KR102645951B1 - Ventilator - Google Patents

Abstract

The ventilation device according to the present invention includes an exhaust fan having a first exhaust chamber having an exhaust inlet through which indoor air flows in, an exhaust outlet communicating with the first exhaust chamber and discharging indoor air via the first exhaust chamber to the outdoors. This built-in second exhaust chamber, a first air supply chamber having a supply air inlet through which outdoor air flows in, and an air supply fan that communicates with the first air supply chamber and has a supply air outlet that supplies outdoor air to the room via the first air supply chamber. It has a built-in second air supply chamber, and a total heat exchanger disposed at an intersection between the first air supply chamber and the second air supply chamber and between the first exhaust chamber and the second exhaust chamber, and the exhaust inlet is adjacent to the kitchen in the living room. and a device main body connected to a plurality of rooms through an exhaust duct, and wherein the air supply outlet is connected to a living room and a plurality of rooms through an air supply duct. and a control unit linked to the device main body, wherein the control unit, when receiving an operation signal from a hood provided in the kitchen, sets an exhaust blocking mode to close the exhaust outlet of the second exhaust room, and an exhaust blocking mode to close the exhaust outlet of the second exhaust room. A first air supply mode that supplies air to at least the living room through the air supply duct and a second air supply mode that supplies indoor air to the hood from a fan box installed in the kitchen through the exhaust duct are controlled to operate in conjunction.

Description

Ventilator {VENTILATOR}

The present invention relates to a ventilation device that ventilates a room.

In general homes and offices, air-conditioning and heating devices are installed to cool and heat indoors according to seasonal changes. These air-conditioning devices perform cooling and heating by cooling and heating indoor air. , boilers, etc.

The indoor spaces of general homes and offices where such cooling and heating devices are installed are maintained in a sealed state to improve cooling and heating efficiency, and the air pollution level in sealed indoor spaces increases after a certain period of time. A foul odor occurs or foreign substances such as dust become floating.

Meanwhile, when the hood is activated when cooking indoors, the indoor air pressure becomes increasingly negative. If this condition continues for more than a certain period of time, outdoor air containing fine dust easily flows in through the gaps in the indoor window, polluting the indoor space.

In addition, if the room is excessively sealed, contaminants are not discharged to the outside, which can pose serious health concerns to users.

To improve this, a ventilation device, etc. is used to supply air to the room. Due to air circulation, when it is cold or hot outside, the user can feel the cold draft of the supplied air and the high temperature and humidity. , this may cause discomfort to users, so improvement is needed.

Republic of Korea Patent Publication No. 10-2017-0075385

The present invention was created to solve the above problems, and its purpose is to provide a ventilation device that prevents the user from feeling the cold air and high temperature/humidity of the supplied air when operating the hood.

In order to achieve the above object, a ventilation device according to an embodiment of the present invention includes a first exhaust chamber having an exhaust inlet through which indoor air flows, an indoor air outlet that communicates with the first exhaust chamber and passes through the first exhaust chamber. A second exhaust chamber having an exhaust outlet for discharging air to the outdoors and a built-in exhaust fan, a first air supply chamber having an air supply inlet through which outdoor air flows in, and an outdoor air supply chamber communicating with the first air supply chamber and passing through the first air supply chamber. A second air supply chamber having an air supply outlet for supplying air into the room and a built-in air supply fan, and a total heat exchanger disposed at the intersection between the first air supply chamber and the second air supply chamber and between the first exhaust chamber and the second exhaust chamber. An apparatus main body including, wherein the exhaust inlet is connected to the living room adjacent to the kitchen and a plurality of rooms through an exhaust duct, and the air supply outlet is connected to the living room and a plurality of rooms through an air supply duct; and a control unit linked to the device main body, wherein the control unit, when receiving an operation signal from a hood provided in the kitchen, sets an exhaust blocking mode to close the exhaust outlet of the second exhaust room, and an exhaust blocking mode to close the exhaust outlet of the second exhaust room. A first air supply mode that supplies air to at least the living room through the air supply duct and a second air supply mode that supplies indoor air to the hood from a fan box installed on the ceiling of the kitchen through the exhaust duct are controlled to operate in conjunction.

Here, the exhaust duct is connected to the fan box, the fan box is equipped with a first damper at a connection portion with the exhaust duct and an air supply blowing fan is mounted on one side, and the control unit controls the second air supply. In this mode, the first damper of the fan box can be controlled to open and the air supply blowing fan can be controlled to operate so that indoor air is supplied to the hood through the exhaust duct and the fan box.

And, in one embodiment, the air supply duct is connected to the fan box and the kitchen duct, the fan box is equipped with a second damper at the connection portion with the air supply duct, and the control unit, in the first air supply mode, operates externally. The second damper of the fan box is controlled to open so that outdoor air is mixed with indoor air in the fan box through the first air supply chamber, the second air supply chamber, and the air supply duct and is supplied to the hood, and the air supply blowing fan is operated. Operation can be controlled.

Here, as an example, the control unit, in the second air supply mode, controls to close the flow rate control member mounted on the living room exhaust inlet of the exhaust duct provided in the living room so that indoor air flows into the exhaust duct only in a plurality of rooms. can do.

And, in the first air supply mode, the control unit closes and controls the flow control member mounted on the air supply outlet of the air supply duct provided in each of the plurality of rooms to supply outdoor air introduced into the air supply duct only to the living room. can do.

Meanwhile, a dust collection filter may be installed at the rear end of the first damper within the fan box.

Also, the first damper and the second damper may be backflow prevention dampers.

Meanwhile, the control unit may be configured to control the exhaust blocking mode, the first air supply mode, and the second air supply mode to last for a certain period of time and then stop after receiving the operation signal of the hood.

The ventilation device according to the present invention adopts a control configuration in which the control unit operates in conjunction with the exhaust blocking mode, the first air supply mode, and the second air supply mode after receiving an operation signal from the hood, thereby increasing the temperature of the low temperature outdoor air. By adjusting the hot and humid outdoor air to an appropriate temperature and lowering the humidity, it has the effect of preventing discomfort to the user by preventing the user indoors from feeling cold or hot and humid conditions.

Figure 1 is a diagram showing a ventilation device according to an embodiment of the present invention, and an air supply duct and an exhaust duct connected to the ventilation device.
FIG. 2 is a flow chart showing the operation process by the ventilation device of FIG. 1.
3 to 5 show various embodiments of the first air supply mode and the second air supply mode by the ventilation device of FIG. 1.

Hereinafter, the present invention will be described in detail through exemplary drawings. When adding reference numerals to components in each drawing, please note that the same components are given the same reference numerals as much as possible even if they are shown in different drawings. Additionally, in describing the present invention, if it is determined that a detailed description of a related known configuration or function may obscure the gist of the present invention, the detailed description will be omitted.

Figure 1 is a diagram showing a ventilation device according to an embodiment of the present invention, and an air supply duct and an exhaust duct connected to the ventilation device, Figure 2 is a flow chart showing the operation process by the ventilation device of Figure 1, and Figure 3 to Figure 5 are various embodiments showing the first air supply mode and the second air supply mode by the ventilation device of Figure 1.

Referring to the drawings, the ventilation device according to the present invention includes a device main body 100 and a control unit (C).

Here, the device main body 100 includes a first exhaust chamber 110, a second exhaust chamber 120, a first air supply chamber 130, a second air supply chamber 140, and a total heat exchanger 150. It can be provided.

The first exhaust chamber 110 has an exhaust inlet 110a through which indoor air flows, that is, return air (RA) flows in.

This exhaust inlet 110a is connected to the exhaust duct 10, which has a structure extending into the living room and a plurality of rooms.

In addition, the exhaust duct 10 has a living room exhaust inlet 10a formed at the end of the living room to exhaust the indoor air from the living room, and a living room exhaust inlet 10a through which the indoor air from the living room flows in, and a living room exhaust inlet 10a is formed at the end of the room to exhaust the indoor air from the room. A room exhaust inlet (10b) through which indoor air flows into the room is formed.

A flow control member 11 may be installed in each of the living room exhaust inlet (10a) and the room exhaust inlet (10b), and the living room exhaust inlet (10a) and the room exhaust inlet may be connected depending on the degree of opening and closing of the flow control member (11). The amount of indoor air flowing into (10b) can be adjusted or the inflow itself can be blocked.

In addition, the second exhaust chamber 120 has a structure that communicates with the first exhaust chamber 110, and is specifically connected through a total heat exchanger 150.

This second exhaust chamber 120 has an exhaust outlet 120a through which indoor air passing through the first exhaust chamber 110 is discharged to the outdoors, that is, exhaust air (EA) flows out to the outside.

In addition, the second exhaust chamber 120 is equipped with an exhaust fan 121 inside, and by the operation of the exhaust fan 121, indoor air is drawn in through the exhaust duct 10 and the first exhaust chamber 110. do.

In addition, the first air supply chamber 130 has an air supply inlet 130a through which outdoor air (OA) flows in.

In addition, the second air supply chamber 140 has a structure in communication with the first air supply chamber 130, and is specifically connected through a total heat exchanger 150.

This second air supply chamber 140 has a supply air outlet 140a through which outdoor air via the first air supply chamber 130 is supplied indoors, that is, supply air (SA, Supply Air) flows out.

This air supply outlet (140a) is connected to the air supply duct 20, which has a structure extending into the living room and a plurality of rooms.

In addition, the air supply duct 20 has a living room air supply outlet 20a formed at the end of the living room side through which outdoor air flows out in order to supply outdoor air into the living room, and a living room air outlet 20a through which outdoor air flows out is formed on the living room side to supply outdoor air into the room. An air discharge outlet (20b) through which outdoor air flows out is formed at the end.

A flow control member 11 may be installed in each of the living room air supply outlet (20a) and the air supply outlet (20b), and depending on the degree of opening and closing of the flow control member 11, the living room air supply outlet (20a) and the air supply outlet (20b) may be installed. The outflow amount of outdoor air flowing out of the outlet 20b can be adjusted or the outflow itself can be blocked.

In addition, the second air supply chamber 140 is equipped with an air supply fan 141 inside, and by the operation of the air supply fan 141, external outdoor air is drawn in through the first air supply chamber 130.

Meanwhile, the control unit (C) is linked to the device main body 100, and as shown in the drawing, it can have a structure directly connected to the device main body 100, and although not shown in the drawing, it can be used like an intermediate control device. It can have a structure that is spaced apart from the device main body, and can furthermore have a structure that is placed in the living room and each room like a room controller.

That is, of course, the control unit (C) can have any conventional shape and arrangement as long as it is electrically connected to the device body 100 in a wired or wireless manner.

As shown in FIG. 2, the control unit C can be selectively operated in one of the ventilation operation, cleaning operation, and cooking operation processes.

At this time, the ventilation operation is a process of ventilating the room by supplying outdoor air into the room while exhausting the indoor air, and the cleaning operation is a process of circulating and filtering the indoor air through the device body 100 without exhausting the indoor air to the outside to purify the indoor air. It is a process that purifies the food, and the cooking operation is a process that provides air supply so that it can be smoothly exhausted through the hood when cooking in the kitchen. The present invention provides a cooking operation process in which the user does not feel the cold draft of supplied air and the high temperature and humidity during the cooking operation.

Specifically, when the control unit C receives an operation signal from the hood 1 provided in the kitchen, it controls the exhaust blocking mode, the first air supply mode, and the second air supply mode to operate in conjunction with each other.

First, the control unit (C) is electrically connected to the operating motor of the hood (1), and receives an operating signal when the operating motor of the hood (1) is activated.

In addition, the exhaust blocking mode is a mode in which the control unit (C) closes the exhaust outlet (120a) of the second exhaust chamber 120, and the control unit (C) closes the exhaust outlet door (not shown) mounted on the exhaust outlet (120a). ) is achieved by closed control.

In this exhaust blocking mode, even if the exhaust fan 121 of the second exhaust chamber 120 is operated, indoor air is blocked from being discharged to the outside through the second exhaust chamber 120.

For reference, exhaust blocking in the exhaust blocking mode means blocking the final discharge of indoor air to the outside, and exhausting indoor air through the exhaust duct 10, which will be described later, involves sucking indoor air into the exhaust duct 10. This means that it only flows into the device body 100 and is not discharged to the outside.

In addition, the first air supply mode is a mode in which the control unit (C) supplies external outdoor air through the air supply duct 20 to at least the living room, that is, the living room or the living room and the room, and the control unit (C) supplies the external air to the living room through the air supply duct 20. This is achieved by controlling the operation of the air supply fan 141 in the air chamber 140.

In addition, the second air supply mode is a mode in which indoor air is supplied from the fan box 90 to the hood side through the exhaust duct 10, and the indoor air sucked into the exhaust duct 10 is supplied to the hood rather than the device main body 100. This is achieved by flowing it to the fan box (90) and then blowing from the fan box (90) to the hood (1).

As described above, in the second air supply mode, the indoor air sucked through the exhaust duct 10 is guided to the kitchen fan box 90 and supplied to the kitchen, thereby increasing the temperature of the air supplied to the kitchen by utilizing the indoor air. As an example, by raising the temperature of the outdoor air taken in in the winter or lowering the temperature and humidity of the hot and humid outdoor air taken in in the summer, indoor users can avoid cold air and hot and humid conditions from the supplied air. You may not feel it.

Furthermore, after receiving the operation signal of the hood 1, the control unit C can control the exhaust blocking mode, first air supply mode, and second air supply mode to last for a certain period of time and then stop.

In this way, the control unit (C) may be configured with a timer control function. As an example, after the user operates the hood (1) during cooking, the user forgets to stop the operation of the hood (1) even after cooking is completed. ), if the operation is maintained for too long, this is to prevent it from continuously operating in the cooking operation process and to allow the operation to be switched to the ventilation or cleaning operation process.

Then, here, various embodiments related to the first air supply mode and the second air supply mode will be examined with reference to FIGS. 2 to 5.

First, in one embodiment as shown in FIG. 3, the control unit (C) supplies outdoor air to the living room and a plurality of rooms in the first air supply mode, and supplies indoor air from the living room and a plurality of rooms in the second air supply mode. A control configuration is adopted in which air is sucked into the fan box 90 and then air is supplied to the kitchen.

Specifically, the exhaust duct 10 is connected to a fan box 90 installed on the ceiling of the kitchen, and the fan box 90 has a first damper 91 installed at a connection portion with the exhaust duct 10 and An air supply blowing fan 93 may be mounted on the side.

At this time, the fan box 90 is a box member with an internal space that can accommodate indoor air introduced through the exhaust duct 10, and air is supplied to the kitchen through the part where the air supply blowing fan 93 is mounted. Of course, the specific shape structure is not limited by the present invention, as long as it is configured as possible.

In addition, the first damper 91 allows indoor air to flow into the fan box 90 when opened and blocks the indoor air from flowing into the fan box 90 when closed. It is configured to adjust the amount of inflow, but the specific shape and operation structure are not limited by the present invention, and of course, any conventional damper such as an electric damper or a backflow prevention damper can be used.

Based on this configuration, the control unit (C) controls the first air supply of the fan box 90 so that indoor air is supplied to the hood 1 through the exhaust duct 10 and the fan box 90 in the second air supply mode. The damper 91 can be controlled to open and the air supply blowing fan 93 can be operated and controlled.

Additionally, a dust collection filter 94 may be installed at the rear end of the first damper 91 within the fan box 90.

This dust collection filter 94 filters and purifies various foreign substances such as dust contained in the indoor air when the indoor air sucked through the exhaust duct 10 enters the fan box 90 through the first damper 91. perform its role. For reference, it goes without saying that the above-described first damper 91, air supply fan 93, and dust collection filter 94 are also installed in the fan box 90 of FIGS. 4 and 5.

In the present invention, controlling various devices or devices through the control unit (C) includes electrically connecting the various devices or devices to the control unit (C) or communicating wirelessly with the corresponding device, mechanism, or member, and furthermore, other relays. Signals may also be transmitted through the device.

For reference, comparing the air flow rate ratio in the embodiment shown in FIG. 3 as an example, under the condition that 200% of indoor air is discharged through the hood 1, as a compensation, the external air from the device main body 100 After inhaling 200 units of air, 30 units are supplied to each of room 1 and room 2, 40 units to each room 3, and 50 units each to living room 1 and living room 2 through the air supply duct (20).

In addition, the device body 100 inhales 15 indoor air from each of Room 1 and Room 2, 20 from Room 3, and 25 from each of Living Room 1 and Living Room 2 through the exhaust duct 10, for a total of 100. After further suction, 100 is supplied to the kitchen through the fan box (90).

Meanwhile, in the embodiments shown in FIGS. 4 and 5, the control unit C adopts a control configuration that mixes the exhausted indoor air with outdoor air in the fan box 90 and supplies it to the kitchen.

Specifically, the air supply duct 20 may be connected to the fan box 90 and the kitchen duct 40 before reaching a plurality of rooms and the living room.

At this time, the fan box 90 may be equipped with a second damper 92 at a connection portion with the air supply duct 20.

The second damper 92 allows outdoor air to flow into the fan box 90 when opened and blocks the outdoor air from flowing into the fan box 90 when closed, and also blocks the inflow of outdoor air into the fan box 90. It is configured to adjust, but the specific shape and operation structure are not limited by the present invention, and of course, any conventional damper such as an electric damper or a backflow prevention damper can be used.

In addition, in the first air supply mode, the control unit (C) causes external outdoor air to flow from the fan box 90 through the first air supply chamber 130, the second air supply chamber 140, and the air supply duct 20 to the hood ( 1) The second damper 92 of the fan box 90 can be controlled to open and the air supply blowing fan 93 can be controlled to supply air to the side.

At this time, the control unit (C) guides indoor air to the fan box 90 through the exhaust duct 10 in the second air supply mode. According to the control configuration of the first air supply mode and the second air supply mode, the fan box 90 ), outdoor air and indoor air are sucked in and mixed, and then air can be supplied to the hood (1) by the air supply fan (93).

In this way, the present invention adopts a control configuration in which the first air supply mode and the second air supply mode are operated in conjunction when an operation signal of the hood (1) is received, so that the exhaust action through the hood (1) is smooth when cooking in the kitchen. This can be achieved, and at the same time, as the indoor air is mixed with the supplied outdoor air, the user does not feel cold, hot, and humid from the supplied air.

Furthermore, in the first air supply mode, the control unit (C) controls the air supply outlet (20b) of the air supply duct (20) provided in each of the plurality of rooms to supply the outdoor air drawn into the air supply duct (20) only to the living room. The mounted flow control member 21 can be controlled to close.

Since the kitchen in which the hood 1 is installed is located adjacent to the living room rather than the room, the control unit C controls the outdoor air introduced in the air supply duct 20 to be supplied only to the living room, not to the room, as described above. By adopting this configuration, the air supply action to the kitchen can be made more effective.

In other words, if the air supply is supplied only to the living room rather than divided into the living room and the room, the air pressure in the living room becomes higher, so the air supply action to the kitchen adjacent to the living room can be implemented more effectively.

And referring to FIG. 5, in the second air supply mode, the control unit (C) opens the living room exhaust inlet ( The flow control member 11 mounted on 10a) can be controlled to close.

In this way, the indoor air used for supply air can only be used as indoor air exhausted from multiple rooms excluding the living room, which is located relatively far away from the kitchen while maintaining the warm indoor air in the living room adjacent to the kitchen. By exhausting and recycling only the indoor air of the room, the air supplied to the kitchen can be maintained at the highest possible temperature.

For reference, comparing the air flow rate ratio in the embodiment shown in FIG. 4 as an example, under the condition that 200% of indoor air is discharged through the hood 1, as a counterpart to this, the outside air is discharged from the device main body 100. After inhaling 200% of air, 50% is supplied to each of living room 1 and living room 2 through the air supply duct (20), and 100% is supplied to the fan box (90) through the kitchen duct (40).

In addition, the device body 100 inhales 15 indoor air from each of Room 1 and Room 2, 20 from Room 3, and 25 from each of Living Room 1 and Living Room 2 through the exhaust duct 10, for a total of 100. After further suction, 100 is flowed into the fan box (90).

Ultimately, 100% of outdoor air and 100% of indoor air are mixed in the fan box (90), and 200% of the air is supplied to the kitchen hood (1).

5, for example, comparing the air flow rate ratio in the embodiment shown in FIG. 5, under the condition that 200% of indoor air is discharged through the hood 1, as a compensation, the external outdoor air is discharged from the device main body 100. After sucking in 200, 50 is supplied to each of living room 1 and living room 2 through the air supply duct (20), and 100 is flowed to the fan box (90) through the kitchen duct (40).

In addition, the device body 100 inhales 15 indoor air from rooms 1 and 2 and 20 from room 3 through the exhaust duct 10, for a total of 50, and then inhales 50 indoor air through the fan box 90. moves.

Ultimately, 100% of outdoor air and 50% of indoor air are mixed in the fan box (90), and 150% of the air is supplied to the kitchen hood (1).

As a result, the ventilation device according to the present invention adopts a control configuration in which the control unit (C) operates the exhaust blocking mode, the first air supply mode, and the second air supply mode in conjunction after receiving the operation signal of the hood (1), By raising the temperature of the cold outdoor air or adjusting the hot and humid outdoor air to an appropriate temperature and lowering the humidity, it is possible to prevent users indoors from feeling cold and hot and humid conditions, thereby preventing discomfort to users. You can.

As described above, although the present invention has been described with limited examples and drawings, the present invention is not limited thereto, and the technical idea of the present invention and the following will be understood by those skilled in the art to which the present invention pertains. Of course, various modifications and variations are possible within the scope of equivalence of the patent claims to be described.

1: Hood
10: exhaust duct 10a: living room exhaust inlet
10b: Room exhaust inlet 11: Flow control member
20: air supply duct 20a: living room air outlet
20b: Water discharger outlet 21: Flow control member
40: Kitchen duct
90: fan box 91: first damper
92: second damper 93: air supply fan
94: Dust collection filter
100: device body
110: first exhaust chamber 110a: exhaust inlet
120: second exhaust chamber 120a: exhaust outlet
121: exhaust fan
130: first air supply room 130a: air supply inlet
140: second air supply chamber 140a: supply air outlet
141: air supply fan
150: Total heat exchanger C: Control unit

Claims (8)

A first exhaust chamber having an exhaust inlet through which indoor air flows in, a second exhaust chamber with a built-in exhaust fan and an exhaust outlet communicating with the first exhaust chamber and discharging indoor air via the first exhaust chamber to the outdoors; A first air supply chamber having an air supply inlet through which outdoor air flows in, a second air supply chamber connected to the first air supply chamber and having an air supply fan built into the air supply outlet and supplying outdoor air through the first air supply chamber into the room, and a total heat exchanger disposed at an intersection between the first air supply chamber and the second air supply chamber and between the first exhaust chamber and the second exhaust chamber, wherein the exhaust inlet is connected to the living room adjacent to the kitchen and a plurality of rooms through an exhaust duct. an apparatus main body in which the air supply outlet is connected to a living room and a plurality of rooms through an air supply duct; and
It includes a control unit linked to the device main body,
The control unit,
When an operation signal from the hood provided in the kitchen is received,
An exhaust blocking mode that closes the exhaust outlet of the second exhaust chamber,
A first air supply mode that supplies external outdoor air to at least the living room through the air supply duct, and
Controlling the second air supply mode to operate in conjunction with supplying indoor air from a fan box installed on the ceiling of the kitchen to the hood through the exhaust duct,
The air supply duct is connected to the fan box and the kitchen duct, and the fan box is a ventilation device in which a second damper is installed at a connection portion with the air supply duct.
According to paragraph 1,
The exhaust duct is connected to the fan box, and the fan box has a first damper mounted on a connection portion with the exhaust duct and a supply air blowing fan mounted on one side,
The control unit,
In the second air supply mode, the ventilation device is characterized in that the first damper of the fan box is controlled to open and the air supply blowing fan is controlled to operate so that indoor air is supplied to the hood through the exhaust duct and the fan box.
According to paragraph 2,
The control unit,
In the first air supply mode, the second damper of the fan box is opened so that external outdoor air is mixed with indoor air in the fan box through the first air supply chamber, the second air supply chamber, and the air supply duct and is supplied to the hood. A ventilation device characterized in that it controls and operates the air supply blower fan.
According to paragraph 2,
The control unit,
In the second air supply mode, a ventilation device characterized in that a flow control member mounted on the living room exhaust inlet of the exhaust duct provided in the living room is controlled to close so that indoor air flows into the exhaust duct only in a plurality of rooms.
According to paragraph 2,
The control unit,
In the first air supply mode, ventilation is characterized in that the flow control member mounted on the air supply outlet of the air supply duct provided in each of the plurality of rooms is controlled to close so that the outdoor air introduced into the air supply duct is supplied only to the living room. Device.
According to paragraph 2,
A ventilation device, characterized in that a dust collection filter is installed at a rear end of the first damper in the fan box.
According to paragraph 3,
A ventilation device, characterized in that the first damper and the second damper are backflow prevention dampers.
According to paragraph 1,
The control unit,
A ventilation device, characterized in that, after receiving an operation signal from the hood, the exhaust blocking mode, the first air supply mode, and the second air supply mode are controlled to last for a certain period of time and then stop.

Images