KR102464040B1 - control method for a ventilation system - Google Patents

Abstract

An objective of the present invention is to provide a control method for an indoor ventilation system, which can ventilate at an optimal air volume by analyzing the pollution degree and pressure distribution of indoor and outdoor air. The present invention provides an indoor ventilation system including: a ventilation unit which discharges indoor air to the outside and introduces outdoor air indoors; a supply pipe branching from the ventilation unit to supply the outdoor air to a first room, a second room, and an N^(th) room (N is a natural number greater than 2) located indoors; an exhaust pipe for sucking in the indoor air from the first room, the second room, and the N^(th) room (where N is a natural number greater than 2) and delivering the indoor air to the ventilation unit; and a control unit controlling operations of the ventilation unit, the supply pipe, and the exhaust pipe based on weather conditions and pollution levels of the indoor air and the outdoor air.

Description

Control method for a room ventilation system

The present invention relates to a control method of a ventilation device for exchanging indoor air with outdoor air, and more particularly, to a method for ventilating with an optimal air volume by analyzing the pollution degree and pressure distribution of outdoor air.

In general, the air in a closed space increases the content of carbon dioxide over time due to the breathing of living things, which interferes with the breathing of living things.

Therefore, when many people stay in a narrow space, such as an office or a house, it is necessary to frequently replace the indoor polluted air with outdoor fresh air through an indoor ventilation device.

On the other hand, indoors such as offices or houses are not composed of one space, but are divided into several rooms (ROOM). Accordingly, when configuring an indoor ventilation system, a diffuser connected to an exhaust duct and an air supply duct is installed in each room. It is common to install

1 is a perspective view showing the configuration of a conventional indoor ventilation device is shown.

In the related art, in the indoor ventilation device, as shown in FIG. 1 , a ventilation control unit 21 with a built-in blower and a distributor 22 are connected by an air supply duct 23, and the distributor 22 and the diffusers 24 installed in each room are provided. It is connected to the air supply duct 23, and the diffuser 24 and the ventilation control unit 21 in each room are mainly used to be connected by the exhaust duct 25.

In the conventional indoor ventilation device, when the ventilation fan of the ventilation control unit 21 is operated, external air is supplied to each room through the entire air supply duct 23 regardless of whether the room is used or not, and at the same time, through the entire exhaust duct 25 The internal air of each room is discharged, and accordingly, a load is applied to the blower built in the ventilation control unit 21, so that a lot of noise is generated during the ventilation process, and there is a problem in that energy is wasted due to high power consumption.

Patent Document 1: Republic of Korea Patent Publication No. 10-2011-0070123

An object of the present invention is to provide a control method for an indoor ventilation device that ventilates at an optimal air volume by analyzing the pollution degree and pressure distribution of indoor and outdoor air.

According to one aspect of the present invention, there is provided a method for controlling an indoor ventilation device, comprising: a ventilation unit for discharging indoor air to the outside and introducing outdoor air into the room; a supply pipe branching from the ventilation unit and supplying outdoor air to the first room, the second room, and the N-th room (N is a natural number greater than 2) located in the room; an exhaust pipe that draws in indoor air from the first room, the second room, and the N-th room (N is a natural number greater than 2) and delivers it to the ventilation unit; and a control unit configured to control operations of the ventilation unit, the supply pipe, and the exhaust pipe based on weather conditions, and pollution levels of the indoor air and the outdoor air,

(a) measuring the pollution levels of the first room, the second room, and the N-th room, respectively; and (b) controlling a supply amount of outdoor air supplied to the first room, the second room, and the N-th room based on the measured pollution level.

In this case, the method further includes a sensor unit for measuring the degree of pollution of the indoor air and the degree of pollution of the outdoor air, wherein the sensor unit includes: an indoor air sensor disposed in the first room, the second room, and the N-th room, respectively; and an outdoor air sensor disposed outdoors.

In addition, the ventilation unit may include: an exhaust chamber connected to the exhaust pipe for discharging the air of the first room, the second room, and the N-th room to the outside; an intake chamber connected to the supply pipe and supplying outdoor air to the first room, the second room, and the N-th room; and a connection chamber selectively connecting the exhaust chamber and the intake chamber.

Meanwhile, the exhaust chamber may include an exhaust fan for sucking air of the first room, the second room, and the N-th room from the exhaust pipe; and an exhaust shutter for determining whether to discharge indoor air, wherein the intake chamber includes: an intake fan connected to the supply pipe and configured to provide outdoor air to the first room, the second room, and the N-th room; and an intake shutter that determines whether outdoor air is inhaled.

In addition, the intake chamber may include a first filter disposed adjacent to the intake shutter; and a second filter disposed adjacent to the intake fan, wherein the connection chamber is disposed to be connected between the first filter and the second filter.

In addition, in step (b), the outdoor supply amount applied to each room may be differentially applied so that at least one of the first room, the second room, and the N-th room has a positive pressure or a negative pressure environment.

According to the control method of the indoor ventilation device according to the present invention,

First, since the output of the blowing fan can be automatically adjusted according to the ventilation area, the load of the blowing fan can be reduced, thereby reducing the ventilation noise.

Second, it can greatly contribute to energy saving by reducing power consumption.

Third, when the degree of pollution of the outside air is high, it is possible to prevent the inflow of pollutants by maintaining the positive pressure in the room.

Fourth, it is possible to prevent the spread of airborne contagious diseases during self-isolation by maintaining a specific room at negative pressure if necessary.

1 is a perspective view showing the configuration of a conventional indoor ventilation device.
2 is a flowchart illustrating a method for controlling an indoor ventilation device according to an embodiment of the present invention.
3 is a block diagram of an indoor ventilation device to which the control method of the present invention is applicable.
4 is a schematic diagram of a ventilation unit according to an embodiment.
5A illustrates the operation of the ventilation unit when the pollution degree of outdoor air is low.
5B illustrates the operation of the ventilation unit when the pollution degree of outdoor air is high.
6 is a cross-sectional view of a diffuser according to an embodiment.
7 is a cross-sectional view illustrating an operation of the diffuser of FIG. 6 .
8 is a layout view of an indoor ventilation device according to an embodiment.
9 is a schematic diagram of a ventilation unit of a form in which a total heat exchanger is further provided.

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings. In this case, it should be noted that in the accompanying drawings, the same components are denoted by the same reference numerals as much as possible. In addition, detailed descriptions of well-known functions and configurations that may obscure the gist of the present invention will be omitted. For the same reason, some components are exaggerated, omitted, or schematically illustrated in the accompanying drawings.

3 is a block diagram of an indoor ventilation apparatus according to an embodiment of the present invention, FIG. 4 is a schematic diagram of a ventilation unit according to an embodiment, and FIG. 5a explains the operation of the ventilation unit when the pollution degree of outdoor air is low. , Figure 5b describes the operation of the ventilation unit when the pollution degree of the outdoor air is high.

3 to 5 , the indoor ventilation apparatus 1000 according to the present invention includes a ventilation unit 100 , a supply pipe 200 , an exhaust pipe 300 , a control unit (not shown), and a sensor unit (not shown). includes

The ventilation unit 100 discharges indoor air to the outside and introduces outdoor air into the room. In general, 'indoor' means the interior space of a building, but the indoor ventilation device 1000 of the present invention is intended to be applied to a multi-family house such as an apartment. It is desirable to understand it as a living space.

The living space includes a living room, kitchen, bathroom and individual rooms. In the present invention, the ventilation unit 100 is configured to individually ventilate for each space in order to increase the efficiency of ventilation, rather than collectively ventilate the entire residential space.

For convenience of description, the divided spaces of the residential space will be described by calling them a first room (R-1), a second room (R-2) to an N-th room (R-N). (Where N is a natural number greater than 2), that is, the indoor ventilation apparatus 1000 of the present invention is applied to a residential space having a space of two or more rooms.

The supply pipe 200 is connected to the ventilation unit 100 to supply outdoor air to the first room R-1, the second room R-2 to the N-th room R-N. For individual ventilation control of each room, the supply pipe 200 branches from a common pipe and is connected in parallel to the first room R-1, the second room R-2 to the Nth room R-N, respectively. . The pipe branching to the first room (R-1) is classified as 200-1, the pipe branching to the second room (R-2) is classified as 200-2, and the pipe branching to the Nth room (R-N) is classified as 200-N. and shown. Although not shown, a control valve for controlling the amount of air flow may be provided at a branching point from the supply pipe 200 to each branch pipe, respectively. According to the embodiment, the supply pipe 200 may include an electric diffuser (D) provided at the end of each branched pipe (200-1, 200-2, 200-N) to control the supply amount of air. The electric diffuser D may be provided at the end of the exhaust pipe 300 as well as the supply pipe.

6 is a cross-sectional view of a diffuser according to an embodiment. Referring to FIGS. 6 and 7 , the electric diffuser D is a first passage P1 disposed in the center, a second passage P1 disposed in a shape surrounding the first passage P1 to form a concentric circle with the first passage P1. The passage P2 includes a third passage P3 disposed in a shape surrounding the second passage P2 so as to form a concentric circle with the second passage P2. The third passage P3 is connected to the end of the supply pipe 200 .

The electric diffuser (D) is a first stopper (M1) having a diameter corresponding to the inner diameter of the first passage (P1), a second stopper (M2) and a third having a diameter corresponding to the inner diameter of the second passage (P2) It includes a third stopper (M3) having a diameter corresponding to the inner diameter of the passage (P3). The first stopper (M1), the second stopper (M2), and the third stopper (M3) are respectively fixed to the pulling shaft (T) passing through the center to have a predetermined interval. The pulling shaft T is driven to have vertical movement by a driving motor MT disposed inside the electric diffuser D. According to the driving distance of the pulling shaft T, the first stopper M1 first blocks the first passage P1, and the second stopper M2 sequentially blocks the second passage P2 and the third stopper M3 blocks the third passage P3, so it is possible to adjust the flow rate of air passing through the electric diffuser D by controlling the driving of the pulling shaft T.

The exhaust pipe 300 inhales indoor air from the first room R-1, the second room R-2, and the N-th room R-N and delivers it to the ventilation unit 100 . Exhaust pipe 300 Also, for individual ventilation control of each room, the exhaust pipe 300 is branched from a common pipe to the first room (R-1), the second room (R-2) to the N-th room (R-N). Each is connected in parallel. The pipe branching to the first room (R-1) is classified as 300-1, the pipe branching to the second room (R-2) is classified as 300-2, and the pipe branching to the Nth room (R-N) is classified as 300-N. and shown. Although not shown, an intake port in the form of adjusting the intake air amount according to the needs may be provided at the end of each exhaust pipe 300-1, 300-2, 300-N.

A control unit (not shown) controls the operations of the ventilation unit 100 , the supply pipe 200 , and the exhaust pipe 300 based on the weather conditions and the pollution levels of indoor air and outdoor air.

The sensor unit (not shown) measures the pollution degree of indoor air and the pollution degree of outdoor air so that the control unit efficiently controls the ventilation unit 100 .

The sensor unit includes an indoor air sensor disposed in the first room R-1, the second room R-2 to the N-th room R-N, respectively, and an outdoor air sensor disposed outdoors.

Indoor air sensors and outdoor air sensors measure the concentration of fine dust in the air, carbon dioxide concentration, humidity and temperature. In other words, it measures the concentration of fine dust in the air (PM2.5, PM10, asbestos, etc.), carbon dioxide, humidity and temperature, and can measure carbon monoxide and volatile organic compounds (VOCs) if necessary.

Based on the indoor air information measured in each room, the control unit individually controls the ventilation in the specific room when the pollution level exceeds a comfortable level.

For example, when any one of the fine dust concentration, carbon dioxide concentration, humidity, and temperature in the first room R-1 exceeds a comfortable level, the control unit controls the ventilation unit 100 to control the The indoor air of R-1) is discharged to the outside, and the outdoor air flows into the first room (R-1).

The control unit may more efficiently control the ventilation unit 100 by interworking with a weather information or air information service through a wired or wireless network connection. Depending on the implementer, the control unit may be directly connected to the Internet to receive weather information/standby information, and the control unit may be connected to the user's information terminal (eg, smart phone) and weather information/standby through a dedicated application It may be configured to receive information. Alternatively, the control unit may transmit the current pollution level, ventilation state, or ventilation schedule of each room to the user terminal to assist the user in performing appropriate control as necessary.

The ventilation unit 100 may be implemented in the form shown in FIG. 4 for optimal ventilation of indoor air.

The ventilation unit 100 includes an exhaust chamber 110 , an intake chamber 120 , and a connection chamber 130 .

The exhaust chamber 110 is connected to the exhaust pipe 300 and discharges air from the first room R-1, the second room R-2 to the N-th room R-N to the outside.

The intake chamber 120 is connected to the supply pipe 200 and sucks in outdoor air and supplies it to the first room R-1, the second room R-2 to the N-th room R-N.

The connection chamber 130 selectively connects the exhaust chamber 110 and the intake chamber 120 according to control.

The exhaust chamber 110 includes an exhaust fan F-1 that sucks air in the first room R-1, the second room R-2 to the N-th room R-N from the exhaust pipe 300, and an indoor and an exhaust shutter (S-1) for determining whether or not to discharge air. The exhaust fan (F-1) rotates to generate an air flow in the left->right direction based on the city, and removes the air from the first room (R-1), the second room (R-2) to the N-th room (R-N). inhale The exhaust pipe 300 is provided with a valve or variable intake port for controlling individual intake in the pipe or intake port branching to each room, so that the first room (R-1), the second room (R-2) to Only one of the N-th rooms (R-N) can breathe air.

The air in each room sucked in by the exhaust fan F-1 is discharged to the outside through the exhaust shutter S-1. At this time, whether the exhaust shutter S-1 is opened is controlled according to the pollution degree of the outdoor air. The operation of the exhaust shutter S-1 will be described in detail with reference to FIGS. 5A and 5B .

The intake chamber 120 is connected to the supply pipe 200 and includes an intake fan F-2 and an intake shutter S-2. The intake fan F-2 supplies outdoor air to the first room R-1, the second room R-2 to the N-th room R-N. The intake fan (F-2) rotates to generate an air flow in the right->left direction based on the city standard, and the external air introduced through the intake shutter (S-2) is removed from the first room (R-1) and the second room (R). -2) to the Nth room (R-N). Similarly, the supply pipe 200 is provided with a control valve for controlling the amount of air flow at the branching point to the first room (R-1), the second room (R-2) to the N-th room (R-N), respectively. Accordingly, air may be provided in only one of the first room R-1, the second room R-2, and the N-th room R-N. The intake shutter S-2 determines whether outdoor air is inhaled.

The intake chamber 120 includes a first filter 121 disposed adjacent to the intake shutter S-2 and a second filter 122 disposed adjacent to the intake fan 122 . The connection chamber 130 is disposed to be connected between the first filter 121 and the second filter 122 . That is, the exhaust chamber 110 is connected between the first filter 121 and the second filter 122 through the connection chamber 130 .

The first filter 121 is a filter that blocks particles of about 10 micrometers (㎛). The second filter 122 is a filter including activated carbon and blocks particles of 2.5 micrometers (㎛) or less. An electrostatic dust collection type filter may be further included in the second filter 122 depending on the practitioner.

The connection chamber 130 includes a circulation control shutter S-3 for controlling the flow of air from the exhaust chamber 110 to the intake chamber 120 . Due to the opening of the circulation control shutter S-3, the air in the exhaust chamber 110 may pass through the second filter 122 without being discharged to the outside, and may be supplied back to each room in the room.

5A illustrates the operation of the ventilation unit when the pollution degree of outdoor air is low. When the control unit determines that the outdoor air is in a clean state by the outdoor air sensor or atmospheric information service connection, the control unit opens the exhaust shutter S-1 and intake shutter S-2, and the circulation control shutter S- 3) is controlled in the closed state so that indoor air is discharged to the outside and outdoor air is introduced into the room. In this case, the control unit may control the intake flow rate of the intake fan F-2 to exceed the exhaust flow rate of the exhaust fan F-1 so that the entire indoor space or a specific room has a positive pressure state as necessary.

Alternatively, the control unit may control the exhaust flow rate of the exhaust fan F-1 to exceed the intake flow rate of the intake fan F-2 so that the entire indoor space or a specific room has a negative pressure state as necessary. In other words, it is possible to prevent the spread of airborne infectious diseases during self-isolation by controlling a specific room to a negative pressure state.

5B illustrates the operation of the ventilation unit when the pollution degree of outdoor air is high. When the pollution level of the outdoor air is high, consumption of the second filter 122 occurs when the ventilation unit 100 is operated in the state of FIG. 5A . In order to efficiently use the second filter 122, the control unit controls the exhaust shutter S-1 and the intake shutter S-2 to be partially opened and the circulation control shutter S-3 to be fully opened, Control to be circulated in the ventilation unit 100 of the. Since the indoor polluted air is filtered by the second filter 122, the indoor pollution degree can be reduced. When the carbon dioxide concentration measured by the indoor air sensor exceeds the optimal state, the degree of opening of the intake shutter S-2 may be adjusted. When positive pressure is required for the entire indoor space or a specific room, the exhaust shutter S-1 may be controlled to be closed as necessary. Also, when the indoor air pollution level exceeds the outdoor air pollution level, the state of FIG. 5A may be switched.

8 is a layout view of an indoor ventilation device according to an embodiment. The indoor ventilation apparatus 1000 according to the present invention may be disposed in the form shown in FIG. 8 . In FIG. 8 , yellow is the end of the exhaust pipe 300 , and blue is the end of the supply pipe 200 . That is, the parts marked with blue and expanded colors are the parts on which the electric diffuser D disclosed in FIG. 6 is disposed. The exhaust pipe 300 is disposed in a portion passing through the center of the room, and the supply pipe 200 is symmetrically arranged around the arrangement position of the exhaust pipe 300 so that the air flow is made in one direction to increase ventilation efficiency. can As the indoor air flows as indicated by the green arrow, it is possible to minimize the spread of polluted air to other rooms.

9 is a schematic diagram of a ventilation unit of a form in which a total heat exchanger is further provided. The ventilation unit 100 is preferably implemented in the form of having a total heat exchanger as shown in FIG. The total heat exchanger performs temperature control using the discharged indoor air in order to prevent the outdoor air from flowing in as it is when the outdoor air is introduced into the room. Therefore, it is possible to reduce the use of electricity for cooling or heating by minimizing the change in the indoor temperature due to ventilation.

Although it has been described with reference to the above embodiments, it will be understood by those skilled in the art that various modifications and changes can be made to the present invention without departing from the spirit and scope of the present invention as set forth in the claims below. will be able

1000: indoor ventilation
100: ventilation unit
200: supply pipe
300: exhaust pipe

Claims (6)

a ventilation unit for discharging indoor air to the outside and introducing outdoor air into the room; a supply pipe branching from the ventilation unit and supplying outdoor air to the first room, the second room, and the N-th room (N is a natural number greater than 2) located in the room; an exhaust pipe that draws in indoor air from the first room, the second room, and the N-th room (N is a natural number greater than 2) and delivers it to the ventilation unit; and a control unit configured to control operations of the ventilation unit, the supply pipe, and the exhaust pipe based on a weather condition, the degree of pollution of the indoor air and the outdoor air,
(a) measuring the pollution levels of the first room, the second room, and the N-th room, respectively; and
(b) controlling a supply amount of outdoor air supplied to the first room, the second room, and the N-th room based on the measured pollution degree,
The indoor ventilation system,
a sensor unit for measuring the degree of pollution of the indoor air and the degree of pollution of the outdoor air;
The sensor unit is
an indoor air sensor disposed in the first room, the second room, and the N-th room, respectively; and
an outdoor air sensor disposed outdoors;
The ventilation unit is
an exhaust chamber connected to the exhaust pipe for discharging the air of the first room, the second room, and the N-th room to the outside;
an intake chamber connected to the supply pipe and supplying outdoor air to the first room, the second room, and the N-th room; and
a connection chamber selectively connecting the exhaust chamber and the intake chamber;
The exhaust chamber,
an exhaust fan for sucking air of the first room, the second room, and the N-th room from the exhaust pipe; and
an exhaust shutter for determining whether to exhaust indoor air;
The intake chamber is
an intake fan connected to the supply pipe and configured to provide outdoor air to the first room, the second room, and the N-th room; and
an intake shutter that determines whether outdoor air is inhaled;
The intake chamber is
a first filter disposed adjacent to the intake shutter; and
a second filter disposed adjacent to the intake fan;
The connection chamber is arranged to be connected between the first filter and the second filter,
The supply pipe is
It includes an electric diffuser (D) provided at the end of each branched pipe to control the supply amount of air,
The electric diffuser (D),
a first passage (P1) disposed in the center;
a second passage (P2) disposed in a shape surrounding the first passage (P1) to form a concentric circle with the first passage (P1); and
and a third passage (P3) disposed in a shape surrounding the second passage (P2) to form a concentric circle with the second passage (P2),
The third passage (P3) is connected to the end of the supply pipe (200),
The electric diffuser (D),
a first stopper (M1) having a diameter corresponding to the inner diameter of the first passage (P1);
a second stopper (M2) having a diameter corresponding to the inner diameter of the second passage (P2); and
and a third stopper (M3) having a diameter corresponding to the inner diameter of the third passage (P3),
The first stopper (M1), the second stopper (M2), and the third stopper (M3) are respectively fixed to a pulling axis (T) passing through the center to have a predetermined interval,
The pulling axis (T) is,
The indoor ventilation system control method, characterized in that it is driven to have vertical movement by a driving motor (MT) disposed inside the electric diffuser (D). delete delete delete delete The method according to claim 1,
Step (b) is,
The indoor ventilation system control method, characterized in that the outdoor supply amount applied to each room is differentially applied so that at least one of the first room, the second room, and the N-th room has a positive pressure or a negative pressure environment.

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