KR102477961B1 - Ventilation control system unsing laser sensor, and applicable to bas, bems, fms and si - Google Patents

Abstract

The present invention relates to a ventilation control system. According to an embodiment of the present invention, the ventilation control system comprises: a light emission unit installed in a target indoor space, and emitting laser; a light reception unit receiving the laser; a ventilation fan ventilating the indoor space; a fine dust sensor installed at a position in the target indoor space and measuring the fine dust concentration of the position; and a main control apparatus operating the ventilation fan if the intensity of radiation of the laser received by the light reception unit exceeds a certain value or if the concentration of fine dust measured by the fine dust sensor exceeds a specific value, and stopping the ventilation fan if the intensity of radiation of the laser received by the light reception unit is equal to or lower than the certain value or if the concentration of fine dust measured by the fine dust sensor is equal to or lower than the specific value. The main control apparatus operates the ventilation fan after the status, where the intensity of radiation of the laser received by the light reception unit exceeds the certain value or the concentration of fine dust measured by the fine dust sensor exceeds the specific value, persists for a certain period of time or longer, and operates the ventilation fan for at least a certain period of time. Therefore, electricity can be saved.

Description

Ventilation control system applicable to BAS, BEMS, FMS and SI and using a laser sensor {VENTILATION CONTROL SYSTEM UNSING LASER SENSOR, AND APPLICABLE TO BAS, BEMS, FMS AND SI}

The present invention relates to a ventilation control system for ventilating a room, and more particularly, to a ventilation control system applicable to BAS, BEMS, FMS and SI and using a laser sensor.

In general, building facilities such as air conditioners, boilers, pumps, etc. for maintaining indoor air in a state suitable for the purpose of use by adjusting the temperature, humidity and cleanliness of indoor air in medium and large buildings such as office buildings, public institution buildings, and apartments. is built

In the case of these facilities, indoor air is generally circulated to the outside by using a ventilation device including a ventilation fan such as an air supply fan and an exhaust fan to maintain a good indoor air condition. Existing ventilation systems have a problem of increasing electricity consumption by continuously operating a ventilation fan.

Republic of Korea Utility Model Publication No. 20-2010-0011688 (2010. 12. 01.)

The present invention is to solve the above technical problems, and an object of the present invention is to provide a ventilation control system capable of operating or stopping a ventilation fan according to air quality.

Another object of the present invention is to provide a ventilation control system capable of saving electricity.

Ventilation control system according to an embodiment of the present invention is installed in the target room, the light emitting unit for emitting a laser; a light receiving unit for receiving the laser light; a ventilation fan that ventilates the target room; a fine dust sensor installed at one location in the target room and measuring the concentration of fine dust at the one location; and when the amount of laser light received by the light receiving unit exceeds a certain value or the fine dust concentration measured by the fine dust sensor exceeds a specific value, the ventilation fan is operated, and the amount of laser light received by the light receiving unit reaches the certain value. and a main control device for stopping the ventilation fan when the fine dust concentration measured by the fine dust sensor is less than or equal to the specific value, wherein the main control device includes a laser light amount received by the light receiving unit exceeding the predetermined value. Alternatively, the ventilation fan is operated after a state in which the fine dust concentration measured by the fine dust sensor exceeds the specific value is maintained for a predetermined time or longer, and the ventilation fan is operated for at least a predetermined period of time.

It is installed at a position spaced apart from the light emitting part and further includes a reflector for reflecting the laser, and the laser reflected by the reflector may be received by the light receiver.

The target room is divided into a plurality of spaces, and a plurality of the light emitting unit, the light receiving unit, the fine dust sensor, and the ventilation fan are provided to correspond to the space, respectively, and the main control device independently controls the light receiving unit for each space. The ventilation fan may be controlled according to the amount of light received from and the fine dust concentration measured by the fine dust sensor.

The main control device may include: a storage unit for storing data of the operating time of the ventilation fan, the amount of light, and the concentration of fine dust measured by the fine dust sensor over time; and a display unit outputting data stored in the storage unit.

Ventilation control system according to the present invention can start or stop the ventilation fan according to the air quality.

In addition, the ventilation control system according to the present invention can save electricity.

1 is a block diagram showing the configuration of a ventilation control system according to an embodiment of the present invention.
2 is an example of implementing the ventilation control system of FIG. 1 .
FIG. 3 is a view showing an installation example of a light emitting unit, a light receiving unit, a reflector, and a fine sensor shown in FIG. 2 .
FIG. 4 is a plan view illustrating an example in which the light emitting unit, the light receiving unit, the reflector, the fine dust sensor, and the ventilation fan of FIG. 2 are installed in a room partitioned into a plurality of spaces.
5 is a block diagram showing an example of the main control device of FIG. 1 .
6 is a view showing an example of outputting the amount of light measured by each light receiving unit to a display unit.
7 is a view showing an example in which operating times of each ventilation fan are output to a display unit.

Hereinafter, embodiments of the present invention will be described clearly and in detail to the extent that those skilled in the art can easily practice the present invention.

According to an embodiment of the present invention, the ventilation control system applicable to BAS, BEMS, FMS, and SI controls a ventilation fan for lighting a room by using a laser sensor and a separate fine dust sensor.

BAS (Building Automation System) refers to a system that controls management functions such as heating, cooling, lighting, and crime prevention of large buildings with a dedicated management computer installed in a control room. It refers to a system that implements energy saving by analyzing and providing optimal operation information for facilities and building energy-related operating devices and establishing optimal management power. In the present invention, BEMS can be implemented using a laser sensor and a separate fine dust sensor. be able to FMS (Facility Management System) refers to a facility management system for systematically managing and operating servers, networks, and computer equipment.

1 is a block diagram showing the configuration of a ventilation control system according to an embodiment of the present invention. 2 is an example of implementing the ventilation control system of FIG. 1 . 1 and 2, the ventilation control system 1000 includes a central control server 1100, a sensor unit 1200, a sub control device 1300, ventilation fans 1410 and 1420, and a main control device 1500. can include

The central control server 1100 controls the area where the ventilation control system 1000 is installed through a network such as Ethernet while performing FMS (Facility Management System), BEMS (Building Energy Management System), SI (System Integration) and integrated automatic control functions. Meteorological information including the latest fine dust concentration information is received, the information is collected, and the information is transmitted to the main control device 1500. That is, the central control server 1100 requests information disclosure data from the public data portal (DATA.GO.KR), the Korea Meteorological Administration, the Korea Environment Corporation, etc., receives weather information, and uses it for automatic building control. The central control server 1100 may or may not be provided selectively as needed.

The sensor unit 1200 measures the degree of contamination of the indoor 10 of the facility. According to an embodiment, the sensor unit 1200 may include a light emitting unit 1210, a light receiving unit 1220, a reflector 1230, and a fine dust sensor 1240.

The light emitting unit 1210 is installed in the room 10 of a facility to be ventilated. The light emitting unit 1210 emits a laser. The light receiving unit 1220 is installed in the room 10 where the light emitting unit 1210 is installed. The light receiving unit 1220 receives the laser beam emitted by the light emitting unit 1210 and measures the amount of light of the received laser beam. According to an embodiment, the light receiving unit 1220 may receive laser light reflected from a reflector 1230 to be described below.

The reflector 1230 is installed at a position spaced apart from the light emitting unit 1210 in the room 10 . The reflector 1230 reflects the laser emitted from the light emitting unit 1210 so that the light receiving unit 1220 receives light. Accordingly, the reflector 1230 may be installed at a position where the laser emitted from the light emitting unit 1210 is directed.

In this case, the light emitting unit 1210 and the light receiving unit 1220 may be provided by being fastened to one body. The body to which the light emitting unit 1210 and the light receiving unit 1220 are coupled and the reflector 1230 may be installed on walls facing each other. Alternatively, some or all of the body to which the light emitting unit 1210 and the light receiving unit 1220 are fastened and the reflector 1230 may be installed on a structure extending downward from the ceiling or a structure extending upward from a floor other than a wall.

In this case, power connected to the light emitting unit 1210 and the light receiving unit 1220 is compared to the case where the light emitting unit 1210 and the light receiving unit 1220 are spaced apart from each other and provided facing each other because the reflector 1230 to be described below is not provided. Lines for supply or communication may be provided adjacent to each other to make wiring easier.

The reflector 1230 may optionally not be provided. In this case, the light emitting unit 1210 and the light receiving unit 1220 may be spaced apart from each other and face each other so that the laser emitted by the light emitting unit 1210 may be received by the light receiving unit 1220 .

The fine dust sensor 1240 may be provided as a sensor having a structure different from that of the light emitting unit 1210, the light receiving unit 1220, and the reflector 1230. The fine dust sensor 1240 is composed of one body and can measure the concentration of fine dust at one location where the body is installed. The fine dust sensor 1240 may be provided with various types of sensors that may be provided as one body installed in one location. For example, the fine dust sensor 1240 may be provided as a light scattering measurement type fine dust sensor. In the case of the method of measuring the concentration of fine dust using the light emitting unit 1210, the light receiving unit 1220, and the reflector 1230, the path of the laser is provided long enough to cross the space to be measured, and some areas of the path Since the measurement value can be determined only by the concentration of fine dust in , there is a possibility that an error may occur for each area. In addition, as will be described below, the light emitting unit 1210, the light receiving unit 1220, and the reflector 1230 are located at a considerably high position from the location where the work is mainly performed to prevent interference with other objects such as people or mechanical devices. As a result, there is a possibility that the concentration of fine dust in the location where the work is mainly performed is measured differently. The fine dust sensor 1240 is provided to compensate for problems that may occur when the concentration of fine dust is measured using only the light emitting unit 1210, the light receiving unit 1220, and the reflector 1230.

The sub control device 1300 turns ON/OFF each of the ventilation fans 1410 and 1420 according to the control of the main control device 1500 . The sub control device 1300 may be provided individually for each of the ventilation fans 1410 and 1420 . The sub control device 1300 may transmit to the main control device 1500 whether each ventilation fan 1410 or 1420 is in operation.

The ventilation fans 1410 and 1420 introduce air into the room 10 to ventilate the room 10 and discharge air from the room 10 to the outdoors. According to one embodiment, the ventilation fans 1410 and 1420 may include an air supply fan 1410 and an exhaust fan 1420 . The air supply fan 1410 introduces air into the room 10 from the outside. The exhaust fan 1420 exhausts the air in the room 10 to the outside. Each of the air supply fan 1410 and the exhaust fan 1420 may be installed in a duct communicating with the outside. Indoor air introduced into the duct by the exhaust fan 1420 may be exhausted to the outside after contaminants are filtered by a filter (not shown).

The main control device 1500 may receive a signal for the measured value from the sensor unit 1200, and may also receive weather information from the central control server 1100 when the central control server 1100 is provided. A signal for controlling the ventilation fans 1410 and 1420 according to the received signal and weather information or the received signal is transmitted to the sub control device 1300. In the description below, the main control device 1500 may control the ventilation fans 1410 and 1420 through the sub control device 1300 by transmitting a control signal to the sub control device 1300 .

According to an embodiment, the main control device 1500 is configured when the amount of laser light received by the light receiver 1220 exceeds a certain value or the concentration of fine dust measured by the fine dust sensor 1240 exceeds a certain value (or conditions ) When the ventilation fans 1410 and 1420 are operated, and the amount of laser light received by the light receiver 1220 is less than a certain value and the fine dust concentration measured by the fine dust sensor 1240 is also less than a certain value (and conditions), the ventilation fan Stop (1410, 1420). In the case of the example using the light emitting unit 1210 and the light receiving unit 1220, when the air in the room 10 is contaminated by floating contaminants such as dust or oil mist, the amount of laser light passing through the air is increased due to the particles. It uses the phenomenon that the more the path (r) is followed, the more degraded it is. The constant value of the above-described light intensity of the laser and the constant value of the concentration of fine dust may be set by a number of simulations and/or test measurements. Therefore, the ventilation control system 1000 of the present invention operates the ventilation fans 1410 and 1420 when the pollution level of the air in the room 10 exceeds a certain level, and ventilates the ventilation fans 1410 and 1420 when it is below a certain level. ) can be stopped to prevent excessive power consumption.

According to an embodiment, the main control device 1500 may be set to operate the ventilation fans 1410 and 1420 after the condition for operating the ventilation fans 1410 and 1420 is maintained for a predetermined time. For example, the main control device 1500 may be set to operate the ventilation fans 1410 and 1420 after the conditions for operating the ventilation fans 1410 and 1420 are maintained for 30 seconds. Therefore, when a person or an object moves, the light intensity of the laser is lowered for a while due to the laser path (r) being blocked, or the fine dust concentration is temporarily increased only at a location very close to the fine dust sensor 1240 due to the movement of the worker. errors can be prevented in the case of high

In addition, the main control device 1500 may be set to operate the ventilation fans 1410 and 1420 at least for a predetermined period of time once they are operated. For example, the main control device 1500 maintains the operating state of the ventilation fans 1410 and 1420 for 30 minutes once the ventilation fans 1410 and 1420 are operated, and then the above-described ventilation fans 1410 and 1420 When the condition to stop is satisfied, the ventilation fans 1410 and 1420 are stopped. Therefore, when the conditions for operating/stopping the ventilation fans 1410 and 1420 are satisfied and dissatisfied multiple times within a short period of time, frequent repetition of ON/OFF of the ventilation fans 1410 and 1420 can be prevented. . Repeating frequent ON/OFF of the ventilation fans 1410 and 1420 within a short period of time may cause load and failure of the ventilation fans 1410 and 1420.

In contrast, the main control device 1500 operates the above-described ventilation fans 1410 and 1420 as described above by an operator's setting change through an input device such as a keyboard or a button provided directly to the main control device 1500. It can be switched between manual modes that can turn ON/OFF the ventilation fans 1410 and 1420 according to the operator's operation regardless of the conditions to be started/stopped.

In addition, when the central control server 1100 is provided, the main control device 1500 controls ventilation received from the central control server 1100 even when the above-described conditions for operating the ventilation fans 1410 and 1420 are satisfied. When the concentration of the latest fine dust in the area where the system 1000 is installed is equal to or greater than the concentration set for each amount of laser light received by the light receiver 1220, the ventilation fans 1410 and 1420 may be turned off. In this case, the main control device 1500 may turn off the ventilation fans 1410 and 1420 even if the aforementioned predetermined time has not elapsed after the ventilation fans 1410 and 1420 have been operated. Therefore, the ventilation control system 1000 according to the present embodiment can prevent outside air from being introduced into the room when it is determined that the outside air is more polluted than the indoor air.

FIG. 3 is a view showing an installation example of a light emitting unit, a light receiving unit, a reflector, and a fine sensor shown in FIG. 2 . Referring to FIG. 3 , the light emitting unit 1210, the light receiving unit 1220, and the reflector 1230 may be installed at a height (h) at which the laser path (r) is a certain height or higher from the floor of the room 10. there is. Therefore, it is possible to reduce the probability that the path r of the laser is blocked by structures such as people or mechanical devices in the room 10 .

However, if the heights of the light emitting unit 1210, the light receiving unit 1220, and the reflector 1230 are excessively high, the laser may measure the air quality different from the air quality at the height at which the worker actually works, so light emission The part 1210, the light receiving part 1220, and the reflector 1230 may be installed in a specific height range over a certain height of the laser path r. For example, the light emitting unit 1210, the light receiving unit 1220, and the reflector 1230 may be installed such that the path r of the laser is located at a height of 4 to 5 m from the floor.

In addition, the fine dust sensor 1240 may be installed at a location close to an area where a worker mainly performs work, compared to a path of a laser between the light emitting unit 1210, the light receiving unit 1220, and the reflector 1230. According to an embodiment, the fine dust sensor 1240 is located in an area where the distance to the mechanical device in which the process is performed is shorter than the height h of the laser path of the light emitting unit 1210, the light receiving unit 1220, and the reflector 1230. can be installed In addition, however, in order to avoid errors due to the high fine dust concentration that is temporarily generated during the movement of the operator or the operation of the mechanical device, the fine dust sensor 1240 is located at a height above a certain height from the floor, and the height of the worker's respiratory system Since it is undesirable to deviate from a position that is too high, the fine dust sensor 1240 is preferably located at a height equal to or less than another specific height from the floor. Therefore, according to an embodiment, the fine dust sensor 1240 may be installed at a height in the range of 2 m to 2.5 m from the floor surface at a height h1 of the measurement unit for directly measuring the concentration of fine dust.

FIG. 4 is a plan view illustrating an example in which the light emitting unit, the light receiving unit, the reflector, the fine dust sensor, and the ventilation fan of FIG. 2 are installed in a room partitioned into a plurality of spaces. In FIG. 4, configurations such as ducts and electrical/communication wiring connecting the respective ventilation fans 1410 and 1420 are omitted for convenience of illustration.

Referring to FIG. 4 , a room 10 ventilated by the ventilation control system 1000 may be partitioned into a plurality of spaces 11 . Each space 11 may be physically partitioned by a wall. Unlike this, a configuration that physically divides the space, such as a wall, may not be provided between the respective spaces 11 . According to an embodiment, a plurality of the light emitting unit 1210, the light receiving unit 1220, the reflector 1230, the fine dust sensor 1240, and the ventilation fans 1410 and 1420 may be provided. The light emitting unit 1210 , the light receiving unit 1220 , the reflector 1230 , the fine dust sensor 1240 , and the ventilation fans 1410 and 1420 may be respectively provided in each space 11 . One or both of the supply fan 1410 and the exhaust fan 1420 may be selectively provided in one space 11 as needed.

The main control device 1500 independently controls the ventilation fans 1410 and 1420 for each space 11 according to the amount of laser light received by the light receiver 1220 and the concentration of fine dust measured by the fine dust sensor 1240. can do. A method of controlling each of the ventilation fans 1410 and 1420 by the main control device 1500 may be the same as or similar to that described above. According to an embodiment, when the room 10 to be ventilated by the ventilation control system 1000 is the interior of a factory where mechanical devices used in various manufacturing processes are provided, each space is an area where each mechanical device is provided. can be subdivided. According to this embodiment, the ventilation control system 1000 can more precisely manage the air quality of the room 10 having a large area for each area.

5 is a block diagram showing an example of the main control device of FIG. 1 . Referring to FIG. 5 , the main control device 1500 may include a communication unit 1510, a storage unit 1520, a display unit 1530, and a control unit 1540.

The communication unit 1510 may communicate with the light emitting unit 1210 , the light receiving unit 1220 , the fine dust sensor 1240 , and the ventilation fans 1410 and 1420 . The communication unit 1510 is CDMA (code division multiple access), GSM (global system for mobile communication), WCDMA (wideband CDMA), CDMA-2000, TDMA (time division multiple access), LTE (long term evolution), Wimax (worldwide) It can support wired and wireless communication such as interoperability for microwave access (WLAN), wireless LAN (WLAN), ultrawide band (UWB), Bluetooth, wireless display (WI-DI), Internet, LAN, RS-485, Modbus, and Ethernet. .

The communication unit 1510 may include an input unit 1511 and an output unit 1512.

The input unit 1511 provides real-time information on whether each air supply fan 1410 and each exhaust fan 1420 are operating, the amount of light measured by each light receiving unit 1220, and the fine dust measured by the fine dust sensor 1240. Real-time information on dust concentration and, when the central control server 1100 is provided, selectively receive fine dust information from the central control server 1100 and transmit it to the storage unit 1520 or the control unit 1540.

The output unit 1512 transmits a laser firing signal to the light emitting unit 1210 under the control of the controller 1540 and turns ON/OFF the sub control unit 1300 connected to the supply fan 1410 and the exhaust fan 1420. OFF signal can be delivered. In addition, the output unit 1512 displays the data stored in the storage unit 1520 on the display unit 1530 under the control of the control unit 1540, whether or not the ventilation fans 1410 and 1420 are turned on/off in real time and their activation status. can deliver.

The storage unit 1520 determines whether the ventilation fans 1410 and 1420 are operated in real time, which is input through the input unit 1511, the real-time light amount data measured by each light receiving unit 1220, and the fine dust sensor 1240. It stores measured real-time fine dust concentration data, and may include an operating time DB 1521, a light quantity DB 1522, and a measured concentration DB 1523. Operation times for each air supply fan 1410 and each exhaust fan 1420 for each time period are stored in the operation time DB 1521 . The light amount DB 1522 stores real-time light amount data of the laser measured by each light receiving unit 1220 . In the measured concentration DB 1523 , real-time fine dust concentration data measured by each fine dust sensor 1240 is stored.

The display unit 1530 may output data stored in the storage unit 1520 and real-time data received from the output unit 1512 under the control of the controller 1540 . According to an embodiment, the display unit 1530 may be provided as an electronic display device such as a CRT monitor or an LCD monitor.

The controller 1540 may include a processor 1541, an operating time management unit 1542, a light quantity management unit 1543, a ventilation fan management unit 1544, a display management unit 1545, and a measured concentration management unit 1546. can The controller 1540 may be implemented in hardware or software. For example, the processor 1541 is implemented in hardware, and includes an operating time management unit 1542, a light quantity management unit 1543, a ventilation fan management unit 1544, a display management unit 1545, and a measured concentration management unit 1546. ) can be implemented as an algorithm or software.

The processor 1541 may control overall operations of the main control device 1500 . For example, the processor 1541 accesses the operation time DB 1521, the light amount DB 1522, and the measured concentration DB 1522 of the storage unit 1520, and the operation time management unit 1542, the light amount The control unit 1540 can be driven by executing algorithms or program commands constituting the management unit 1543, the ventilation fan management unit 1544, the display management unit 1545, and the measured concentration management unit 1546. Also, the processor 1541 may include controllers, interfaces, graphic engines, and the like that control various elements of the main control device 1500 . The processor 1541 may be provided in the form of a system-on-chip (SoC), an application specific integrated circuit (ASIC), or a field programmable gate array (FPGA).

The operating time management unit 1542 may access the operating time DB 1521 of the storage unit 1520 and manage operating time information for each ventilation fan 1410 or 1420 . According to one embodiment, the operation time management unit 1542 is the ventilation fan management unit 1544 described below with respect to the ventilation fans 1410 and 1420 via the communication unit 1510, the timing and stop when the operation signal is generated The time between when the signal is generated may be stored in the operating time DB 1521 in real time as operating time information for each ventilation fan 1410 or 1420 .

The light quantity management unit 1543 may store light quantity information for each light receiver 1220 in the light quantity DB 1522 in real time when the light quantity measured by each light receiver 1220 is input through the input unit 1511. there is.

The ventilation fan management unit 1544 operates or stops the corresponding ventilation fans 1410 and 1420 according to the amount of light measured by each light receiving unit 1220 and the concentration of fine dust measured by each fine dust sensor 1240. The communication unit 1510 may be controlled to transmit a signal to each sub control device 1300 . According to one embodiment, the ventilation fan management unit 1544, as described above, in addition to the amount of light measured by each light receiving unit 1220 and the concentration of fine dust measured by each fine dust sensor 1240, the ventilation fan ( 1410 and 1420), and the amount of light measured by each light receiver 1220 and the fine dust concentration measured by each fine dust sensor 1240 maintain the operating conditions of the ventilation fans 1410 and 1420 The communication unit 1510 may be controlled to transfer a signal for operating or stopping the ventilation fans 1410 and 1420 to the ventilation fans 1410 and 1420 according to a minimum time condition.

The display management unit 1545 stores the data stored in the operation time DB 1521, the amount of light DB 1522, and the measured concentration DB 1522, and the respective ventilation fans 1410 and 1420 at the request of the operator through the input device. The display unit 1530 may be controlled to output real-time ON/OFF status and activation status of ).

When the measured concentration management unit 1546 receives the real-time fine dust concentration measured by each fine dust sensor 1240 through the input unit 1511, each fine dust sensor 1240 is stored in the measured concentration DB 1523. ), the measured fine dust concentration information can be stored in real time.

6 is a view showing an example of outputting the amount of light measured by each light receiving unit to a display unit. Referring to FIG. 6 , the display management unit 1545 may output the amount of light measured by each light receiving unit 1220 through the display unit 1530 on a time-by-time basis according to a worker's request through an input device.

For example, the user may select the start and end points of the time to check the measured light quantity through the interface i1 output on the upper left of the screen of the display unit 1530 . When such time setting is completed, the display management unit 1545 outputs the amount of light measured by each light receiving unit 1220 at each predetermined time interval during the time set at the lower left (i2) of the screen of the display unit 1530, and , It is possible to control to output a graph showing a change in the amount of light measured in each light receiving unit 1220 for a time set on the right side (i3) of the screen.

The display management unit 1545 may output the fine dust concentration measured by each fine dust sensor 1240 through the display unit 1530 on a time-by-time basis according to a worker's request through an input device.

For example, the user may select the start and end points of the time to check the fine dust concentration measured through the interface output on the screen of the display unit 1530. When such time setting is completed, the display management unit 1545 outputs the fine dust concentration measured by each fine dust sensor 1240 for each predetermined time interval during the set time on the screen of the display unit 1530, and displays the fine dust concentration on the screen. It can be controlled to output a graph showing changes in the concentration of fine dust measured by each fine dust sensor 1240 for a time set in .

7 is a view showing an example in which operating times of each ventilation fan are output to a display unit. Referring to FIG. 7 , the display management unit 1545 determines the operation time of each ventilation fan 1410 and 1420 for each specific time unit according to the operator's request through the input device, the maximum value of the operation time for each unit time, The minimum value, the average value, and other operating states of the ventilation fans 1410 and 1420 may be output through the display unit 1530 .

The manager of the facility where the ventilation control system 1000 is installed can grasp the degree of contamination and time of contamination for each space in the room 10 through the output data as shown in FIGS. The data described above can be primarily utilized to improve the arrangement, arrangement of each component of the ventilation control system 1000, and the like.

As described above, the ventilation control system 1000 according to an embodiment of the present invention measures the air quality using the amount of laser light between the light emitting unit 1210 and the light receiving unit 1220 and a separate fine dust sensor 1240 Since the ventilation fan can be started or stopped according to air quality, electricity used for operation of the ventilation fan can be saved.

The foregoing are specific examples for carrying out the present invention. In addition to the above-described embodiments, the present invention will also include embodiments that can be simply or easily changed in design. In addition, the present invention will also include techniques that can be easily modified and practiced using the embodiments. Therefore, the scope of the present invention should not be limited to the above-described embodiments and should not be defined, and should be defined by those equivalent to the claims of this invention as well as the claims to be described later.

1000: ventilation control system 1100: central control server
1200: sensor unit 1210: light emitting unit
1220: light receiving unit 1230: reflector
1300: sub control unit 1410: air supply fan
1420: Exhaust fan 1500: Main control unit

Claims (4)

A light emitting unit installed in the target room and emitting a laser;
a light receiving unit for receiving the laser light;
a body to which the light emitting part and the light receiving part are fastened;
a reflector installed at a position spaced apart from the light receiving unit and the light emitting unit, facing the body and being spaced apart from each other, and reflecting the laser beam;
a ventilation fan that ventilates the target room;
a fine dust sensor installed at one location in the target room and measuring the concentration of fine dust at the one location; and
When the amount of laser light received by the light receiver exceeds a certain value or the concentration of fine dust measured by the fine dust sensor exceeds a certain value, the ventilation fan is operated, and the amount of laser light received by the light receiver is equal to or less than the certain value. and a main control device for stopping the ventilation fan when the fine dust concentration measured by the fine dust sensor is less than or equal to the specific value,
The main control device is configured to perform the ventilation fan after a state in which the amount of laser light received by the light receiving unit exceeds the predetermined value or the concentration of fine dust measured by the fine dust sensor exceeds the specific value is maintained for a first predetermined time or longer. Operate at least for a second predetermined time or longer,
The second predetermined time is greater than the first predetermined time,
The main control device is configured to turn off the ventilation fan even if the operation time of the ventilation fan is less than the second predetermined time when the concentration of fine dust in the area received is greater than or equal to the set concentration of the amount of light of the laser received by the light receiving unit. ,
The main control device further includes an input device,
The main control device is configured to be able to switch to a manual mode capable of operating or stopping the ventilation fan according to manipulation of the input device,
The laser reflected by the reflector is received by the light receiving unit,
The ventilation fan is:
an air supply fan introducing air into the target room from the outside through an air supply duct; and
an exhaust fan configured to discharge indoor air to the outside through an exhaust duct, wherein the exhaust duct includes a filter to filter pollutants from the indoor air and then exhaust them to the outside;
The fine dust sensor is installed so that the height of the measurement unit of the fine dust sensor is located at a height in the range of 2 meters to 2.5 meters from the floor of the target room,
The fine dust sensor is a fine dust sensor of a light scattering measurement method.
The target interior is divided into a plurality of spaces,
The light emitting unit, the light receiving unit, the fine dust sensor, and the ventilation fan are provided in plurality to correspond to the space, respectively,
The main control device controls the ventilation fan independently for each space according to the amount of light received by the light receiving unit and the concentration of fine dust measured by the fine dust sensor,
The main control unit is:
An operating time management unit that manages operating time information for each of the air supply fan and the exhaust fan, the operating time management unit determines the time between when an operation signal is generated and when a stop signal is generated for the ventilation fan. configured to store in real time as uptime information;
a light quantity management unit receiving the measured light quantity information for each of the light receiving units and storing the light quantity information in real time;
a ventilation fan management unit controlling a signal for operating or stopping the ventilation fan according to the amount of light measured by the light receiver and the concentration of fine dust measured by each of the fine dust sensors; and
A ventilation control system comprising a measured concentration management unit receiving the fine dust concentration measured by the fine dust sensor in real time and storing the fine dust concentration information in real time.
According to claim 1,
The ventilation control system of claim 1 , wherein the light emitting part, the light receiving part, and the reflecting plate are installed such that the path of the laser is positioned at a height of 4 m to 5 m from the floor of the target room. delete According to claim 1,
The main control device,
a storage unit for storing data of the operation time information of the ventilation fan, the amount of light, and the concentration of fine dust measured by the fine dust sensor according to time; and
Ventilation control system including a display unit for outputting the data stored in the storage unit.

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