KR20140022159A - Natural ventilation notice system of a structure and natural ventilation notice/control method - Google Patents

Abstract

The present invention relates to a natural ventilation notification system for buildings and a natural ventilation notice/control method and more specifically, to a natural ventilation notification system for buildings and a natural ventilation notice/control method to appropriately notify occupants of the time for natural ventilation by analyzing indoor and outdoor environmental conditions and grasping changes in the environmental conditions; and to optimally run cooling and heating operations by linking the natural ventilation notification system for buildings with the environmental conditions. [Reference numerals] (100) Outdoor environment detecting unit; (110) Outdoor temperature detecting sensor; (120) Outdoor wind speed detecting sensor; (130) Transmission unit; (200) Indoor environment detecting unit; (210) Indoor temperature detecting sensor; (220) Indoor pollution detecting sensor; (230) Receiving unit; (300) Ventilation determining unit; (400) Window driving unit; (500) Control unit; (600) Notifying unit; (AA) Windows and doors

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a natural ventilation notification system and a natural ventilation notification /

The present invention relates to a natural ventilation notification system and a natural ventilation notification / control method of a building, and more particularly, to an indoor ventilation notification / control method of a building, more specifically, And to a natural ventilation notification system and a natural ventilation notification / control method of a building that can operate the air conditioning system in an optimum manner when necessary.

In general, ventilation is divided into natural ventilation and artificial ventilation.

The natural ventilation is performed when the temperature difference between the indoor and the outdoor is equal to or higher than a predetermined value. The ventilation amount depends on the temperature difference between the indoor and the outdoor, the wall gap, the size of the window or the entrance. Artificial ventilation is a method to clean indoor air by artificially sending polluted air out of the room.

The related art related to the ventilation of such a building will be described below.

Korean Patent Laid-Open Publication No. 10-2006-0091437 proposes an air conditioning system and a control method thereof for judging a temperature difference to reduce pollution degree of indoor air, and a control method thereof. Korean Patent Laid-Open Publication No. 10-2011-0102729 The present invention proposes a hybrid ventilation system and method that can prevent energy loss due to continuous operation of a waste heat ventilation system through interlocking with a natural ventilation system.

However, since the above-mentioned patents do not consider complex ambient conditions and simply ventilate based on the temperature difference and do not judge complex factors of the indoor and outdoor environment, it is difficult to achieve optimal ventilation conditions .

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above-mentioned problems occurring in the prior art, and it is an object of the present invention to provide a system and a method for realizing natural ventilation in a building by grasping complex environmental factors including indoor / outdoor temperature difference and outdoor wind speed, And to provide a natural ventilation notification system and a natural ventilation notification / control method of a building that can inform the user of the natural ventilation.

In addition, the present invention can control the natural ventilation by classifying the maximum ventilation, the appropriate ventilation, the minimum ventilation according to the complex environmental conditions inside and outside of the building, and in addition to this in accordance with the complex environmental conditions, the heating and cooling control Another object is to provide a natural ventilation notification system and natural ventilation notification / control method of the building that can achieve the optimal comfortable indoor environment by enabling.

The solution of the present invention is not limited to those mentioned above, and other solutions not mentioned can be clearly understood by those skilled in the art from the following description.

According to a first aspect of the present invention, there is provided an outdoor unit including: an outdoor environment detecting unit for detecting an outdoor wind speed and an outdoor temperature; An indoor environment detecting unit for detecting indoor temperature and indoor pollution degree; A ventilation determination unit for receiving data detected by the outdoor environment detection unit and the indoor environment detection unit and determining whether ventilation is to be performed; A window drive unit for operating opening and closing windows of a building; A control unit for controlling the window driving unit to adjust opening and closing of the window according to the command of the ventilation determining unit; And a notifying unit informing the ventilation need information when the ventilation determining unit determines that ventilation is necessary.

In the first aspect of the present invention, the outdoor environment detecting unit includes an outdoor temperature detecting sensor, an air speed detecting sensor for detecting an outdoor wind speed, and a transmitting unit for receiving respective data detected by the outdoor temperature detecting sensor and the wind speed detecting sensor And the indoor environment detecting unit may include a room temperature detecting sensor, a contamination degree detecting sensor for detecting the degree of pollution in the room, and a receiving unit for receiving data from the room temperature detecting sensor and the transmitting unit.

In the first aspect of the present invention, the ventilation determination unit compares data from the outdoor environment detection unit and the indoor environment detection unit with a predetermined reference temperature, wind speed, and indoor pollution degree to determine whether or not to ventilate, And the control unit controls the window driving unit to receive a command according to the determination result of the ventilation determination unit to control the opening and closing degree of the window.

According to a second aspect of the present invention, there is provided a natural ventilation notification / control method for a building, the method comprising: sensing outdoor wind speed, indoor / outdoor temperature, indoor indoor air pollution, Compare the reference data; If it is determined that the detection data is larger than the first reference data as a result of the comparison between the detection data and the first reference data, the preset maximum ventilation is executed; Comparing the detected data with second reference data smaller than the first reference data when it is determined that the detected data is not larger than the first reference data; If it is determined that the detection data is larger than the second reference data as a result of the comparison between the detection data and the second reference data, the preset appropriate ventilation is executed; Comparing the detected data with third reference data smaller than the second reference data when it is determined that the detected data is not larger than the second reference data as a result of comparison between the detected data and the second reference data; When it is determined that the detection data is larger than the third reference data as a result of the comparison between the detection data and the third reference data, a natural ventilation notification / control method of a building that performs a preset minimum ventilation is provided.

In a second aspect of the present invention, the method may further include informing the occupants of the ventilation necessary information about the ventilation before or at the same time as the maximum ventilation, the proper ventilation, and the minimum ventilation.

According to a third aspect of the present invention, there is provided a natural ventilation notification / control method for a building, comprising: determining whether an outdoor wind speed is equal to or less than a preset first reference wind speed; Determining whether the outdoor temperature is within a predetermined first reference temperature range when the outdoor wind speed is equal to or lower than a preset first reference wind speed; If it is determined that the outdoor temperature is within the first reference temperature range, determining that the outdoor temperature is within a second reference temperature range included in a first predetermined reference temperature range; When it is determined that the outdoor temperature is within the second reference temperature range, the present invention provides a natural ventilation notification / control method of a building that executes a preset maximum ventilation.

Determining whether the outdoor wind speed is lower than a second reference wind speed that is higher than the first reference wind speed in the case where it is determined that the outdoor wind speed is not lower than the preset first reference wind speed; If it is determined that the outdoor wind speed is equal to or less than the second reference wind speed, preset appropriate ventilation is executed; If it is determined that the outdoor temperature is not within the second reference temperature range, the predetermined proper ventilation can be executed.

According to the third aspect of the present invention, it is determined whether or not the indoor temperature is equal to or higher than a predetermined indoor reference temperature when it is determined that the outdoor temperature is not within the first reference temperature range; If it is determined that the room temperature is not above the room reference temperature, the preset minimum ventilation can be performed.

In addition, in the third aspect of the present invention, when it is determined that the room temperature is equal to or greater than the preset room reference temperature, the cooling signal may be commanded to perform the cooling and the minimum ventilation at the same time.

In the third aspect of the present invention, in the step of performing the maximum ventilation, it is determined whether the average temperature of the minimum and maximum temperatures of the respective rooms of the building is within a preset indoor average temperature range; If it is determined that the indoor temperature is within the indoor average temperature range, whether or not a signal is generated for ventilation required information; If it is determined that the average temperature of each room is not within the preset indoor average temperature range, it is determined whether the maximum indoor temperature is increased, and if it is determined to increase, the cooling signal may be commanded to perform minimum ventilation at the same time as cooling.

In the third aspect of the present invention, it is determined whether the indoor minimum temperature is increased if it is determined that the indoor maximum temperature does not increase; When it is determined that the indoor minimum temperature is increased, the heating signal is commanded to perform minimum ventilation at the same time as the heating, and when it is determined that the indoor minimum temperature is not increased, the minimum ventilation may be executed.

In the third aspect of the present invention, the ventilation necessary information for the maximum ventilation, the proper ventilation, and the minimum ventilation may further include differently notifying the visual signal or the audio signal for each ventilation.

The natural ventilation notification system and the natural ventilation notification / control method of a building according to the present invention have the following effects.

First, the present invention grasps complex environmental factors including indoor and outdoor temperature difference and outdoor wind speed conditions when natural ventilation is possible in a building, and informs the occupant of a reasonable natural ventilation time so that the ventilation can be manually or automatically performed at an optimum point There is an effect that can be made.

Second, the present invention can be controlled by separating the maximum ventilation, the appropriate ventilation, the minimum ventilation according to the complex environmental conditions inside and outside of the building, and in addition, it is possible to control the heating and cooling by interlocking with these complex environmental conditions. Therefore, there is an effect that can achieve an optimal comfortable indoor environment.

Third, the present invention can be applied not only to a central control type building but also to an individual control type system.

Fourth, the present invention can be effectively applied to buildings partitioned into small residential spaces such as houses, dormitories, hotels, and the like, and can be applied to an automatic control system in a building that is difficult to ventilate naturally, such as a high-rise building.

The effects of the present invention are not limited to those mentioned above, and other solutions not mentioned may be clearly understood by those skilled in the art from the following description.

1 is a block diagram schematically showing the overall configuration of a natural ventilation notification system of a building according to the present invention.
2 is an exemplary perspective view illustrating an example in which the structure of a natural ventilation notification system of a building according to the present invention is applied to a building.
3 is a block diagram schematically illustrating an example of a transmitting module and a receiving module constituting a natural ventilation notification system of a building according to the present invention.
4 is a block diagram schematically showing another example of a transmitting module and a receiving module constituting a natural ventilation notification system of a building according to the present invention.
5 is a flowchart showing an example of a natural ventilation notification / control method of a building according to the present invention.
6 is a flow chart showing another example of a natural ventilation notification / control method of a building according to the present invention.

Further objects, features and advantages of the present invention will become more apparent from the following detailed description and the accompanying drawings.

Before describing the present invention in detail, it is to be understood that the present invention is capable of various modifications and various embodiments, and the examples described below and illustrated in the drawings are intended to limit the invention to specific embodiments It is to be understood that the invention includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

When a component is referred to as being "connected" or "connected" to another component, it may be directly connected to or connected to that other component, but it may be understood that other components may be present in between. Should be. On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this specification, the terms "comprises" or "having" and the like refer to the presence of stated features, integers, steps, operations, elements, components, or combinations thereof, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Also, the terms " part, "" unit," " module, "and the like, which are described in the specification, refer to a unit for processing at least one function or operation, Software. ≪ / RTI >

In the following description of the present invention with reference to the accompanying drawings, the same components are denoted by the same reference numerals regardless of the reference numerals, and redundant explanations thereof will be omitted. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

First, a natural ventilation notification system of a building according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a block diagram schematically showing the overall configuration of a natural ventilation notification system of a building according to the present invention. FIG. 2 is a schematic view showing an example of a natural ventilation notification system of a building according to the present invention, Fig. FIG. 3 is a schematic view showing an example of a transmitting module and a receiving module constituting a natural ventilation notification system of a building according to the present invention. FIG. 4 is a view showing a transmission Fig. 8 is a schematic diagram showing another example of a module and a receiving module. Fig.

First, as shown in FIG. 1, a natural ventilation notification system of a building according to the present invention includes an outdoor environment detection unit 100 including a unit for detecting an outdoor wind speed and an outdoor temperature; An indoor environment detecting unit (200) including a unit for detecting indoor pollution degree and indoor temperature; A ventilation determination unit 300 for receiving data detected by the outdoor environment detection unit 100 and the indoor environment detection unit 200 and determining whether ventilation is to be performed; A window drive unit 400 for operating opening and closing windows of a building; A control unit (500) for controlling the window driving unit (400) to control opening and closing of the window according to an instruction of the ventilation determining unit (300); And a notification unit 600 for informing the ventilation need information when the ventilation determination unit 300 determines that ventilation is necessary.

The outdoor environment detection unit 100 includes an outdoor temperature detection sensor 110 for detecting an outdoor temperature, a wind speed detection sensor 120 for detecting an outdoor wind speed, an outdoor temperature detection sensor 110 and a wind speed detection sensor 120 And a transmitting unit 130 for receiving each data detected by the receiving unit and transmitting the received data to a receiving unit to be described later.

The indoor environment detecting unit 200 includes a room temperature detecting sensor 210 for detecting the temperature of the room, a contamination degree detecting sensor 220 for detecting the degree of contamination of the room, 230 for receiving data from the mobile station.

The pollution degree detecting sensor 220 may be a carbon dioxide detecting sensor for detecting the concentration of the indoor gas, for example, the concentration of carbon dioxide (CO ₂ ) in the room.

The ventilation determination unit 300 compares the data provided from the outdoor environment detection unit 100 and the indoor environment detection unit 200 with a preset reference temperature, wind speed, and indoor pollution degree to determine whether or not to ventilate, 500 and the notification unit 600 of FIG.

The window driving unit 400 may have any structure as long as it is a mechanical mechanism capable of opening and closing a window. For example, the window drive unit 500 includes a drive motor that can be rotated in the forward and reverse directions, a gear train (gear box) that receives the drive force of the drive motor, and an interlock gear that receives the drive force of the gear train and is coupled to the window .

The control unit 500 controls the window driving unit 400 to control the opening and closing of the window and the degree of opening and closing of the window by receiving a command according to the determination result of the ventilation determination unit 300.

The notification unit 600 may be a speaker or a combination of a speaker or a speaker that emits a light or a sound to inform the occupant when it is determined that the ventilation is necessary according to the determination result of the ventilation determination unit 300.

In the present invention, the transmission unit 130 and the reception unit 230 may be transmitted and received in a wireless communication (near) as shown in FIG. 3, or may be transmitted in a wired connection as shown in FIG.

In addition, the outdoor environment detecting unit 100 including the outdoor temperature detecting sensor 110, the outdoor wind speed detecting sensor 120, and the transmitting unit 130 may be configured as a single module. Similarly, the present invention includes an indoor environment detecting unit 200, a ventilation determining unit 300, a control unit 500, and an alarm unit 500 including an indoor temperature detection sensor 210, a pollution degree detection sensor 220, (600) may be composed of one module.

The natural ventilation notification system of a building according to the present invention configured as described above can detect complex environmental factors including indoor / outdoor temperature difference, outdoor wind speed, indoor pollution condition, and the like, so that when natural ventilation is possible, It can be informed and ventilated.

Next, a natural ventilation control method of a building according to the present invention will be described with reference to FIG.

5 is a flowchart showing an example of a natural ventilation notification / control method of a building according to the present invention.

As shown in FIG. 5, an example of a natural ventilation notification / control method of a building according to the present invention is a natural ventilation notification / method of a building, wherein the indoor wind speed, indoor / outdoor temperature, And the first reference data for the outdoor wind speed, the indoor / outdoor temperature, and the indoor pollution degree are compared (S100). As a result of the comparison in S100, it is determined whether the detection data is larger than the first reference data (S200), and when it is determined that the detection data is larger than the first reference data, a preset maximum ventilation is executed (S130). At this time, before or during the execution of the maximum ventilation may include a step of informing the occupants necessary information about the maximum ventilation through visual or audio means.

If it is determined in step S110 that the detected data is not larger than the first reference data, the detected data is compared with second reference data that is smaller than the first reference data (S140). When it is determined that the detection data is larger than the second reference data as a result of the comparison in step S140, preset appropriate ventilation is executed (S150). At this time, it may include a step that can inform the occupants necessary ventilation for the proper ventilation through visual or audio means before or at the same time performing the proper ventilation.

Next, if it is determined in step S150 that the detected data is not larger than the second reference data, the detected data is compared with third reference data that is smaller than the second reference data (S170). As a result of the comparison in S170, when it is determined that the detection data is larger than the third reference data (S180), a preset minimum ventilation is executed (S190). At this time, before or at the same time performing the minimum ventilation may include a step of informing the occupants necessary information on the minimum ventilation through visual or audio means.

As described above, informing the occupants of the necessary ventilation information about the maximum ventilation, the proper ventilation, and the minimum ventilation, it is possible for the occupants to easily provide the ventilation necessary information on the ventilation by changing the visual or audio signal for each ventilation. It can be recognized.

The natural ventilation notification / control method according to one embodiment of the present invention is a method of notifying / controlling based on outdoor wind speed, indoor, temperature and indoor pollution condition.

Next, another example of a natural ventilation notification / control method of a building according to the present invention will be described with reference to FIG. 6 is a flow chart showing another example of a natural ventilation notification / control method of a building according to the present invention.

The natural ventilation notification / control method according to another example differs from the environmental ventilation factor or condition in the embodiment described above. In other words, the embodiment described above is notified / controlled based on the data of outdoor wind speed, indoor / outdoor temperature and indoor pollution degree, Controlled.

As shown in FIG. 6, according to another embodiment of the natural ventilation notification / control method of a building according to the present invention, the outdoor wind speed Vo is set to a first reference wind speed (for example, 4 m / s or less) (S200). If the outdoor wind speed is less than or equal to the first predetermined reference wind speed at S200, it is determined whether the outdoor temperature To is within a preset first reference temperature (eg, 15 ° C. to 25 ° C.) (S210), and the first at S210. When it is determined that it is within the reference temperature range, it is determined whether the outdoor temperature To is within a preset second reference temperature (for example, 20 ° C. to 25 ° C.) (S220), and is within the second reference temperature range. If determined, the preset maximum ventilation is executed (S230).

On the other hand, if it is determined in step S200 that the outdoor wind speed is not less than or equal to the preset first reference wind speed, it is determined whether the outdoor wind speed Vo is less than or equal to a second reference wind speed (eg, 6 m / s) larger than the first reference wind speed. In operation S310, when it is determined that the outdoor wind speed is equal to or less than the second reference wind speed, a predetermined proper ventilation is performed (S320).

Next, when it is determined in step S210 that the outdoor temperature is not within the first reference temperature range, it is determined whether the indoor temperature Ti is greater than or equal to a preset indoor reference temperature (S240), and the indoor temperature is the indoor reference temperature. If it is determined that it is not abnormal, the predetermined minimum ventilation is executed (S250).

In addition, when it is determined in step S240 that the room temperature Ti is equal to or greater than the preset room reference temperature, the cooling signal is commanded to perform the cooling and the minimum ventilation at the same time (S250).

In addition, if it is determined in step S220 that the outdoor temperature is not within the second reference temperature range, the process proceeds to the step of performing a predetermined proper ventilation (S320).

On the other hand, in the step of performing the maximum ventilation (S230), the present invention is the average temperature of the minimum temperature (Min (Ti)) and the maximum temperature (Max (Ti)) of each room (room 1, room, ...) Determines whether the temperature is within a preset indoor average temperature range (for example, 20 ° C. to 26 ° C.) (S260), and if it is determined to be within the indoor average temperature range, determines whether a signal for ventilation necessary information is generated. If the signal does not occur (S270), it ends.

If it is determined in step S260 that the average temperature of each room is not within the preset indoor average temperature range, it is determined whether the maximum indoor temperature is increased (S280). Minimal ventilation is performed (S250). On the other hand, if it is determined that the indoor maximum temperature does not increase, it is determined whether the indoor minimum temperature is increased (S290), and if it is determined that the indoor minimum temperature is increased, the heating signal is commanded to perform the minimum ventilation at the same time as the heating ( S260), if it is determined that the indoor minimum temperature has not increased, only the minimum ventilation is executed (S260).

Here, the necessary ventilation information for the maximum ventilation, the proper ventilation, and the minimum ventilation includes a step in which the occupants can easily recognize the necessary ventilation information for the ventilation by changing the visual or audio signal for each ventilation. can do.

As a variation of the natural ventilation notification / control method according to the other embodiment, only the outdoor wind speed and the outdoor temperature can be controlled by applying them as environmental conditions for natural ventilation.

As described above, according to the natural ventilation notification / control system and control method of a building according to the present invention, when a natural ventilation is possible in a building, a complex ventilation system including indoor and outdoor temperature and outdoor wind speed, By knowing the surrounding environmental factors, it is possible to passively or automatically ventilate at the optimum time point by informing the residents of a reasonable natural ventilation time.

In addition, the present invention can be divided into the maximum ventilation, the appropriate ventilation, the minimum ventilation according to the complex environmental conditions inside and outside of the building, and in addition, it is possible to control the heating and cooling in conjunction with this complex environmental conditions. It is possible to achieve the optimal comfortable indoor environment.

In addition, the present invention can be applied not only to a central control type building but also to an individual control type system. In particular, the present invention can be effectively applied to a building divided into small residential spaces such as a house, a dormitory, a hotel, It can be applied to an automatic control system in a difficult building.

The embodiments and the accompanying drawings described in the present specification are merely illustrative of some of the technical ideas included in the present invention. Accordingly, the embodiments disclosed herein are for the purpose of describing rather than limiting the technical spirit of the present invention, and it is apparent that the scope of the technical idea of the present invention is not limited by these embodiments. Modifications and specific embodiments that can be easily inferred by those skilled in the art within the scope of the technical idea included in the specification and drawings of the present invention should be construed as being included in the scope of the present invention.

100: outdoor environment detector
110: Outdoor temperature detection sensor
120: Outdoor wind speed sensor
130: transmitting unit
200: indoor environment detecting unit
210: indoor temperature detection sensor
220: indoor pollution degree detection sensor
230: Receiving unit
300: ventilation judgment unit
400: window drive unit
500:
600: Ali Boo

Claims (7)

In a natural ventilation notification / control method of a building,
Determining whether the outdoor wind speed is equal to or lower than a predetermined first reference wind speed;
Determining whether the outdoor temperature is within a predetermined first reference temperature range when the outdoor wind speed is equal to or lower than a preset first reference wind speed;
If it is determined that the outdoor temperature is within the first reference temperature range, determining that the outdoor temperature is within a second reference temperature range included in a first predetermined reference temperature range;
If it is determined that the outdoor temperature is within the second reference temperature range, the preset maximum ventilation is performed.
Natural ventilation notification / control method of buildings.
The method of claim 1,
Determining whether the outdoor wind speed is equal to or lower than a second reference wind speed that is larger than the first reference wind speed, when it is determined that the outdoor wind speed is not lower than the preset first reference wind speed;
If it is determined that the outdoor wind speed is equal to or less than the second reference wind speed, preset appropriate ventilation is executed;
If it is determined that the outdoor temperature is not within the second reference temperature range, the preset proper ventilation is performed.
Natural ventilation notification / control method of buildings.
3. The method according to claim 1 or 2,
If it is determined that the outdoor temperature is not within the first reference temperature range, determining whether the indoor temperature is equal to or higher than a predetermined indoor reference temperature;
If it is determined that the room temperature is not above the room reference temperature, the preset minimum ventilation is performed.
Natural ventilation notification / control method of buildings.
The method of claim 3,
If it is determined that the room temperature is higher than or equal to the preset room reference temperature, the cooling signal is commanded to perform minimum ventilation at the same time as cooling.
Natural ventilation notification / control method of buildings.
The method of claim 1,
In the step of performing the maximum ventilation, it is determined whether the average temperature of the minimum and maximum temperatures of the respective rooms of the building is within a preset indoor average temperature range;
If it is determined that the indoor temperature is within the indoor average temperature range, whether or not a signal is generated for ventilation required information;
If it is determined that the average temperature of each room is not within the preset indoor average temperature range, it is determined whether the maximum indoor temperature is increased, and if it is determined that the average temperature is increased, the cooling signal is commanded to perform the minimum ventilation at the same time as cooling.
Natural ventilation notification / control method of buildings.
The method of claim 5,
Determining whether the indoor minimum temperature is increased if it is determined that the indoor maximum temperature does not increase;
When it is determined that the indoor minimum temperature is increased, the heating signal is commanded to perform the minimum ventilation at the same time as the heating, and when it is determined that the indoor minimum temperature is not increased, the minimum ventilation is performed.
Natural ventilation notification / control method of buildings.
The method according to claim 6,
Ventilation necessary information for the maximum ventilation, the proper ventilation, and the minimum ventilation further includes different notifications of visual or audio signals for each ventilation.
Natural ventilation notification / control method of buildings.

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