (Secure Digital) card, SM (Smart Media) card, MMC (Multimedia) card, or memory stick It may be implemented as, and may be provided inside the control device 200 as shown in FIG. 3A, or may be provided in a separate external device. Alternatively, the memory unit 240 may be replaced with web storage that performs a storage function on the Internet.

The communication unit 260 may be configured to communicate with at least one of the measuring device 100, the monitoring device 300, and the ventilation device 400. For reference, the communication unit 260 is a LAN, WCDMA (Wideband Code Division Multiple Access), LTE (Long Term Evolution), WiBro (Wireless Broadband Internet), RF (Radio Frequency) communication, wireless LAN (Wireless LAN) , Wi-Fi (Wireless Fidelity), NFC (Near Field Communication), Bluetooth, infrared communication, etc. can communicate. However, this is exemplary, and various wired and wireless communication technologies applicable in the art may be used according to an embodiment to which the present invention is applied.

The monitoring device 300 may be configured to be communicatively coupled with the control device 200 to monitor data on the five indoor air quality elements measured by the measuring device 100 in real time, or directly with the measuring device 100. It may be configured to be communicatively coupled to monitor data on five indoor air quality elements measured by the measurement device 100 in real time.

The monitoring device 300 may correspond to a device such as a PC or a smartphone, and when the monitoring device 300 is communicated with the control device 200, real-time monitoring may be implemented as a PC/smart phone app service for the administrator. I can.

The ventilation device 400 may be communicatively coupled with the control device 200 and the operation may be controlled according to the ventilation control signal output from the control device 200 (in the case of FIG. 1A), or the ventilation device 400 The monitoring device 300 may be communicatively coupled and the operation may be controlled by PC control or smartphone control by the monitoring device 300 (in the case of FIG. 1B).

For reference, the ventilation device 400 according to an embodiment of the present invention may be implemented as an Electric Heat Pump (EHP) system, a Gas engine Heat Pump (GHP) system, a School Indoor Ventilation System (SIV), etc. However, it is not limited thereto.

4A is a schematic diagram of an input/output circuit implementing ON/OFF control based on a detected value in the first control unit 210 according to an embodiment of the present invention, and FIG. 4B is Accordingly, it is a graph for explaining an operation of controlling the on/off (OFF) of the ventilation device 400.

As already described, the first control unit 210 according to an embodiment of the present invention turns on or off the ventilation device 400 based on the real-time radon concentration measured by the measurement device 100. ), the first control unit 210 may have inputs of PV (radon concentration value), SP (target value), and DIR (control direction), as shown in FIG. 4A, and is shown in the figure. It is not possible, but it can have additional input of DIF (control range).

In addition, as shown in FIG. 4A, the first control unit 210 may have an output of OUT (ventilation control signal, ON or OFF). For reference, PV, SP, and DIF may be implemented as analog values, and DIR and DIF may be implemented as digital values.

For reference, the current recommended indoor radon standard in Korea is 4 pCi/L (= 148 Bq/m3) (Reference: 1 pCi (Picocurie) = 37 Bq (Becquerel)), and in the present invention, the radon concentration in the building is measured in real time. By measuring, the radon concentration in the building is predicted in advance, and accordingly, the ventilation device 400 is operated in advance before the radon concentration in the building reaches 4 pCi/L.

More specifically, the control device 200 according to an embodiment of the present invention automatically controls the ventilation control signal in the DCC when the radon concentration detected in real time reaches 3 pCi/L so that the ventilation device 400 is operated. , When the radon concentration detected in real time reaches 2 pCi/L, the ventilation control signal in the DCC is automatically controlled to stop the ventilation device 400, thereby preventing the radon concentration in the building from reaching 4 pCi/L. At the same time, when the radon concentration is relatively low, power consumption can be reduced by deactivating the ventilation device 400.

An operation of controlling ON/OFF of the ventilation device 400 according to the radon concentration based on this control algorithm is shown as a graph in FIG. 4B. As shown in FIG. 4B, the upper limit (UL) and the lower limit (LL) for on (ON) or off (OFF) of the ventilation device 400 may be set to 3 and 2, respectively, using the radon concentration as a PV variable. Accordingly, the SP (target value) can be set to 2.5, which is the intermediate value between the upper limit (UL) and the lower limit (LL), and the DIF (control range) defined as the difference between the upper limit (UL) and the lower limit (LL) is 1 It may be set to (for example, see the upper right of FIG. 4B). For reference, the operation control of the ventilation device 400 by the first control unit 210 according to an embodiment of the present invention is in a forward control mode in which the ventilation device 400 is turned on as the radon concentration increases. Corresponds to this, and thus DIR (control direction) may be set to 0 (for example, see the lower left corner of FIG. 4B).

More specifically, the first control unit 210 according to the present invention turns on the ventilation device 400 when the measured real-time radon concentration is greater than or equal to a value obtained by adding half of the control range DIF to the target value SP. ), and when the measured real-time radon concentration is less than or equal to a value obtained by subtracting half of the control range DIF from the target value SP, the ventilation device 400 may be programmed to be OFF. As shown in FIG. 4B, in the direction in which the radon concentration (PV) increases, the output (OUT) of ON when the radon concentration (PV) reaches the upper limit (UL), for example, 3 pCi/L. By being exposed, the ventilation device 400 operates, and in the direction in which the radon concentration (PV) decreases, the output of OFF when the radon concentration (PV) reaches the lower limit (LL), for example, 2 pCi/L. When (OUT) is expressed, the ventilation device 400 may be prevented from operating.

For reference, the numerical values described in FIG. 4B are only exemplary numerical values for describing the on/off control of the ventilation device 400 by the first control unit 210, and the illustrated values of 1.0, 2.0, 2.5, 3 and It will be clear that different numbers can be used as a rule.

5A is a schematic diagram of an input/output circuit implementing schedule-based ON/OFF control in the second control unit 220 according to a further embodiment of the present invention, and FIG. 5B is a machine of detection values. It is a flow chart for explaining a method of setting a schedule based on learning, and FIG. 5C is a graph showing a change in radon concentration over time.

Unlike the first control unit 210 that controls ON or OFF of the ventilation device 400 based directly on the real-time radon concentration measured by the measuring device 100, a further embodiment of the present invention The second control unit 220 according to may control the operation of the ventilation device 400 according to a set schedule.

More specifically, the second control unit 220 receives and accumulates the radon concentration measured by the measuring device 100, sets a schedule based on the accumulated radon concentration, and the ventilation device 400 according to the set schedule. It may be configured to control ON or OFF, wherein the second control unit 220 is a machine learning unit 221 configured to perform machine learning (ML) on the accumulated radon concentration. , See FIG. 3A ), and the second control unit 220 may be configured to set a schedule based on the radon concentration machine-learned by the machine learning unit 221.

The input/output circuit of the second control unit 220 is input as input: SP1 (output value at the start of the schedule), SP2 (output value at the end of the schedule), S_MON (start month), S_DAY (start date or day of the week), S_HOUR ( Start time), S_MIN (start minute), S_SEC (start second), R_DAY (operation date), R_HOUR (operation time), R_MIN (operation minute), R_SEC (operation second), etc. ) Or off (OFF).

As shown in FIG. 5B, the second control unit 220 may receive and accumulate the radon concentration measured by the measuring device 100 (S510) and store it in the memory unit 240, and the machine learning unit 221 ) May perform machine learning based on the accumulated radon concentration (S520), and a predetermined schedule may be set based on the machine learned radon concentration (S530). For reference, machine learning is a field of artificial intelligence (AI) that develops algorithms and technologies that enable computers to perform appropriate tasks on new data based on what they learn using multiple data. Machine learning can be classified into supervised learning (supervised learning), semi-supervised learning, unsupervised learning (self-learning), and reinforcement learning. The machine learning unit 221 according to the present invention may perform learning on the accumulated radon concentration according to any one of supervised learning, semi-supervised learning, unsupervised learning, and reinforcement learning.

For reference, the schedule used by the second control unit 220 to control the operation of the ventilation device 400 may have a control period such as every minute, every hour, every day, weekly, monthly, yearly, etc., and the control device 200 ), up to 64 schedules may be stored and utilized in the memory unit 240.

For example, when the radon concentration is accumulated for a long period of time enough to ensure the reliability of a predetermined value change pattern, a graph as shown in FIG. 5C may be derived, and the machine learning unit 221 is continuous and continuous. Through machine learning, it is possible to learn that the indoor radon concentration in the building has a constant pattern of change at a constant cycle, for example, on a daily basis.

In the example of FIG. 5C, the machine learning unit 221 may perform machine learning on the radon concentration that increases or decreases on a daily basis, and (i) the radon concentration gradually decreases at 8 am Radon concentration reaches 2 pCi/L, (ii) radon concentration increases gradually from noon to dawn, and radon concentration reaches 3 pCi/L at 7 p.m., through continuous learning of this pattern in the morning. It is possible to set a schedule for turning off the ventilation device 400 at 8 o'clock and turning on the ventilation device 400 again at 7 PM.

Here, a schedule set as a result of learning the accumulated radon concentration may be patterned in a plurality of cycles. For example, as shown as an example in FIG. 5C, the radon concentration in the building is learned to have a constant pattern in units of'day', and at the same time, the pattern is repeated equally or similarly in units of'months' or'years'. Can be. In this case, the second control unit 220 according to an embodiment of the present invention controls the ventilation operation of the ventilation device 400 on the basis of a daily schedule, but also considers a monthly or yearly schedule. The ventilation operation of 400 can be controlled. Here, the plurality of periods may include at least a first period and a second period, where the first period (eg, one day) may be a time division period within the second period (eg, month or year). have.

Such a schedule for controlling the on/off operation of the ventilation device 400 may be directly set by a device manager or an operator, but the second control unit 220 according to an embodiment of the present invention relates to the accumulated radon concentration. By setting the schedule using the result of machine learning, it is possible to implement more accurate and more reliable control of the ventilation device 400.

When both the first control unit 210 and the second control unit 220 are activated and used by the active control unit 250 of the control device 200, the ventilation control signal by the first control unit 210 and the The ventilation control signals by the second control unit 220 may not match each other. For example, in a schedule set based on machine learning of the accumulated radon concentration, the ventilation device 400 is turned off because the radon concentration has a low value (for example, 1.2 pCi/L) at 1 pm. Although it is determined that it is determined that the radon concentration measured by the sensor unit 110 at 1 pm actually has a value higher than the upper limit (UL), for example, 3.5 pCi/L, the ventilation device 400 is turned on. As a result, a collision between the two ventilation control signals may occur.

In this case, the collision of different control signals may be eliminated according to a preset priority of the first control unit 210 and the second control unit 220, and the priority of the first control unit 210 is preferably It may be higher than the priority of the second control unit 220. Therefore, when it is determined that the radon concentration actually measured by the measuring device 100 needs ventilation at a time when it is determined that the radon concentration is relatively safe according to the set schedule, the control device 200 according to an embodiment of the present invention ) Gives a higher priority to the first control unit 210 to turn on the ventilation device 400 so that the radon concentration does not exceed 4 pCi/L, which is the recommended radon standard in the building.

As described above, according to the automatic building control system according to an embodiment of the present invention, by automatically implementing ventilation to reduce radon and fine dust in the building, it is possible to increase user convenience and reduce related costs. have.

In addition, according to the building automatic control system according to an embodiment of the present invention, it is possible to further improve the control convenience of a manager or an operator by enabling real-time monitoring of data related to the measured radon concentration and fine dust concentration.

In addition, according to the building automatic control system according to an embodiment of the present invention, on the basis of the radon concentration measured in real time, on the basis of a set schedule, or on the basis of both the radon concentration and the set schedule, ON or By controlling OFF, it is possible to implement a variety of ventilation control methods.

In addition, according to the building automatic control system according to an embodiment of the present invention, it is possible to measure the five indoor air quality elements of radon, fine dust, carbon dioxide, temperature and humidity with a single measuring device, thereby significantly reducing the cost related to measurement. It can be reduced.

In addition, according to the building automatic control system according to an embodiment of the present invention, the reference value for ON/OFF of the ventilation device is set differently according to the direction in which the radon concentration increases and decreases. By doing so, it is possible to realize the activation time of the ventilation device more efficiently and cost-effectively.

As described above, an optimal embodiment has been disclosed in the drawings and specifications. Although specific terms have been used herein, these are used only for the purpose of describing the present invention, and are not used to limit the meaning or the scope of the present invention described in the claims. Therefore, those of ordinary skill in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true technical scope of the present invention should be determined by the technical spirit of the appended claims.

1000: Building automatic control system
100: measuring device
110: sensor unit
120: display unit
130: mode switching unit
140: alarm unit
150: communication unit
200: control device
210: first control unit
220: second control unit
230: lighting unit
240: memory unit
250: active control unit
260: communication unit
300: monitoring device
400: ventilation device

Claims (10)

As a building automatic control system 1000,
A measuring device (100) installed indoors or outdoors in a building and configured to measure at least the indoor or outdoor radon concentration;
A control device 200 configured to receive the radon concentration measured by the measuring device 100 and generate and output a ventilation control signal based on the received radon concentration; And
And a ventilation device 400 configured to turn on or off a ventilation operation according to the ventilation control signal output from the control device 200,
The control device 200,
A first control unit 210 configured to control on (ON) or off (OFF) of the ventilation device 400 based on the real-time radon concentration measured by the measurement device 100;
Receives and accumulates the radon concentration measured by the measuring device 100, sets a schedule based on the accumulated radon concentration, and turns on or off the ventilation device 400 according to the set schedule. OFF) a second control unit 220 configured to control; And
And an active control unit 250 configured to control whether at least one of the first control unit 210 and the second control unit 220 is activated,
In the direction in which the radon concentration increases, the first control unit 210 turns on the ventilation device 400 when the measured real-time radon concentration exceeds the upper limit UL, and the radon concentration decreases. In is further configured to turn off (OFF) the ventilation device 400 when the measured real-time radon concentration is less than the lower limit (LL),
Both the first control unit 210 and the second control unit 220 are activated by the active control unit 250 and the ventilation device 400 is turned on by the first control unit 210. ) Or off (OFF) is different from the on (ON) or off (OFF) of the ventilation device 400 by the second control unit 220, the first control unit 210 and the second control On (ON) or off (OFF) of the ventilation device 400 is controlled based on a preset priority of the unit 220,
Building automatic control system (1000). The method of claim 1,
The measuring device 100 is further configured to measure at least one of fine dust, carbon dioxide (CO2), temperature and humidity,
Building automatic control system (1000). The method of claim 1,
Further comprising a monitoring device 300 configured to be communicatively coupled with the measurement device 100 or the control device 200 to monitor the radon concentration measured by the measurement device 100 in real time,
Building automatic control system (1000). The method of claim 1,
The control device 200 is implemented as a DDC (Direct Digital Controller),
Building automatic control system (1000). delete The method of claim 1,
The upper limit (UL) corresponds to a value obtained by summing half of the control range (DIF) to the target value (SP), and the lower limit (LL) is the target value (SP) by subtracting half of the control range (DIF). Corresponding to one value,
Building automatic control system (1000). The method of claim 6,
The target value (SP) is 2.5 pCi / L, characterized in that the control range (DIF) is 1,
Building automatic control system (1000). delete The method of claim 1,
The second control unit 220 further includes a machine learning unit 221 configured to perform machine learning (ML) on the accumulated radon concentration,
The second control unit 220 is further configured to set the schedule based on the radon concentration machine learned by the machine learning unit 221,
Building automatic control system (1000). delete

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