Ventilation apparatus

Abstract

A ventilation apparatus according to an embodiment of the present invention includes: a housing; a duct flange including an indoor air inflow flange coupled to one side edge of one side surface of the housing, an outdoor air discharge flange coupled to the other side edge of the one side surface, an outdoor air inflow flange which is coupled to one side edge of the other side surface corresponding to the opposite side of the one side surface and is located on the opposite side of the indoor air inflow flange, and an indoor air discharge flange which is coupled to the other side edge of the other side surface and is located on the opposite side of the outdoor air discharge flange; a heat transfer element that is arranged inside the housing and through which indoor air entering through the indoor air inflow flange and outdoor air entering through the outdoor air inflow flange pass while crossing each other; a suction fan that sucks in outdoor air and supplies it to indoors; an exhaust fan that sucks in indoor air and discharges it to outdoors; and a heat exchanger arranged at a point adjacent to a suction hole in the suction fan, wherein a bypass kit coupled to a first side surface of the heat transfer element corresponding to an outlet surface for outdoor air passing through the heat transfer element is included, and the bypass kit has formed alternating with each other therein: an indoor air passage through which, flows indoor air sucked in through the indoor air inflow flange and bypassing the heat transfer element; and an outdoor air passage through which indoor air passing through the heat transfer element flows.

Description

ventilation device

[0001] The present invention relates to a ventilation device.

[0002] A ventilation device is a device that discharges indoor air to the outside and supplies fresh outdoor air to the inside, and its main component is a heat transfer element that allows only heat exchange without mixing the discharged indoor air and the incoming outdoor air.

[0003] The prior art below discloses a ventilation device having a bypass path that allows incoming outdoor air to bypass the heating element and be supplied to the room.

[0004] In the above prior art, not only are heating and cooling components not installed, but there is also no bypass path to allow indoor air exhausted from the indoors to bypass the heating element. Consequently, foreign substances or grease generated during indoor cooking are inevitably discharged through the heating element and into the outdoors, resulting in the inability to prevent contamination of the heating element.

[0005] Prior art literature: Korean Patent No. 1638065 (July 4, 2016)

[0006] The present invention is proposed to improve the above problems.

[0007] According to an embodiment of the present invention for achieving the above object, a ventilation device comprises: a housing; a duct flange including an air intake flange coupled to one edge of one side of the housing, an outdoor air discharge flange coupled to the other edge of the one side, an outdoor air intake flange coupled to one edge of the other side opposite to the one side and positioned opposite the indoor air intake flange, and an outdoor air discharge flange coupled to the other edge of the other side and positioned opposite the outdoor air discharge flange; a heating element disposed inside the housing, through which indoor air introduced through the indoor air intake flange and outdoor air introduced through the outdoor air intake flange intersect and pass; a suction fan for sucking outdoor air and supplying it indoors; an exhaust fan for sucking indoor air and discharging it outdoors; And a ventilation device including a heat exchanger arranged at a point adjacent to an intake port of the suction fan, and including a bypass kit coupled to a first side of the heating element corresponding to an outlet surface of outdoor air passing through the heating element, wherein the bypass kit is characterized in that an indoor air passage through which indoor air is sucked in through the inlet flange and flows while bypassing the heating element, and an outdoor air passage through which indoor air passing through the heating element flows are formed alternately.

[0008] The above bypass kit is coupled to one side of the heating element and includes a rear side where a main inlet is formed, a front side defined opposite the rear side where a main outlet is formed, a first side where a bypass inlet is formed, and a second side where a bypass outlet is formed, wherein the outdoor air passage is a passage connecting the main inlet and the main outlet, and the indoor air passage is a passage connecting the bypass inlet and the bypass outlet.

[0009] The above outdoor air passage and the above indoor air passage are formed alternately in the height direction of the bypass kit and are characterized in that they are formed in a direction perpendicular to each other.

[0010] A flow guide surface is formed between adjacent main inlets and between adjacent bypass inlets, and the upper and lower edges of the flow guide surface are rounded to a predetermined curvature.

[0011] The boundary surface of the outdoor air passage and the indoor air passage is characterized by forming an insulating surface.

[0012] The above bypass kit is characterized in that it is separable from the above heating element.

[0013] The interior of the housing is partitioned into a plurality of spaces, and the plurality of spaces include an indoor air inlet space that guides indoor air introduced into the indoor air inlet flange to a second side of the heating element, a switching space that guides indoor air introduced into the indoor air inlet flange toward the heat exchanger, an outdoor air inlet space that guides outdoor air introduced into the outdoor air inlet flange to a third side of the heating element, an indoor air discharge space that communicates with a fourth side of the heating element, a switching space defined at an outlet of the switching passage and a main outlet of the bypass kit, and an outdoor air supply space in which air introduced into the switching space and then passing through the heat exchanger is collected, wherein the first side and the third side of the heating element are defined opposite each other, and the second side and the fourth side of the heating element are defined opposite each other, and the suction fan is disposed in the outdoor air supply space, and the exhaust fan is disposed in the indoor air discharge space.

[0014] The ventilation device further includes a first damper that selectively opens and closes an inlet of the switching path and an inlet of the indoor inflow space so that indoor air flowing through the indoor inflow flange flows only to one side of the switching path and the indoor inflow space, and a second damper that selectively opens and closes an outlet of the switching path and the bypass inlet so that indoor air flowing along the switching path flows only to one side of the switching space or the bypass kit.

[0015] The heat exchanger is characterized in that it is arranged between the switching space and the outdoor air supply space, and indoor air or outdoor air guided to the switching space passes through the heat exchanger and is guided to the outdoor air supply space.

[0016] The ventilation device further includes a blocking wall that divides the internal exhaust space and the external air supply space, and an exhaust guide that penetrates the blocking wall and is connected to the outlet of the exhaust fan, and the exhaust guide is characterized in that it passes through the external air supply space and is connected to the internal exhaust flange.

[0017] According to the ventilation device according to the embodiment of the present invention having the above configuration, the following effects can be obtained.

[0018] First, since indoor air bypasses the heating element and is exhausted outdoors, contamination of the heating element can be minimized.

[0019] Second, since the bypass kit is provided in a form that adheres closely to the side of the heating element, the length of the bypass path is shortened, thereby minimizing flow resistance.

[0020] Third, as the length of the bypass path is shortened, the length of the heat exchanger installed inside the housing increases, thereby improving the heating and cooling performance.

[0021] FIG. 1 is a left side perspective view of a ventilation device equipped with a bypass kit according to an embodiment of the present invention.

[0022] Figure 2 is a right side perspective view of the ventilation device.

[0023] FIG. 3 is a front perspective view showing a bypass kit according to an embodiment of the present invention coupled to one side of an air purification unit.

[0024] Figure 4 is a rear perspective view of the air purification unit.

[0025] Figure 5 is a perspective view of a bypass kit provided in a ventilation device according to an embodiment of the present invention.

[0026] Figure 6 is a bottom view of a ventilation device equipped with a bypass kit according to an embodiment of the present invention.

[0027] Hereinafter, a ventilation device according to an embodiment of the present invention will be described in detail with reference to the drawings.

[0028] FIG. 1 is a left-side perspective view of a ventilation device equipped with a bypass kit according to an embodiment of the present invention, and FIG. 2 is a right-side perspective view of the ventilation device.

[0029] Referring to FIGS. 1 and 2, a ventilation device (10) according to an embodiment of the present invention includes a frame (11), a case (12) provided inside the frame (11), and components for ventilation and heating and cooling provided inside the case (12).

[0030] In detail, through holes through which indoor air and outdoor air pass are formed on two opposing sides of the frame (11), and a duct flange (13) is connected to the through holes.

[0031] The above duct flange (133) includes an outdoor air intake flange (131) for outdoor air intake, an indoor air discharge flange (132) for indoor air discharge, an indoor air intake flange (133) for indoor air intake, and an outdoor air discharge flange (134) for outdoor air supply.

[0032] As shown, the outside air inlet flange (131) and the inside air discharge flange (132) face outdoors, and the inside air inlet flange (133) and the outside air discharge flange (134) are exposed indoors.

[0033] In addition, the case (12) may include an upper case and a lower case (122), and may be formed as a single part. In FIGS. 1 and 2, the ventilation device (10) is shown in an upside-down state, and when actually installed on the ceiling, the lower case (122) is installed so that it faces downward.

[0034] The combination of the above frame (11) and the above case (12) can be defined as a housing.

[0035] The components for the above ventilation and heating and cooling include an air purification unit including a heating element (17) and a filter module (18), a bypass kit (20) installed on one side of the air purification unit, an intake fan (15) that sucks in outdoor air and supplies it to the room, an exhaust fan (16) that sucks in indoor air and discharges it to the room, a heat exchanger (14) that cools or heats the sucked outdoor air, and an exhaust guide (19) that connects the outlet of the exhaust fan (16) and the exhaust flange (132) of the exhaust fan.

[0036] In addition, the ventilation device (10) further includes a first damper (20) that selectively guides indoor air introduced through the inlet flange (133) toward the heating element (17), and a second damper (21) that selectively opens and closes a path so that indoor air flows toward either the heat exchanger (14) or the bypass kit (20).

[0037] In the heat exchanger ventilation mode, the outdoor air sucked in through the outdoor air intake flange (131) passes through the filter module (18) and the heat exchanger (17), then passes through the bypass kit (20) and is introduced into the suction fan (14). Then, the outdoor air is supplied from the suction fan (14) to the indoor space through the outdoor air discharge flange (134). At this time, the outdoor air passing through the bypass kit (20) can be supplied to the indoor space after being cooled or heated while passing through the heat exchanger (12).

[0038] In addition, indoor air sucked through the above-mentioned intake flange (133) passes through the above-mentioned heating element (17) and is guided to the above-mentioned exhaust fan (16), and is discharged to the outdoors through the above-mentioned exhaust fan (16), the above-mentioned exhaust guide (19), and the above-mentioned exhaust flange (132).

[0039] FIG. 3 is a front perspective view showing a bypass kit according to an embodiment of the present invention coupled to one side of an air purification unit, and FIG. 4 is a rear perspective view of the air purification unit.

[0040] Referring to FIGS. 3 and 4, the bypass kit (20) can be coupled to a side of the heating element (17) from which outdoor air is discharged among the four sides. Accordingly, outdoor air sucked into the ventilation device (10) passes sequentially through the heating element (17) and the bypass kit (20).

[0041] A sealing member (23) is provided on the side of the heating element (17) on which the bypass kit (20) is mounted, so that outdoor air passing through the heating element (17) does not leak between the heating element (17) and the bypass kit (20). To this end, the sealing member (23) may be formed in a rectangular band shape that surrounds the edge of the inlet side of the bypass kit (20).

[0042] Below, the above bypass kit is described in detail with reference to the drawings.

[0043] FIG. 5 is a perspective view of a bypass kit provided in a ventilation device according to an embodiment of the present invention.

[0044] Referring to FIG. 5, a bypass kit (20) according to an embodiment of the present invention includes front and rear portions having a size corresponding to the size of a side from which outdoor air is discharged among the four sides of the heating element (17), left and right side portions connecting the left and right edges of the front and rear portions, and upper and lower side portions connecting the upper and lower edges of the front and rear portions.

[0045] In detail, the bypass kit (20) includes a rear surface that is in close contact with the side of the heating element (17) through which outdoor air is discharged, a front surface that is the opposite side of the rear surface, a first side through which indoor air bypassing the heating element (17) is introduced by being introduced through the inlet flange (133), a second side that is the opposite side of the first side, and upper and lower surfaces that connect the upper and lower ends of the first and second sides, respectively.

[0046] Inside the above bypass kit (20), an indoor air passage (206) and an outdoor air passage (205) are formed alternately in the vertical direction. The indoor air passage (206) and the outdoor air passage (205) are formed in directions perpendicular to each other. The inlet of the outdoor air passage (205) is defined as a main inlet (201), and the inlet of the indoor air passage (206) is defined as a bypass inlet (202). It is natural that a main outlet is formed on the opposite side of the main inlet (201), and a bypass outlet is formed on the opposite side of the bypass inlet (202).

[0047] And, the main inlet (201) is formed at the rear of the bypass kit (20), and the bypass inlet (202) is formed at the first side of the bypass kit (20). That is, the outdoor air passage (205) can be described as a wide but short passage, and the indoor air passage (206) can be described as a narrow but long passage. The heights of the outdoor air passage (206) and the indoor air passage (205) can be designed to be the same.

[0048] A flow guide surface (204) is formed between the inlets of adjacent indoor air passageways (206), and the flow guide surface (204) forms one side of the outdoor air passageway (205). In addition, a flow guide surface (203) is also formed between the inlets of adjacent outdoor air passageways (205), and the flow guide surface (203) forms one side of the indoor air passageway (206).

[0049] The upper and lower edges of the above flow guide surfaces (203, 204) are formed to be rounded with a predetermined curvature, so that the flow resistance that occurs when the air hitting the flow guide surfaces (203, 204) is divided in the upper and lower directions and then flows into the main inlet (201) or the bypass inlet (202) can be minimized.

[0050] Unlike the heating element (17), the above bypass kit (20) hardly exchanges heat between indoor air and outdoor air. That is, the boundary between the outdoor air passage (205) and the indoor air passage (106) is formed by an insulating wall, so it can be seen that even if indoor air and outdoor air intersect, hardly any heat exchange occurs.

[0051] Meanwhile, the bypass kit (20) is detachable while the ventilation device (10) is installed, such as the heating element (17) or filter module (18). In addition, the bypass kit (20) is made of a material that can be washed with water, so it can be periodically separated and washed.

[0052] Figure 6 is a bottom view of a ventilation device equipped with a bypass kit according to an embodiment of the present invention.

[0053] Referring to Fig. 6, the interior of the ventilation device (10) is divided into a plurality of spaces, and the plurality of spaces are defined as spaces through which indoor air or outdoor air flows.

[0054] In detail, the above-described multiple spaces include an air intake space (101) that guides indoor air introduced into the interior of the ventilation device (10) through the air intake plan (133) to the heat transfer element, and a switching path (106) that guides indoor air introduced into the interior of the ventilation device (10) toward the heat exchanger (14) or the bypass kit (20).

[0055] The first damper (121) is installed at a point where the inside inflow space (101) and the switching passage (106) intersect, and selectively opens and closes the inlet of the inside inflow space (101) and the inlet of the switching passage (106). For example, when the first damper (121) rotates, it opens the inlet of the inside inflow space (101) and simultaneously closes the inlet of the switching passage (106), and conversely, it closes the inlet of the inside inflow space (101) and simultaneously opens the inlet of the switching passage (106).

[0056] The above switching path (106) extends along the side of the ventilation device (10) where the inside inlet flange (133) and the outside air discharge flange (134) are mounted.

[0057] The above-mentioned air inflow space (101) communicates with the heating element (17), allowing the inflowing indoor air to pass through the heating element (17).

[0058] The above multiple spaces further include a switching space (105) formed on the outlet side of the switching passage (106).

[0059] The boundary line of the above switching space (105) is drawn along the side of the ventilation device (10), the outlet of the switching passage (106), the heat exchanger (14), and the outlet of the bypass kit (20). Accordingly, indoor air flowing along the switching passage (106) or outdoor air passing through the bypass kit (20) is guided to the switching space (105).

[0060] And, the second damper (22) is arranged on the outlet side of the switching passage (106) so that the indoor air guided to the switching passage (106) flows to either the bypass kit (20) or the switching space (105).

[0061] In addition, a barrier wall (303) is formed between the first side of the bypass kit (20) and the wall forming the switching passage (106), so as to prevent indoor air guided to the bypass kit (20) from leaking into the switching space (105).

[0062] The above multiple spaces further include an outside air inflow space (103) that guides outside air introduced through the outside air inflow flange (131) to the filter module (18).

[0063] In detail, the outdoor air flowing into the outdoor air inflow space (103) sequentially passes through the filter module (18), the heating element (18), and the bypass kit (20).

[0064] The above-mentioned plurality of spaces further include a discharge space (102) formed on the outlet side of the heating element (17) opposite to the inlet space (101).

[0065] In detail, a blocking wall (302) is formed between the second side of the bypass kit (20) and the side of the ventilation device (10), so as to prevent air guided to the exhaust space (102) from leaking into another space.

[0066] The boundary line of the above-mentioned exhaust space (102) is drawn along the side of the air purification unit, the second side of the bypass kit (20), the blocking wall (301), and the side of the ventilation device (10). In addition, the exhaust fan (16) is installed in the above-mentioned exhaust space (102), a through hole is formed in the above-mentioned blocking wall (301), and the outlet of the exhaust fan (16) and the inlet of the exhaust guide (19) are connected to the through hole. Therefore, indoor air guided to the above-mentioned exhaust space (102) is discharged to the outdoors through the exhaust fan (16), the exhaust guide (19), and the above-mentioned exhaust flange (132).

[0067] The above multiple spaces further include an external air supply space (104).

[0068] The above-mentioned outdoor air supply space (104) is described as a space where indoor air or outdoor air guided to the switching space (105) remains before being supplied indoors. The above-mentioned outdoor air supply space (104) is provided with the above-mentioned suction fan (15), and the above-mentioned heat exchanger (14) separates the above-mentioned outdoor air supply space (104) from the above-mentioned switching space (105). In addition, the air guided to the above-mentioned switching space (105) passes through the above-mentioned heat exchanger (14) and is guided to the above-mentioned outdoor air supply space (104).

[0069] A blocking wall (302) is installed between one side end of the heat exchanger (14) and the side of the ventilation device (10), and the other side end of the heat exchanger (14) is in close contact with the blocking wall (301), so that air guided to the switching space (105) must pass through the heat exchanger (14).

[0070] In addition, since the above-mentioned external air supply space (104) and the above-mentioned internal air discharge space (102) are partitioned by the above-mentioned blocking wall (301), the air in the internal air discharge space (102) does not leak into the above-mentioned external air supply space (104).

[0071] Below, the flow of indoor and outdoor air according to the driving mode is described.

[0072] First, let's explain the heat exchange ventilation mode.

[0073] When the heat exchanger mode is selected, the outdoor air flows along arrow d, and the indoor air flows along arrow a.

[0074] In detail, in the heat transfer ventilation mode, the first damper (21) rotates to open the inlet of the indoor air inlet space (101). Then, indoor air flowing into the indoor air inlet flange (133) sequentially passes through the indoor air inlet space (101), the heat transfer element 917), the indoor air discharge space (102), the exhaust fan (16), the exhaust guide (19), and the indoor air discharge flange (132) and is discharged to the outdoors.

[0075] In addition, the outdoor air flowing into the outdoor air inlet flange (131) sequentially passes through the outdoor air inlet space (103), the filter module (18), the heat transfer element (17), the bypass kit (20), the switching space (105), the heat exchanger (14), the suction fan (15), and the outdoor air discharge flange (134) and is supplied to the room.

[0076] In this state, when the heat exchanger (14) operates as an evaporator, ventilation and cooling are performed simultaneously, and the system can be used primarily in the summer. Conversely, when the heat exchanger (14) operates as a condenser, ventilation and heating are performed simultaneously, and the system can be used primarily in the winter.

[0077] Second, the rapid ventilation mode is explained.

[0078] Rapid ventilation mode is selected when it is necessary to quickly exhaust indoor air to the outdoors by bypassing the heating element (17).

[0079] When the rapid ventilation mode is selected, the first damper (21) operates to open the inlet of the switching path (106) and close the inlet of the indoor air inflow space (101). At the same time, the second damper (22) operates to close the outlet of the switching path (106) so that indoor air is guided to the bypass inlet (202) of the bypass kit (20). That is, indoor air flowing into the indoor air inflow flange (133) flows along arrow b.

[0080] Therefore, in the rapid ventilation mode, indoor air is discharged to the outdoors through the switching path (106), bypass kit (20), exhaust outlet space (202), exhaust fan (16), exhaust guy (19), and exhaust outlet flange (132).

[0081] When cooking fish or grilling meat indoors, the rapid ventilation mode may be selected to prevent animal fat from sticking to the inner wall of the heating element.

[0082] In rapid ventilation mode, outdoor air flows along arrow d, which is the same as in the heat exchange mode. At this time, when outdoor air and indoor air pass through the bypass kit (20), there is almost no heat exchange.

[0083] Additionally, the heat exchanger (14) can be kept stationary depending on the season or can operate as an evaporator or condenser.

[0084] Third, the rapid cooling mode is explained.

[0085] When rapid cooling mode is selected, indoor air flows along arrow c and outdoor air flows along arrow d.

[0086] To this end, the first damper (21) and the second damper (22) open both the inlet and outlet of the switching passage (106). Accordingly, indoor air flowing in through the internal inlet flange (133) sequentially passes through the switching passage (106), the switching space (105), and the heat exchanger (14) and is guided to the outside air supply space (104).

[0087] And, the outdoor air sequentially passes through the outdoor air inlet space (103), filter module (18), heating element (17), bypass kit (20), switching space (105), and heat exchanger (14) and is guided to the outdoor air supply space (104). And, the outdoor air and indoor air guided to the outdoor air supply space (104) are supplied to the room by the suction fan (15).

[0088] Here, a damper may be installed at the outdoor air inlet connected to the outdoor air inlet flange (131) to block the inflow of outdoor air in the rapid cooling mode. When the rapid cooling mode is selected in the summer, the outdoor air is hotter than the indoor air, so the indoor air and outdoor air are mixed in the switching space (105) and become higher than the indoor temperature. This may reduce the rapid cooling effect, so in the rapid cooling mode, the inflow of outdoor air is blocked so that the indoor temperature can be quickly lowered only by the circulation of indoor air.

[0089] Meanwhile, in winter, a rapid heating mode can be selected, and when the rapid heating mode is selected, while the heat exchanger (14) operates as a condenser, outdoor air with a low temperature can be prevented from flowing into the room.

Claims

1. Housing; A duct flange including an air inlet flange coupled to one edge of one side of the housing, an air outlet flange coupled to the other edge of the one side, an air inlet flange coupled to one edge of the other side opposite to the one side and positioned opposite the air inlet flange, and an air outlet flange coupled to the other edge of the other side and positioned opposite the air outlet flange; A heating element disposed inside the housing, through which indoor air introduced through the indoor inlet flange and outdoor air introduced through the outdoor air inlet flange pass intersectingly; A suction fan that draws in outdoor air and supplies it indoors; An exhaust fan that draws in indoor air and discharges it outdoors; and In a ventilation device including a heat exchanger positioned adjacent to the suction inlet of the above suction fan, A bypass kit is included which is coupled to a first side of the heating element corresponding to the outlet surface of the outdoor air passing through the heating element, The above bypass kit includes: A ventilation device characterized in that an indoor air passage through which indoor air is sucked in through the above-mentioned intake flange and flows while bypassing the above-mentioned heating element, and an outdoor air passage through which indoor air passes through the above-mentioned heating element flow are formed alternately.

2. In paragraph 1, The above bypass kit, A rear surface coupled to one side of the above heating element and forming a main inlet; Defined as the opposite side of the above rear, the front where the main exit is formed, The first side where the bypass inlet is formed, Including a second side in which a bypass outlet is formed, The above outdoor air passage is a passage connecting the main inlet and the main outlet, A ventilation device, characterized in that the indoor air passage is a passage connecting the bypass inlet and the bypass outlet.

3. In paragraph 2, A ventilation device characterized in that the outdoor air passage and the indoor air passage are formed alternately in the height direction of the bypass kit and are formed in a direction orthogonal to each other.

4. In paragraph 3, A flow guide surface is formed between adjacent main inlets and between adjacent bypass inlets, respectively. A ventilation device characterized in that the upper and lower edges of the above-mentioned flow guide surface are rounded at a predetermined curvature.

5. In paragraph 4, A ventilation device characterized in that the boundary between the outdoor air passage and the indoor air passage forms an insulating surface.

6. In paragraph 1, A ventilation device, wherein the bypass kit is separable from the heating element.

7. In paragraph 2, The interior of the above housing is divided into a number of spaces, The above multiple spaces are, An inlet space for guiding indoor air flowing into the above inlet flange to the second side of the heating element, A switching space that guides indoor air flowing into the above-mentioned betting inlet flange toward the above-mentioned heat exchanger, An outdoor air inlet space that guides outdoor air introduced through the outdoor air inlet flange to the third side of the heating element, A discharge space communicating with the fourth side of the above heating element, A switching space defined at the outlet of the above switching euro and the main outlet of the above bypass kit, Including an outside air supply space where air passing through the heat exchanger is collected after being guided to the above switching space, The first side and the third side of the above heating element are defined opposite each other, The second side and the fourth side of the above heating element are defined opposite each other, The above suction fan is placed in the outside air supply space, A ventilation device characterized in that the above exhaust fan is placed in the exhaust space.

8. In paragraph 7, A first damper that selectively opens and closes the inlet of the switching path and the inlet of the inside inlet space so that indoor air introduced through the above-mentioned inlet flange flows only to one side of the switching path and the inside inlet space, A ventilation device further comprising a second damper that selectively opens and closes an outlet of the switching path and an inlet of the bypass so that indoor air flowing along the switching path flows only to one side of the switching space or the bypass kit.

9. In paragraph 7, A ventilation device characterized in that the heat exchanger is arranged between the switching space and the outdoor air supply space, and indoor air or outdoor air guided to the switching space passes through the heat exchanger and is guided to the outdoor air supply space.

10. In paragraph 7, A barrier wall dividing the above-mentioned air discharge space and the above-mentioned outside air supply space, Further comprising an exhaust guide penetrating the above barrier and connected to the outlet of the exhaust fan, A ventilation device characterized in that the exhaust guide passes through the outside air supply space and is connected to the inside exhaust flange.

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