KR100577208B1 - Ventilation system - Google Patents

Abstract

TECHNICAL FIELD The present invention relates to a ventilation system, and more particularly, to a ventilation system that can be easily installed and that pressure loss and noise are reduced.

To this end, the present invention is a multi-window 110 is installed so that at least three or more windows are spaced apart from each other; It is installed so as to surround the edge of the multi-window 110, so that the partitioned space between the multi-window 110 and the interior and exterior communicate with each other to form the first and second flow paths with the space between the multi-window 110 Frame 120; In addition, a ventilation system installed in the frame 120 and configured to discharge indoor and outdoor air to the outside of the room through the first passage 125 and the second passage 126 provides a ventilation system.

The present invention also provides a ventilation system in which the first and second flow paths are formed in the ventilation system so as to cross each other, and an electrothermal exchanger is installed at the intersection of the first and second flow paths.

Ventilation system

Description

Ventilating system

1 is a perspective view showing a first embodiment of a ventilation system according to the present invention;

Figure 2 is a side view showing the configuration of the ventilation system of FIG.

Figure 3 is a side view showing a second embodiment of the ventilation system according to the present invention.

4 is a side view showing a modification of the ventilation system of FIG.

Figure 5 is a side view showing a third embodiment of the ventilation system according to the present invention.

Figure 6 is a side view showing a fourth embodiment of the ventilation system according to the present invention.

Explanation of symbols on the main parts of the drawings

110: multiple window 111, 112, 113: window

114,115 1,2 euro 120: frame

121: first suction unit 122: first discharge unit

123: second suction unit 124: second discharge unit

121a, 122a, 124a: Grill part 123a: Filter

131: first vent means 132: second vent means

131a and 132a: fan motor 131b and 132b: cross flow fan

240: total heat exchanger

TECHNICAL FIELD The present invention relates to a ventilation system, and more particularly, to a ventilation system that can be easily installed and that pressure loss and noise are reduced.

In general, the windows in the building mainly serve as a light receiving light, and by opening and closing the windows to use the role of ventilating the air in the room.

Such windows do not intentionally ventilate the room because of the strong wind or rainy weather when rain or dust enters the room. In addition, even if the yellow dust phenomenon and air pollution is severe, most of the room is not ventilated.

As such, there is a problem that you want to ventilate the room but not ventilate according to the surrounding environment. Therefore, in recent years, there is an urgent need for a device capable of ventilating the indoor space when desired without being affected by the surrounding environment.

On the other hand, although the indoor space is ventilated by installing a ventilator on a ceiling or a wall of a building, such a ventilator is built in the ceiling and penetrates a wall to install a duct. Therefore, the length of the duct can not only be long, there is a problem that the installation cost and installation time of the ventilation device increases.

In addition, the ventilator has a pressure loss and noise increase due to the set resistance and duct resistance of the flow air, it is necessary to install a large capacity fan by this pressure loss. Therefore, there was a problem in that the low noise fan and the sound absorbing material must be separately installed.

 In order to solve the above problems, the present invention can be easily installed, and an object thereof is to provide a ventilation system in which pressure loss and noise are reduced.

In order to achieve the above object, according to a first embodiment of the present invention, at least three or more windows are installed to be spaced apart from each other; A frame installed to surround the edges of the multiple windows and allowing the partitioned space between the multiple windows to communicate with each other indoor and outdoor to form first and second flow paths together with the spaces between the multiple windows; And, it is provided in the frame, and provides a ventilation system comprising a: ventilation device for discharging indoor and outdoor air to the outside through the first passage and the second passage.

In the frame, a first suction part and a first discharge part are formed to communicate with the first flow path, and a second suction part and a second discharge part are formed to communicate with the second flow path.

The ventilation device may include: first ventilation means installed on the first suction part or the first discharge part; And a second ventilation means installed in the second suction part or the second discharge part.

At this time, the first vent means is installed to discharge the indoor air to the outside through the first flow path, the second vent means is preferably installed to discharge the outdoor air into the room through the second flow path.

According to a second embodiment of the present invention, at least three or more windows are installed to be spaced apart from each other; It is installed to surround the rim of the multi-window, and the partitioned space between the multi-window and indoor and outdoor communication to form a first and second flow path with the space between the multi-window, the first and second flow path intersect A frame formed to be; A ventilation device installed in the frame and discharging indoor and outdoor air to the outside and the outside through the first and second flow paths; In addition, the first and second flow paths of the frame intersects with each other, the heat exchanger: to provide a heat exchange for the air sucked through the first and second flow paths to provide a ventilation system comprising a.

In the frame, a first suction part and a first discharge part are formed to communicate with the first flow path, and a second suction part and a second discharge part are formed to communicate with the second flow path. At this time, the flow path of the first suction part and the second discharge part is formed to cross, or the flow path of the first discharge part and the second suction part is formed to cross.

The ventilation device may include a first ventilation means installed in the first suction part or the first discharge part; And a second ventilation means installed in the second suction part or the second discharge part.

The first vent means is installed to discharge the indoor air to the outside through the first flow path, the second vent means is installed to discharge the outdoor air into the room through the second flow path.

According to a third embodiment of the present invention, a frame surrounding at least one pair of first and second flow paths surrounding an edge of a window and communicating indoors and outdoors is formed, and the first and second flow paths are formed to cross each other; A ventilation device installed at the first and second flow paths to suck air in and out of the room; In addition, it provides a ventilation system comprising a total heat exchanger: which is installed to heat exchange while the indoor and outdoor air passes through the intersection of the first and second flow paths.

In the frame, a first suction part and a first discharge part are formed to communicate with the first flow path, and a second suction part and a second discharge part are formed to communicate with the second flow path.

The ventilation device may include first ventilation means installed in the first passage; And a second ventilation means installed in the second flow passage.

The first vent means is installed to discharge the indoor air to the outside through the first flow path, the second vent means is installed to discharge the outdoor air into the room through the second flow path.

The first suction part is formed to face the second suction part, and the first discharge part is opposite to the second discharge part.

At this time, it is preferable that a total heat exchanger is installed between the first suction part and the second suction part, and first and second ventilation means are installed on the upstream side or the downstream side in the air flow direction of the total heat exchanger.

The second suction part and the second discharge part may be formed to face each other, and the first suction part and the first discharge part may be alternately formed based on the second flow path.

At this time, it is preferable that the total heat exchanger is formed near the second suction part, and the first and second ventilation means are installed on the upstream side or the downstream side in the air flow direction of the total heat exchanger.

Hereinafter, a first embodiment of the ventilation system according to the present invention will be described with reference to FIGS. 1 and 2.

1 is a perspective view showing a first embodiment of the ventilation system according to the present invention, Figure 2 is a side view showing the configuration of the ventilation system of FIG.

1 and 2, the ventilation window frame includes a multiple window 110, a frame 120, and a ventilation device 130.

The multiple windows 110 are installed such that at least three or more windows 111, 112, and 113 are spaced apart from each other. The multi-window 110 is made of glass or synthetic resin, preferably a transparent window. Of course, opaque windows may be applied.

The frame 120 is installed to surround the edge of the multiple window 110. The frame 120 communicates the partitioned space between the multi-window 110 and indoor and outdoor to form first and second flow paths 114 and 115 together with the space between the multi-window 110.

In this case, a first suction part 121 and a first discharge part 122 are formed in the frame 120 so as to communicate with the first flow path 114, and the second flow path communicates with the second flow path 115. The suction part 123 and the second discharge part 124 are formed.

For example, as shown in FIG. 1, the first suction part 121 is installed on the lower side of the frame 120, and the first discharge part 122 is installed on the upper side of the frame. In addition, the second suction part 123 is installed on the upper side of the frame, and the second discharge part 124 is installed on the lower side of the frame.

The first and second suction discharge parts 121, 122, 123, and 124 may be installed on both sides as well as the upper and lower sides of the frame 120, and may be installed on the upper side or the lower side and both sides.

The frame 120 is formed in a rectangular frame shape as shown in FIG. Of course, it is also understood that the shape of the frame may be variously formed in a circular or oval shape according to the design.

In addition, the frame 120 is fixed so as not to open and close the multiple window (110). In addition, it can be understood that the rail can be formed on the lower side of the frame so that the multi-window 110 can be opened and closed.

In this case, a ventilator 130 (see FIG. 1) is installed in the frame 120 to discharge indoor and outdoor air to the outside through the first passage 114 and the second passage 115.

The ventilation device may include a first ventilation unit 131 installed in the first suction unit 121 or the first discharge unit 122, and a second suction unit 123 or the second discharge unit 124. It is configured to include a second vent means 132 is installed.

The first and second ventilating means 131 and 132 may include fan motors 131a and 132a and vent fans 131b and 131b.

In this case, the crossflow fan is presented as a crossflow fan. This is because the crossflow fan has a small and long rotation radius, so that the crossflow fan is suitable to be installed on the frame and sufficient air volume can be obtained.

Of course, it is also understood that the crossflow fan may be a centrifugal fan, an axial fan, or the like. In this case, the first and second euros should be appropriately changed according to the characteristics of the fan.

The first ventilation means 131 is installed to discharge the indoor air to the outside through the first passage 114, the second ventilation means 132 to discharge the outdoor air into the interior through the second passage (115) It is preferable to install so that.

At this time, the partitioned space of the multi-window communicated with the first passage 114 is preferably disposed in the indoor side. This allows the outdoor air to be introduced into the room after being heat exchanged through the intermediate window, so that it can be insulated by the discharged indoor air. Accordingly, heat loss of the indoor space can be reduced. In addition, when it is cold, such as in winter, as the outdoor air is heat-exchanged through the window, it is possible to prevent the moisture in the air from forming on the window, thereby allowing sunlight to pass through the window well.

Of course, it is also understood that the partitioned space of the multi-window 110 communicating with the first passage 114 may be disposed outside.

The second suction unit 123 is preferably provided with a filter 130 to filter the outdoor air. This is to filter the pollutants contained in the outdoor air and to enter the indoor space.

The filter 130 is preferably manufactured in consideration of the suction power of the second ventilation means 132 and the filtering foreign matter.

In addition, grill portions 121a, 122a, and 124a are installed in the first suction part 121 and the first and second discharge parts 122 and 124, respectively. Of course, the second suction unit 123 may be provided with a grill unit.

The grill parts 121a, 122a, and 124a may be installed to fix the discharge angle of the air to be constant or to change the discharge angle of the air automatically or manually.

Such a ventilation system may be implemented to be driven by a user selecting a button or automatically determining a pollution degree of indoor air.

In addition, since the ventilation system can produce a product using the window frame and the ventilation unit as an integral unit, the ventilation system may be simply installed by fixing it to a window installation place such as a wall of a building.

The operation of the first embodiment of the ventilation system thus constructed will be described.

First, when it is determined that the indoor air is turbid, the fan motors 131a and 132a of the first and second suction units 121 and 123 are operated to rotate both the fan fans 132b and 132b.

At this time, the ventilation fan 131b of the first suction part 121 discharges the clouded indoor air to the outside through the first flow passage 114. At the same time, the ventilation fan 132b of the second suction unit 123 discharges fresh outdoor air into the room through the second flow path 115. At this time, the outside air of the second suction unit 123 is filtered while passing through the filter 123a and then discharged into the indoor space.

Accordingly, the fresh outdoor air is supplied to the indoor space, and the indoor air is ventilated by exhausting the indoor polluted air to the outside.

Second, when it is determined that fresh air should be naturally supplied to the room, only the ventilation fan 132b of the second suction part 123 is rotated. Accordingly, the fresh outside air flows into the indoor space through the second flow path 115, and relatively high pressure is formed in the indoor space where the fresh air is supplied to move the fresh air to another room such as a living room.

Third, when it is determined that the indoor space is severely contaminated by cooking, the only ventilation fan 131b of the first suction unit 121 is rotated. At this time, the heavily contaminated indoor air is discharged to the outside through the first flow path 114, a relatively low pressure is formed in the indoor space from which the polluted air is discharged, and the air is led to the ventilation system side from another room such as a living room. By discharging only indoor air in this manner, it is possible to discharge contaminated air in the room more quickly.

In this way, the indoor space can be ventilated in a predetermined ventilation mode by selectively or simultaneously operating the first ventilation means 131 and the second ventilation means 132.

Next, a second embodiment of the ventilation system according to the present invention will be described with reference to FIG. 3.

3 is a side view showing a second embodiment of the ventilation system according to the present invention.

Referring to FIG. 3, the ventilation system includes a multiple window 210, a frame 220, a ventilator, and a total heat exchanger 240.

The multiple windows 210 are installed such that at least three or more windows 211, 212, 213 are spaced apart from each other. Such multiple windows are preferably fixed to the frame so that they cannot be opened or closed. Of course, it can be understood that it can be installed in the frame to open and close the multiple window.

The frame 220 is installed to surround the edge of the multiple window 210. In such a frame, first and second flow paths 214 and 215 are formed together with the space between the multiple windows 210 by allowing the space between the multiple windows and the indoor and outdoor to communicate. In this case, the first and second flow passages are formed to intersect.

3, a first suction part 221 and a first discharge part 222 are formed to communicate with the first flow path 214, as shown in FIG. 3, and communicate with the second flow path 215. The second suction part 223 and the second discharge part 224 are formed.

At this time, the flow path between the first suction part 221 and the second discharge part 224 is formed to cross.

Alternatively, although not shown, the flow paths of the first discharge part 222 and the second suction part 223 may be formed to cross each other.

In this way, the suction discharge portion formed on one side is formed to cross.

The ventilation device may include a first ventilation unit 231 installed in the first suction unit 221 or the first discharge unit 222 and the second suction unit 223 or the second discharge unit 224. It comprises a second vent means 232 is installed.

In this case, the first ventilation means 231 is installed to discharge the indoor air to the outside through the first flow path 214, the second ventilation means 232 to the outdoor air through the second flow passage 215. It is preferable to be installed so as to discharge into the room.

The first and second ventilation means 231 and 232 include fan motors 231a and 232a and ventilation fans 231b and 232b. In this case, a cross flow fan is provided as the ventilation fan. The reason is as described above.

The partitioned space of the multi-window 210 communicating with the first passage 225 is preferably disposed at the indoor side. The reason for this is also as described above.

The second suction unit 223 is provided with a filter 223a to filter outdoor air.

In addition, grill parts 221a, 222a, and 224a are provided at the first suction part 221 and the first and second discharge parts 222 and 224. Of course, the second suction unit 223 may be provided with a grill unit. Such a grill may be implemented in the structure as described above.

The operation of the second embodiment of the ventilation system configured as described above will be described.

First, when it is determined that the air is turbid, the fan motors 231a and 232a of the first and second suction parts are operated to rotate both the fan fans 231b and 232b.

In this case, the ventilation fan 231b of the first suction part introduces the clouded indoor air into the first flow passage 214 through the heat exchanger 240, and the ventilation fan 232b of the second suction part receives fresh outdoor air. It is introduced into the total heat exchanger 240 through the second flow path (215). At this time, the outside air of the second suction unit 223 is filtered while passing through the filter 223a.

The air of the first and second flow paths 214 and 215 introduced in this way is heat-exchanged while passing through the total heat exchanger 240. Accordingly, it is possible to recover the thermal energy of the indoor air.

Subsequently, the indoor air is discharged to the outside through the first passage 214 and the first discharge unit 222, and the outdoor air is sucked into the indoor space through the second passage 215 and the second discharge unit 224. .

Second, if it is determined that fresh air should be naturally supplied to the room, only the ventilation fan 232b of the second suction part is rotated. Accordingly, the fresh outside air flows into the indoor space through the second flow path 215, and relatively high pressure is formed in the indoor space where the fresh air is supplied to move the fresh air to another room such as a living room.

Third, when it is determined that the indoor space is severely contaminated by cooking, the only side flow fan 231b of the first suction part is rotated. At this time, the heavily contaminated indoor air is discharged to the outside through the first flow path 214, a relatively low pressure is formed in the indoor space where the polluted air is discharged, and the air is led to the ventilation system side from another room such as a living room. By discharging only indoor air in this manner, it is possible to discharge contaminated air in the room more quickly.

Such a ventilation system may operate in a predetermined ventilation mode by selectively or simultaneously operating the first ventilation means 231 and the second ventilation means 232.

A third embodiment of the ventilation system according to the present invention will be described below.

First, a structure in which a ventilator is installed at two opposite sides of the frame will be described with reference to FIG. 4.

Figure 4 is a side view showing a third embodiment of the ventilation system according to the present invention.

Referring to FIG. 4, the ventilation system includes a frame 320, a ventilator, and a total heat exchanger 340.

The frame 320 is installed to surround the edge of the window 310. In this case, the window may consist of a single window or may consist of multiple windows.

At least one pair of first and second flow paths communicating indoors and outdoors is formed in the frame 320. At this time, the first and second flow paths are formed to cross.

In the frame 120, a first suction part 321 and a first discharge part 322 are formed to communicate with the first flow path, and the second suction part 323 and a second communication part communicate with the second flow path. The discharge part 324 is formed.

The ventilator is installed in the first and second flow paths so as to suck out the indoor and outdoor air.

That is, the ventilation device includes a first ventilation means 331 installed in the first flow passage and a second ventilation means 332 installed in the second flow passage.

The first and second ventilation means (331,332) is composed of a fan motor (331a, 332a) and the ventilation fans (331b, 332b). In this case, a cross flow fan is applied to the ventilation fan.

In this case, the first ventilation means 331 is installed to discharge the indoor air to the outside through the first flow path, the second ventilation means 332 is installed to discharge the outdoor air into the room through the second flow path. do.

The total heat exchanger 340 is installed to exchange heat while the indoor and outdoor air passes through the intersection of the first and second flow paths.

In the ventilation system, the first suction part 321 is formed to face the second suction part 323, and the first discharge part 322 is opposite to the second discharge part 324.

The heat exchanger 340 is installed in the flow path intersecting the first suction part 321 and the second suction part 323, and the first and second ventilation means 331 and 332 are located downstream of the air flow direction of the heat exchanger 340. ) Is installed.

That is, the first vent means 331 is installed between the total heat exchanger 340 and the first discharge unit 321, the second vent means 332 is the total heat exchanger 340 and the second discharge unit 324. Installed between).

Thus, by providing the 1st, 2nd ventilation means in the wake side, the fluidity | liquidity of air can be increased.

Of course, the first and second ventilation means may be installed upstream of the air flow direction of the total heat exchanger.

In this case, it is preferable that a filter 323a is installed at the second suction part of the second flow path to filter outdoor air.

In addition, grill parts 321a, 322a and 324a are formed in the first suction part 321 and the first and second discharge parts 322 and 324. Of course, it is also understood that the grill part may be formed in the second suction part 323. Such a grill portion may be installed in a structure as described above.

Next, a structure in which the ventilator is installed on one side of the frame will be described with reference to FIG. 5.

5 is a side view showing a modification of the ventilation system of FIG.

The ventilation system comprises a frame, a ventilator and a heat exchanger.

In the frame 120, a first suction part 421 and a first discharge part 422 are formed to communicate with the first flow path, and the second suction part 423 and the second discharge part communicate with the second flow path. A portion 424 is formed. In this case, the first and second flow paths are formed to cross each other.

The ventilation device includes a first ventilation means 431 installed in the first flow passage and a second ventilation means 432 installed in the second flow passage.

The first and second ventilation means 431 and 432 are composed of fan motors 431a and 432a and ventilation fans 431b and 432b.

The total heat exchanger 440 is installed to exchange heat while passing indoor and outdoor air through the intersections of the first and second flow paths.

Since the structure of the ventilation system is as shown in FIG. 4, a detailed description thereof will be omitted.

A fourth embodiment of the ventilation system according to the present invention will be described with reference to FIG. 6.

6 is a side view showing a fourth embodiment of the ventilation system according to the present invention.

The ventilation system comprises a frame, a ventilator and a heat exchanger.

At least one pair of first and second flow paths communicating indoors and outdoors is formed in the frame. At this time, the first and second flow paths are formed to cross.

In the frame, a first suction part 521 and a first discharge part 522 are formed to communicate with the first flow path, and the second suction part 523 and a second discharge part are formed so as to communicate with the second flow path. 524 is formed.

The ventilation device includes a first ventilation means 531 provided in the first flow passage and a second ventilation means 532 installed in the second flow passage.

The first and second ventilation means 531 and 532 are composed of fan motors 531a and 532a and ventilation fans 531b and 532b. In this case, a cross flow fan is applied to the ventilation fan.

At this time, the first vent means 531 is installed to discharge the indoor air to the outside through the first flow path, the second vent means 532 is installed to discharge the outdoor air into the room through the second flow path. do.

The total heat exchanger 540 is installed to exchange heat while passing indoor and outdoor air to the intersections of the first and second flow paths.

In the ventilation system, the second suction part 523 and the second discharge part 524 are installed to face each other as shown in FIG. Staggered on the basis of 2 euros.

In this case, a total heat exchanger 540 is formed near the second suction part 523, and a second ventilation means 532 is installed between the total heat exchanger 540 and the second discharge part 523. A first ventilation means 531 is installed between the total heat exchanger 540 and the first discharge part 521.

It is preferable that a filter 523a is installed at the second suction part 523 of the second channel to filter outdoor air.

In addition, grill parts 521a, 522a, and 524a are installed in the first suction part 521 and the first and second discharge parts 522 and 524. Of course, it is also understood that the grill part may be installed in the second suction part 523. Such a grill portion may be installed in a structure as described above.

The air intake and exhaust portion of the ventilation system, such as 6 may be installed on the upper and lower sides of the frame, or may be installed on any one side of the frame, although not shown.

Since the operation of the fourth embodiment configured as described above is almost similar to that of the third embodiment, description thereof will be omitted.

The above-described ventilation system has the following effects.

First, the ventilation system is implemented as a unit of the window frame and the ventilation unit, it can be installed in the space for installing the windows of the building wall. Therefore, it is possible to install simply, without having to drill a wall for installing the ventilation system.

Secondly, since the duct for the intake and discharge of air is formed in the window frame, the ventilation system can significantly reduce the length of the duct as compared with the prior art. In addition, it is not necessary to carry out work such as drilling a wall separately to install a duct.

Third, since the ventilation system reduces the set resistance and duct resistance of the flow air, it is necessary to reduce the pressure loss and the flow noise, and to install a fan having a small capacity by the pressure loss. Therefore, there is no need to install a separate low noise fan and sound absorbing material.

Fourth, since the ventilation system is implemented as a unit integral with the window frame, it can be operated when necessary without considering the external environment. Therefore, even when it is difficult to open a window such as during rainy weather or when there is a lot of wind, the indoor space can be ventilated whenever necessary.

Claims (25)

At least three windows installed to be spaced apart from each other; A frame installed to surround the edges of the multiple windows and allowing the partitioned space between the multiple windows to communicate with each other indoor and outdoor to form first and second flow paths together with the spaces between the multiple windows; And, And a ventilation device installed in the frame and configured to discharge indoor and outdoor air to the outside of the room through the first flow path and the second flow path. The method of claim 1, In the frame, A first suction part and a first discharge part are formed to communicate with the first flow path, And a second suction part and a second discharge part are formed to communicate with the second channel. The method of claim 2, The ventilator is: First ventilation means installed on the first suction part or the first discharge part; And, And a second ventilation means installed in the second suction part or the second discharge part. The method of claim 3, The first vent means is installed to discharge the indoor air to the outside through the first passage, The second vent means is installed so as to discharge the outdoor air into the room through the second passage. The method of claim 4, wherein And the partitioned space of the multi-window communicating with the first flow passage is arranged on the indoor side. The method of claim 4, wherein Ventilation system, characterized in that the second suction portion is installed to filter the outdoor air. The method of claim 6, Ventilation system, characterized in that the grill portion is provided in the first suction portion and the first and second discharge portion. At least three windows installed to be spaced apart from each other; It is installed to surround the edge of the multi-window, so that the partitioned space between the multi-window and the interior and exterior communicate with each other to form the first and second flow paths with the space between the multiple windows, the first and second flow paths to cross A frame formed; A ventilation device installed in the frame and discharging indoor and outdoor air to the outside and the outside through the first and second flow paths; And, And a total heat exchanger installed at a portion where the first and second flow paths of the frame cross each other to allow the air sucked through the first and second flow paths to exchange heat. The method of claim 8, In the frame, A first suction part and a first discharge part are formed to communicate with the first flow path, A second suction part and a second discharge part are formed to communicate with the second flow path, And the flow paths of the first suction part and the second discharge part cross each other. The method of claim 8, In the frame, A first suction part and a first discharge part are formed to communicate with the first flow path, A second suction part and a second discharge part are formed to communicate with the second flow path, Ventilation system, characterized in that the flow path of the first discharge portion and the second suction portion is formed to cross. The method of claim 9 or 10, The ventilator is: First ventilation means installed on the first suction part or the first discharge part; And, And a second ventilation means installed in the second suction part or the second discharge part. The method of claim 11, The first vent means is installed to discharge the indoor air to the outside through the first passage, The second vent means is installed so as to discharge the outdoor air into the room through the second passage. The method of claim 12, And the partitioned space of the multi-window communicating with the first flow passage is arranged on the indoor side. The method of claim 13, Ventilation system, characterized in that the second suction portion is installed to filter the outdoor air. The method of claim 14, Ventilation system, characterized in that the grill portion is provided in the first suction portion and the first and second discharge portion. delete delete delete delete delete delete delete delete delete delete

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