Ventilation apparatus

Abstract

The ventilation apparatus according to an embodiment of the present invention comprises: a housing having an external air inlet and an internal air outlet formed on one side surface thereof and an internal air inlet and an external air outlet formed on the other side surface thereof, that faces the one side surface; an air purification module accommodated inside the housing and comprising a heat transfer element; an evaporator disposed between the air purification module and the external air outlet; a drain pan installed below the evaporator and receiving the evaporate generated by the evaporator; a suction fan module disposed inside the housing and having an outlet that is connected to the external air outlet; a discharge fan module disposed inside the housing and having an outlet connected to the internal air outlet; and an extension duct connecting the outlet of the suction fan module and the external air outlet.

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] Recently, hybrid ventilation devices that can perform heating and cooling functions in addition to the ventilation function through heat exchange have appeared.

[0004] Specifically, as disclosed in FIG. 5 of the prior art below, a refrigerant cycle is installed within the ventilation device to perform cooling and heating functions. As an example, in the prior art, a condenser is placed on an indoor air discharge path, an evaporator is placed on an outdoor air supply path, and a four-way valve is connected to the compressor outlet side to switch the flow of refrigerant depending on the cooling mode and heating mode.

[0005] According to the ventilation device structure disclosed in the above prior art, the outlet of the intake fan module for sucking outdoor air or the exhaust fan module for sucking indoor air is in close contact with the side of the ventilation device case.

[0006] In particular, the outlet of the suction fan module is directly connected to the inlet of the duct flange, which is connected to the external side of the ventilation device case, and the outlet area of ​​the suction fan module is smaller than the inlet area of ​​the duct flange. Therefore, the discharge area of ​​the air at the outlet of the suction fan module increases rapidly, which may cause a vortex phenomenon at the edge of the outlet of the suction fan module. This vortex phenomenon acts as airflow resistance, which may cause flow loss and become a cause of flow noise.

[0007] In addition, since the fan module is pressed against the side of the ventilation device case, the air passing through the heat exchanger may not pass evenly across the entire area of ​​the evaporator or condenser, but may pass concentratedly only through the area near the intake of the fan module.

[0008] Prior art: Patent Publication No. 10-2021-0115565 (September 27, 2021)

[0009] The present invention is proposed to improve the above problems.

[0010] In order to achieve the above object, a ventilation device according to an embodiment of the present invention comprises: a housing having an outside air inlet and an inside air outlet formed on one side thereof, and an inside air inlet and an outside air outlet formed on the other side facing the one side thereof; an air purification module accommodated inside the housing and including a heating element; an evaporator disposed between the air purification module and the outside air outlet; a drain pan positioned below the evaporator and configured to receive condensate generated in the evaporator; a suction fan module disposed inside the housing and having an outlet connected to the outside air outlet; an exhaust fan module disposed inside the housing and having an outlet connected to the inside air outlet; and an extension duct connecting the outlet of the suction fan module and the outside air outlet.

[0011] The above extension duct includes a duct body having an inlet and an outlet formed at each end thereof, a fan shoulder extending along an edge of the inlet in a direction intersecting the extension direction of the duct body and coupled to an outlet of the suction fan module; and a flange shoulder extending along an edge of the outlet in a direction intersecting the extension direction of the duct body and coupled to a side surface of the housing in which the outside air outlet is formed, wherein the duct body is characterized in that its cross-sectional area increases from the inlet toward the outlet.

[0012] The above inlet is formed in the same shape as the outlet of the above suction fan module, and the above outlet is formed in a polygonal shape, characterized in that the polygonal shape is formed by connecting the tangents of the outside air discharge ports.

[0013] The above suction fan module includes a fan housing having a fan accommodated therein, the fan housing including: an intake port; a flow guide including a curved portion that is rounded along the intake port on the outside of the intake port and a straight portion that extends from an end of the curved portion; and a cut-off portion that extends parallel to the straight portion from a starting point of the curved portion, and an outlet of the suction fan module includes an outer end defining an end of the straight portion, an inner end defining an end of the cut-off portion, and side ends connecting both ends of the outer end and both ends of the inner end, respectively.

[0014] The inlet of the above duct body is characterized by having the same shape as the outlet of the above suction fan module.

[0015] The duct body includes an upper portion extending from the upper end of the inlet to the outlet and extending in the same line as the straight portion; a lower portion extending from the lower end of the inlet to the outlet and extending in a direction away from the upper portion as it goes toward the outlet; left and right extensions extending from the left and right sides of the inlet to the outlet and extending in a direction away from each other as it goes toward the outlet; and left and right tapered portions extending from the left and right edges of the upper portion to the outlet, respectively, and each of the left and right tapered portions is characterized in that the length of the end defining the outlet is formed longer than the length of the end on the inlet side.

[0016] It further includes left and right chamfered portions extending from the boundary point where the left and right edges of the left and right extensions and the lower portion meet to the outlet, and the starting point of each of the left and right chamfered portions is located at a point spaced apart from the inlet toward the outlet.

[0017] The upper surface and the left and right chamfered portions are characterized in that they extend parallel to each other.

[0018] The above polygon is characterized in that it is an octagon formed by connecting the ends of the upper surface, lower surface, left and right extended portions, left and right tapered portions, and left and right chamfered portions.

[0019] The above duct body further includes a duct neck extending from an edge of the inlet, and is characterized in that at least the upper surface portion, the lower surface portion, and the left and right extension portions extend from an end portion of the duct neck.

[0020] The above left and right tapered portions are characterized in that they extend from the upper left and right corners of the inlet.

[0021] The upper left and right corners of the above inlet are characterized by being formed to be tapered.

[0022] As an example, the angle of inclination formed by the upper surface and the lower surface is characterized by being within the range of 17 to 21 degrees.

[0023] As another example, the angle of inclination formed by the upper surface and the lower surface is characterized by being within the range of 18 to 20 degrees.

[0024] As another example, the angle of inclination formed by the upper surface and the lower surface is characterized by being 19 degrees.

[0025] According to the ventilation device according to the embodiment of the present invention having the above configuration, an extension duct is interposed between the outlet of the suction fan module and the inlet of the outside air discharge flange, so that the air flow path between the outlet of the suction fan module and the outside air discharge flange is gradually expanded, thereby significantly reducing the possibility of occurrence of a vortex phenomenon or noise.

[0026] Additionally, rapid cooling mode has the effect of increasing the heat exchange area of ​​the evaporator. As the heat exchange area of ​​the evaporator increases, its heat exchange capacity increases, thus ensuring sufficient heat exchange performance.

[0027] Figure 1 is a bottom perspective view of a ventilation device according to an embodiment of the present invention.

[0028] Figure 2 is an exploded perspective view of the ventilation device.

[0029] Figure 3 is a bottom view showing the internal configuration of the ventilation device.

[0030] Figure 4 is a cross-sectional perspective view of a ventilation device taken along line 4-4 of Figure 1.

[0031] Figure 5 is a bottom perspective view of a main case constituting a ventilation device according to an embodiment of the present invention.

[0032] Figure 6 is a bottom perspective view of a middle case constituting a main case of a ventilation device according to an embodiment of the present invention.

[0033] Figure 7 is a plan perspective view of the middle case.

[0034] Figure 8 is a bottom perspective view of an upper case constituting a main case of a ventilation device according to an embodiment of the present invention.

[0035] Figure 9 is a bottom view of the main case.

[0036] Figure 10 is a drawing showing the lower case separated from the bottom of the main case.

[0037] Fig. 11 is a perspective view of the bottom of the lower case.

[0038] Figure 12 is a bottom perspective view of a drain pan coupled to a lower case of a ventilation device according to an embodiment of the present invention.

[0039] Fig. 13 is a plan perspective view of the above drain pan.

[0040] Figure 14 is a plan view of a ventilation device equipped with a connecting duct to increase air volume and secure evaporator performance.

[0041] Figure 15 is a side view showing an extension duct attached to the fan housing of the suction fan module.

[0042] Fig. 16 is a bottom perspective view of an extension duct according to an embodiment of the present invention.

[0043] Figure 17 is a plan perspective view of the above extension duct.

[0044] Figure 18 is a longitudinal cross-sectional view of an extension duct cut along line 18-18 of Figure 16.

[0045] Fig. 19 is a cross-sectional cutaway perspective view of an extension duct cut along line 19-19 of Fig. 16.

[0046] Figure 20 is a cross-sectional cutaway perspective view of an extension duct cut along 20-20 of Figure 16.

[0047] Fig. 21 is a cross-sectional perspective view of an extension duct cut along 21-21 of Fig. 17.

[0048] Fig. 22 is a cross-sectional perspective view of an extension duct cut along 22-22 of Fig. 17.

[0049] Hereinafter, a ventilation device according to an embodiment of the present invention will be described in detail with reference to the drawings.

[0050] FIG. 1 is a bottom perspective view of a ventilation device according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of the ventilation device, FIG. 3 is a bottom view showing the internal configuration of the ventilation device, and FIG. 4 is a cross-sectional perspective view of the ventilation device taken along line 4-4 of FIG. 1.

[0051] Referring to FIGS. 1 to 4, the ventilation device (10) according to the embodiment of the present invention is mainly installed on the ceiling, so that the user mainly recognizes the bottom surface of the ventilation device (10).

[0052] And, as shown in Fig. 1, the user can open the cover provided on the bottom of the ventilation device (10) to separate or replace the air purification module.

[0053] In detail, a ventilation device (10) according to an embodiment of the present invention includes a hexahedral housing (11) having an outer shape and an open bottom surface, a shield cover (16) covering the opened bottom surface of the housing (11), and a plurality of duct flanges (17) each mounted on two opposing side surfaces of the housing (11).

[0054] An outdoor air inlet (101) and an indoor air outlet (104) are formed at both ends of one side of the housing (11), respectively. In addition, an indoor air inlet (103) and an outdoor air outlet (102) are formed at both ends of the other side of the housing (11) facing the one side, respectively.

[0055] And, the external air inlet (101) and the internal air inlet (103) are formed at positions facing each other, and the internal air outlet (104) and the external air discharge outlet (102) are formed at positions facing each other.

[0056] And, the outdoor air flowing into the outdoor air inlet (101) is discharged indoors through the outdoor air outlet (102) located diagonally, and the indoor air flowing into the indoor air inlet (103) is discharged outdoors through the indoor air outlet (104) located diagonally. This is because the outdoor air and the indoor air flow in directions intersecting each other when passing through the air purification module, which will be described later, among the components accommodated inside the housing (11).

[0057] Meanwhile, the duct flange (17) includes an outdoor air inlet flange (171) mounted on the outdoor air inlet port (101), an outdoor air discharge flange (172) mounted on the outdoor air discharge port (102), an indoor air inlet flange (173) mounted on the indoor air inlet port (103), and an indoor air exhaust flange (174) mounted on the indoor air discharge port (104).

[0058] Optionally, a heating device (50) may be mounted on the outside air outlet (102). When the heating device (50) is mounted on the outside air outlet (102), the outside air outlet flange (172) may be mounted on the outlet of the heating device (50).

[0059] In addition, the ventilation device (10) further includes a case accommodated inside the housing (11), and a lower cover (15) provided between the case and the shield cover (16) to cover the bottom surface of the case. A passage hole (151) through which an air purification module, which will be described later, passes is formed in the lower cover (15).

[0060] The above case includes a lower case (14), a middle case (13), and an upper case (12), and the combination of the upper case (12) and the middle case (13) can be defined as a main case (100). The lower cover (15) is mounted on the bottom surface of the lower case (14) and is shielded by the shield cover (16). In addition, the shield cover (16) is rotatably coupled to the housing (11) to selectively shield the shield cover (16).

[0061] The ventilation device (10) further includes an air purification module (40), a cooling module, and a fan module installed inside the case. The cooling module includes components that constitute a refrigerant cycle using a refrigerant as a circulating fluid, and includes at least an evaporator (21) through which a low-temperature, low-pressure two-phase refrigerant flows. In addition, the evaporator (21) may be located on the outlet side of the air purification module (40).

[0062] The above fan module includes an intake fan module (19) that sucks in outdoor air and discharges it indoors, and an exhaust fan module (20) that sucks in indoor air and discharges it outdoors. The fan module includes a fan and a motor that rotates the fan module.

[0063] The above suction fan module (19) can be placed at a point where the outside air outlet (102) is formed, so that the outlet of the suction fan module (19) and the outside air outlet (102) are connected. In addition, the exhaust fan module (20) can be placed at a point where the inside air outlet (104) is formed, so that the outlet of the exhaust fan module (20) and the inside air outlet (104) are connected.

[0064] The air purification module (40) includes a module frame (41) and a heat transfer element (42) accommodated inside the module frame (41). Optionally, the air purification module (40) may further include at least one of a HEPA filter (43), a pre-filter (44), and a light filter (45). The light filter (45) refers to a filter that removes harmful bacteria such as dust mites attached to the outdoor air sucked into the air purification module (40) or the pre-filter (44) by using ultraviolet rays from a UV lamp.

[0065] The above air purification module (40) is arranged in order from the side closest to the outside air inlet (101) with a light filter (45), a pre-filter (44), a HEPA filter (43), and a heating element (42), so that the outside air flowing in through the outside air inlet (101) passes through the light filter (45), the pre-filter (44), the HEPA filter, and the heating element (42) sequentially and is then supplied to the room through the outside air outlet (102).

[0066] Optionally, the ventilation device (10) may further include an air cleaning module (30), and the air cleaning module (30) may be arranged between the evaporator (21) and the air cleaning module (40), or between the evaporator (21) and the suction fan module (19). That is, the air cleaning module (40), the air cleaning module (30), and the evaporator (21) may be arranged on a path through which outdoor air flows, and the arrangement positions of these components may be appropriately selected depending on the structure of the case, particularly the main case (100).

[0067] The fan module may be a centrifugal fan that sucks in air in an axial direction and discharges it in a radial direction, but is not necessarily limited thereto. When the fan module is a centrifugal fan, the discharge port of the suction fan module (19) is directly connected to the outside air discharge port (102). Therefore, the central axis of the outside air discharge flange (172) passes through the center of the discharge port of the suction fan module (19). In another aspect, it can be described that the central axis of the outside air discharge flange (172) (or the central axis of the outside air discharge port) and the fan axis of the suction fan module (19) are orthogonal.

[0068] On the other hand, in order to compactify the ventilation device (10) or to secure space inside the main case (100) when the specifications of the housing (11) are determined, the fan shaft of the exhaust fan module (20) may be arranged parallel to the central axis (L1) of the internal discharge flange (174) (or the central axis of the internal discharge port). That is, the line (L2) passing through the center of the discharge port of the exhaust fan module (20) and the central axis (L1) of the internal discharge flange (174) may be designed to be perpendicular. In addition, an exhaust air flow transition space (1060) is formed between the exhaust fan module (20) and the internal discharge port (104).

[0069] In other words, the mounting position of the exhaust fan module (20) is designed so that the central axis of the exhaust outlet (104) and the rotation axis of the exhaust fan module (20) are parallel.

[0070] Meanwhile, inside the main case (100), an outdoor air passage through which outdoor air flows and an indoor air passage through which indoor air flows are formed in a direction in which they intersect each other. In addition, the air purification module (40) is placed at the point where the indoor air and outdoor air flows intersect. In addition, among the indoor air passages, a first damper unit (22) is installed on the indoor air passage connecting the indoor air inlet (103) and the air purification module (40). The first damper unit (22) allows indoor air flowing into the indoor air inlet (103) to selectively flow to either the air purification module (40) or a bypass passage (described later). The bypass passage is formed between the middle case (13) and the lower case (14), and this will be described in more detail below.

[0071] In addition, a second damper unit (23) is installed inside the main case (100) to switch the flow path so that indoor air flowing into the indoor inlet (103) and toward the bypass flow path flows to the outdoor air flow path where the evaporator (21) is installed. That is, the bypass flow path and the outdoor air flow path can be selectively connected by the second damper unit (23). Specifically, in a situation where rapid cooling is required, indoor air flowing into the indoor inlet (103) can pass through the evaporator (21) and then be discharged back into the room through the outdoor air discharge port (102) by the operation of the second damper unit (23).

[0072] Meanwhile, the ventilation device (10) further includes a control box (18) that controls the operation of various components accommodated inside the housing (11). The various components may include the fan module (19, 20), the damper unit (22, 23), the air cleaning module (30), and the light filter (45). In addition, the control box (18) may be mounted on the side of the housing (11), specifically, on the indoor side.

[0073] Figure 5 is a bottom perspective view of a main case constituting a ventilation device according to an embodiment of the present invention.

[0074] Referring to FIG. 5, the main case (100) can be understood as a combination of the upper case (12) and the lower case (13), as described above.

[0075] Inside the main case (100), an external air path and an internal air path are formed in an intersecting direction. An external air inlet (101) and an internal air outlet (104) are formed on one side of the main case (110), and an internal air inlet (103) and an external air outlet (102) are formed on the other side. Some of the four air passage holes (101 to 104) are formed on the side of the upper case (12), and the remaining some are formed on the side of the lower case (13). When the lower case (13) and the upper case (12) are combined, a completely circular hole is formed.

[0076] Inside the main case (100), a supply air introducing area (1001), a supply air discharge area (1002), an exhaust air introducing area (1003), an exhaust air exhausting area (1004), an air purification module mounting area (1005), a bypass guide area (1006), an exhaust air entrance area (1007), and the exhaust flow conversion space (1060) are each defined.

[0077] The air intake port (103) is formed on one side of the main case (100) defining the edge of the exhaust inlet area (1007), and a first damper hole (106) is formed on the side of the exhaust inlet area (1007) corresponding to the opposite side of the air intake port (103). Then, the first damper unit (22) is mounted in the first damper hole (106).

[0078] Additionally, one end of the bypass guide area (1006) is connected to a side of the exhaust inlet area (1007) where the first damper hole (106) is formed or a side orthogonal to a side where the intake port (103) is formed.

[0079] In addition, the air purification module mounting area (1005) is formed at a point where the supply air path and the exhaust air path intersect. The air purification module mounting area (1005) is formed with first to fourth sides being formed continuously in correspondence with the shape of the air purification module (40).

[0080] The above air inlet area (1001) is defined between the outside air inlet (101) and the first side of the air purification module mounting area (1005).

[0081] The exhaust inlet area (1003) is defined between the second side of the exhaust inlet area (1007) and the air purification module mounting area (1005). Then, the exhaust inlet area (1003) and the exhaust inlet area (1007) are selectively connected by the operation of the first damper unit (22).

[0082] The above bypass guide area (1006) connects the exhaust inlet area (1007) and the inlet of the bypass flow path, and the outlet of the bypass flow path is connected to the exhaust discharge area (1004). The first side and the second side are adjacent sides.

[0083] The above air supply discharge area (1002) is defined between the air supply discharge port (102) and the third side of the air purification module mounting area (1005). The second damper hole (107) is formed at the boundary surface of the air supply discharge area (1002) and the bypass guide area (1006). The bypass guide area (1006) and the air supply discharge area (1002) are selectively connected by the operation of the second damper unit (23). The third side is located opposite the first side.

[0084] In addition, the exhaust discharge area (1004) extends from the fourth side of the air purification module mounting area (1005) to the exhaust flow conversion space (1060). In addition, an exhaust fan mounting hole (105) is formed at the boundary surface dividing the exhaust discharge area (1004) and the air purification module mounting area (1005), and the exhaust fan module (20) discharge port is connected to the exhaust fan mounting hole (105).

[0085] The above exhaust fan mounting hole (105) and the air outlet (104) are formed on a vertical plane intersecting each other, so that indoor air flowing along the exhaust discharge area (1004) is discharged to the air outlet (104) after its flow direction is changed in the exhaust flow conversion space (1060).

[0086] The above exhaust discharge area (1004) and the above supply air discharge area (1002) are partitioned by a fluid separation wall, so that mixing of exhausted indoor air and incoming outdoor air is prevented.

[0087] The above exhaust fan module (20) is placed in the exhaust discharge area (1004), and the above suction fan module (19) is placed in the supply air discharge area (1002).

[0088] FIG. 6 is a bottom perspective view of a middle case constituting a main case of a ventilation device according to an embodiment of the present invention, and FIG. 7 is a plan perspective view of the middle case.

[0089] Referring to FIGS. 6 and 7, the middle case (13) includes a bottom surface (131) to which the top surface of the lower case (14) is coupled, an upper surface (132) to which the bottom surface of the upper case (12) is coupled, and a side surface (133) connecting the top surface (132) and the bottom surface (131).

[0090] The above side (133) includes a first side (133a), a second side (133b), a third side (133c), and a fourth side (133d). The first side (133a) and the third side (133c) face each other, and the second side (133b) and the fourth side (133d) face each other.

[0091] An external air inlet groove (1331) and an internal air discharge groove (1334) are formed on the first surface (133a), and an internal air inlet groove (1333) and an external air discharge groove (1332) are formed on the third surface (133c).

[0092] The above external air inlet groove (1331) forms half of the external air inlet port (101), and the above internal air discharge groove (1334) forms half of the internal air discharge port (104). The above internal air inlet groove (1333) forms half of the internal air inlet port (103), and the above external air discharge groove (1332) forms half of the external air discharge port (102).

[0093] An upper bypass groove (1311) is formed on the edge of the bottom surface (131) of the above middle case (13).

[0094] In detail, the inlet end (one end) of the upper bypass groove (1311), which forms part of the bypass path, is connected to the other end of the bypass guide area (1006). Indoor air flowing into the bypass guide area (1006) is guided to the upper bypass groove (1311) in a ventilation mode. In addition, the outlet end (the other end) of the upper bypass groove (1311) is connected to the exhaust discharge area (1004).

[0095] The upper bypass groove (1311) may be formed in an n-shape along the edge of the middle case (13) to surround the lower edge of the air supply discharge area (1002).

[0096] An extension arm (135) has a predetermined width and extends a predetermined length toward the first surface (133a) from an edge corresponding to the lower end of the second surface (133c) of the bottom surface (131) of the middle case (13). A flow guide wall (136) is formed at an end of the extension arm (135). The flow guide wall (136) extends a predetermined length from both side ends of the extension arm (135) toward the second surface (133b) and the fourth surface (133d), and extends a predetermined height toward the upper surface (132) of the middle case (131). The flow guide wall (136) may extend to the same height as the height of the side surface (133).

[0097] The above extension arm (135) separates the bottom surface of the bypass guide area (1006) and the bottom surface of the exhaust inlet area (1007). In another aspect, it can be explained that the bottom surface of the bypass guide area (1006) is reduced by the width of the extension arm (135).

[0098] A first damper mounting portion (1312) is recessed into the inner edge of the fourth surface (133d) corresponding to one side of the first damper hole (106) and into one side of the flow guide wall (136) corresponding to the other side of the first damper hole (106). Then, both sides of the first damper unit (22) are fitted into the first damper mounting portion (1312).

[0099] In addition, a second damper mounting portion (1313) is formed by recessing into the other side of the flow guide wall (136) corresponding to one side of the second damper hole (107) and into the inlet end of the upper bypass groove (1311) corresponding to the other side of the second damper hole (107). Then, both sides of the second damper unit (23) are fitted into the second damper mounting portion (1313).

[0100] The other end of the above-mentioned fluid guide wall (136) contacts one of the four corners of the air purification module (40) and supports one corner of the air purification module (40).

[0101] Meanwhile, a lower flow separation wall (134) extends from the inner edge of the outlet end of the upper bypass groove (1311). The lower flow separation wall (134) forms a lower portion of the flow separation wall.

[0102] A pipe receiving portion (1341) is formed stepwise upward on the lower surface of the lower flow separation wall (134). The organ (211) and the liquid pipe (212) extending from the evaporator (21) pass through the pipe receiving portion (1341). That is, the organ (211) and the liquid pipe (212) extend to the lower side of the lower flow separation wall (134).

[0103] Additionally, a pipe guide protrusion (137) protrudes from the inner surface of the first surface (133a). One side of the pipe guide protrusion (137) supports the side surface of the air purification module (40), and the other side forms a portion of the edge of the exhaust discharge area (1004).

[0104] A liquid pipe receiving groove (1371) and an organ receiving groove (1372) are formed on the lower surface of the above pipe guide jaw (137), respectively. The liquid pipe (212) and the organ (211) passing through the pipe receiving portion (1341) of the lower flow separation wall (134) extend along the organ receiving groove (1372) and the liquid pipe receiving groove (1371), respectively, and pass through the first surface (133a).

[0105] In addition, an air purification module support jaw (138) protrudes from the inner surface of the fourth surface (133d), and one side of the air purification module support jaw (138) supports the side of the air purification module (40), and the other side forms the edge of the exhaust inlet area (1003).

[0106] One side of the above air purification module support jaw (138) is formed to face one side of the above pipe guide jaw (137).

[0107] Meanwhile, a suction fan receiving groove (1323) is formed in a recessed manner on one side of the upper surface (132) of the middle case (13). The suction fan receiving groove (1323) is formed in a corner area where the second surface (133b) and the third surface (133c) meet. The outside air discharge groove (1332) formed on the third surface (133c) communicates with the suction fan receiving groove (1323).

[0108] In addition, an exhaust flow diversion surface (1322) defining a bottom surface of the exhaust flow diversion space (1060) is formed on the upper surface (132) corresponding to the corner area where the first surface (133a) and the second surface (133b) meet. In addition, an exhaust fan mounting wall defining one side of the flow diversion space (1060) is formed on the upper surface of the middle case (13), and an exhaust fan mounting groove (1321) is formed on the exhaust fan mounting wall. An exhaust discharge groove (1334) is formed on the first surface (133a). A line (L2) passing through the center of the exhaust fan mounting groove (1321) and a line (L1) passing through the center of the exhaust discharge groove (1334) are perpendicular to each other. That is, the indoor air flowing in through the exhaust fan mounting groove (1321) is turned 90 degrees and discharged to the outdoors through the exhaust discharge groove (1334).

[0109] FIG. 8 is a bottom perspective view of an upper case constituting a main case of a ventilation device according to an embodiment of the present invention, and FIG. 9 is a bottom perspective view of the main case.

[0110] Referring to Fig. 8, the upper case (12) is placed on the upper surface of the middle case (13) and covers the open areas formed on the inside of the middle case (13). In addition, protruding walls corresponding to the shape of the upper surface of the middle case (13) extend from the lower surface of the upper case (12).

[0111] In detail, the upper case (12) includes a bottom surface (121) that is in close contact with the upper surface of the middle case (13), an upper surface (122) that is the opposite surface of the bottom surface (121), and a side surface (123) that connects the bottom surface (121) and the upper surface (122).

[0112] And, the side surface (123) includes a first surface (123a), a second surface (123b), a third surface (123c), and a fourth surface (123d). The first surface (123a) forms the same surface as the first surface (133a) of the middle case (13), and the second surface (123a) forms the same surface as the second surface (133b) of the middle case (13). And, the third surface (123c) forms the same surface as the third surface (133c) of the middle case (13), and the fourth surface (123d) forms the same surface as the fourth surface (133d) of the middle case (13).

[0113] An external air inlet groove (1231) and an internal air discharge groove (1234) are formed on the first surface (123a). The external air inlet groove (1231) and the external air inlet groove (1331) of the middle case (13) are combined to form a complete external air inlet port (101). The internal air discharge groove (1234) and the internal air discharge groove (1334) of the middle case (13) are combined to form a complete internal air discharge port (104).

[0114] An internal air inlet groove (1233) and an external air discharge groove (1232) are formed on the third surface (123c). The internal air inlet groove (1233) and the internal air inlet groove (1333) of the middle case (13) are combined to form a complete internal air inlet port (103). The external air discharge groove (1232) and the external air discharge groove (1232) of the middle case (13) meet to form a complete external air discharge port (102).

[0115] A first air purification module support jaw (126) protrudes from the inner surface of the first surface (123a), and the first air purification module support jaw (126) is in close contact with the pipe guide jaw (137) of the middle case (13).

[0116] The flow diversion space (106) is formed by recessing in the lower edge area of ​​the upper case (12) where the exhaust discharge groove (1234) is formed. When the upper case (12) is coupled to the upper surface of the middle case (13), the exhaust flow diversion surface (1322) forms the lower surface of the flow diversion space (106).

[0117] And, an exhaust fan mounting wall (129) defining one side of the euro conversion space (106) is formed on the bottom surface of the upper case (12), and an exhaust fan mounting groove (1291) is formed in the exhaust fan mounting wall (129). And, the exhaust fan mounting groove (1321) of the middle case (13) and the exhaust fan mounting groove (1291) are combined to form a complete exhaust fan mounting hole (105: see FIG. 5).

[0118] An upper flow separation wall (124) extends diagonally from the bottom surface of the upper case (12) corresponding to the corner portion of the above-mentioned euro conversion space (106), and the upper flow separation wall (124) is in close contact with the lower flow separation wall (134) of the middle case (13) to complete a complete flow separation wall (see FIG. 5). The end portion of the flow separation wall functions as a module support wall that supports one corner of the air purification module (40).

[0119] On the lower surface of the upper case (12) corresponding to the upper surface directly above the air supply inlet area (1001), the air supply discharge area (1002), the exhaust inlet area (1003), the exhaust discharge area (104), the air purification module mounting area (1005), the bypass guide area (1006), and the exhaust inlet area (1007) formed in the middle case (13), an air supply inlet area (1001), an air supply discharge area (1002), an exhaust inlet area (1003), an exhaust discharge area (104), an air purification module mounting area (1005), a bypass guide area (1006), and an exhaust inlet area (1007) having the same shape and size are formed.

[0120] A flow guide wall (125) protrudes from the bottom surface of the upper case (12) and is in close contact with the flow guide wall (136) of the middle case (13). In addition, a first damper mounting portion (1212) is formed by being sunken in at a position corresponding to the first damper mounting portion (1312) of the middle case (13), and a second damper mounting portion (1213) is formed by being sunken in at a position corresponding to the second damper mounting portion (1313) of the middle case (13). That is, a first damper mounting portion (1212) is formed at one end of the flow guide wall (125), and a second damper mounting portion (1213) is formed at the other end.

[0121] Meanwhile, as shown in Fig. 3, the evaporator (21) is placed between the air purification module (40) and the suction fan module (19), the upper surface of the evaporator (21) is shielded by the upper case (12), and a drain pan (24), which will be described later, is placed on the lower surface.

[0122] Evaporator support ribs (127) protrude from the bottom surface of the upper case (12) corresponding to the two short-side edges among the upper surface edges of the evaporator (21).

[0123] Referring to Fig. 9, the two evaporator support ribs (127) protrude from the inlet-side edge point of the outside air discharge area (1002). Each of the evaporator support ribs (127) is formed in a form that is bent multiple times to wrap around the upper edge of the evaporator (21).

[0124] Meanwhile, the evaporator (21) includes an evaporator body (211) composed of an evaporation pipe and a heat exchange fin, and a support channel (212) mounted on a short side of the evaporator body (211) to support the evaporation pipe.

[0125] The above support channel (212) has a cross-sectional shape that is bent in an approximately n-shape, and a channel support wall (139b) that supports the support channel (212) may be formed on the inner edge of the inlet end of the upper bypass groove (1311). That is, one of the two support channels (212) is supported by the channel support wall (139b). The channel support wall (139b) is formed at a position adjacent to one of the two evaporator support ribs (127).

[0126] A channel support wall (139a) may also be formed at a point adjacent to another one of the two evaporator support ribs (127). In addition, an end of the other one of the two support channels (212) may be closely fixed to the channel support wall (139a).

[0127] Figure 10 is a drawing showing the lower case separated from the bottom of the main case, and Figure 11 is a perspective view of the bottom of the lower case.

[0128] Referring to FIGS. 10 and 11, the case of the ventilation device (10) according to an embodiment of the present invention includes a main case (100) and a lower case (14) coupled to the bottom surface of the main case (100). In detail, the main case (100) is defined as a combination of the upper case (12) and the lower case (13), and the lower case (14) is coupled to the bottom surface of the middle case (13).

[0129] The lower case (14), like the upper case (12) or the middle case (13), includes an upper surface (41), a lower surface (142), and a side surface (143), and the side surface (143) includes a first surface (143a), a second surface (143b), a third surface (143c), and a fourth surface (143d).

[0130] Each of the first to fourth surfaces (143a to 143d) above forms the same surface as each of the first to fourth surfaces (123a to 123d) of the upper case (12) and each of the first to fourth surfaces (133a to 133d) of the middle case (13).

[0131] On the upper surface of the lower case (14), a lower bypass groove (1411) is formed that is coupled to the upper bypass groove (1311) of the middle case (13), and the upper bypass groove (1311) and the lower bypass groove (1411) are coupled to complete a complete bypass path.

[0132] An air purification module insertion hole (145) and a drain pan mounting hole (144) are formed in the above lower case (14).

[0133] A module support wall (1415) extends from the upper surface (141) corresponding to one edge of the air purification module insertion hole (145), and the module support wall (1415) touches the lower surface of the end of the flow separation wall. In detail, when the lower case (14) is coupled to the lower surface of the middle case (13), the module support wall (1415) touches the lower surface of the end of the lower flow separation wall (134) of the middle case (13). Here, the end of the module support wall (1415) touches a portion other than the pipe receiving portion (1341), and thus does not interfere with the organ (211) and the liquid pipe (212) passing through the pipe receiving portion (1341).

[0134] And, at a certain point of the upper surface (141) corresponding to the direct lower side of the pipe receiving portion (1341), a pipe receiving groove (1414) is formed to receive the liquid pipe (212) and the organ (211).

[0135] An organ receiving groove (1413) and a liquid pipe receiving groove (1412) are formed in a recessed manner on the upper side of the first surface (143a) of the lower case (14) corresponding to the first surface (133a) of the middle case (13), and are coupled to the liquid pipe receiving groove (1371) and the organ receiving groove (1372) of the middle case (13).

[0136] Meanwhile, a drain pipe receiving groove (1421) is formed in a sunken manner on the bottom surface of the lower case (14), one end of the drain pipe receiving groove (1421) is connected to the drain pan mounting hole (144), and the other end extends to the side surface (143) of the lower case (14). For example, the other end of the drain pipe receiving groove (1421) may extend to the first surface (143a).

[0137] FIG. 12 is a bottom perspective view of a drain pan coupled to a lower case of a ventilation device according to an embodiment of the present invention, and FIG. 13 is a plan perspective view of the drain pan.

[0138] Referring to FIGS. 12 and 13, the drain pan (24) of the ventilation device (10) according to the embodiment of the present invention is coupled to the drain pan mounting hole (144) formed in the lower case (14) to shield the drain pan mounting hole (144).

[0139] The evaporator (21) is placed on the upper surface of the drain pan (24), and the condensate flowing from the evaporator (21) is collected in the drain pan (24).

[0140] In detail, the drain pan (24) includes an evaporator mounting portion (241), a condensate collecting portion (242) formed at one end of the evaporator mounting portion (241), and a drain port (243) extending from one edge of the condensate collecting portion (242).

[0141] The above drain pan (24) is composed of a bottom portion (24a) where condensate falls and a side portion (24b) erected along the edge of the bottom portion (24a), and the drain port (243) can protrude a predetermined length from the side portion (24b).

[0142] A plurality of flow guides (244) protrude from the bottom portion (24a) so that condensate flowing from the evaporator (21) can be guided toward the drain port (243). The drain port (243) is connected to the drain pipe receiving groove (1421) of the lower case.

[0143] Below, the internal flow path structure for increasing the air volume supplied indoors and improving the performance of the evaporator is described in detail with reference to the drawings.

[0144] Fig. 14 is a plan view of a ventilation device equipped with a connecting duct for increasing air volume and securing evaporator performance, and Fig. 15 is a side view showing a state in which an extension duct is connected to a fan housing of a suction fan module.

[0145] Referring to FIGS. 14 and 15, a ventilation device (10) according to an embodiment of the present invention may include an extension duct (60) provided to connect between an outlet of a suction fan module (19) and an inlet of the outside air discharge flange (172).

[0146] In detail, the above-described suction fan module (19) includes a fan housing (191), a fan mounted inside the fan housing (191), and a fan motor that drives the fan. This configuration is also the same as the above-described exhaust fan module (20), and the fan includes a sirocco fan.

[0147] The fan housing (191) includes an intake port (1911), a flow guide portion (1916) extending roundly along an edge of the intake port (1911), a cut-off portion (1915) extending from a starting point of the flow guide portion (1911), and an outlet port (1914) formed on a surface passing through an end of the flow guide portion (1916) and an end of the cut-off portion (1915).

[0148] The above-mentioned flow guide portion (1916) includes a curved portion formed in a round shape that surrounds the suction port (1911) in a spiral shape at a point radially spaced from the point where the cut-off portion (1915) begins, and a straight portion that extends in a straight shape from the curved portion to the outer end (1913) of the discharge port (1914).

[0149] In addition, the curved portion extends in a form in which the curvature of the suction port (1911) gradually becomes smaller as it moves toward the straight portion, thereby forming a form in which the distance between the edge of the suction port and the curved portion gradually increases. In other words, the flow cross-sectional area inside the fan housing (191) gradually increases as it moves from the cut-off portion (1915) toward the end of the curved portion.

[0150] Additionally, the cut-off portion (1915) extends parallel to the straight portion of the flow guide portion (1916). The tangent line passing through the starting point of the flow guide portion (1916) and the cut-off portion (1915) form an acute angle of less than 90 degrees.

[0151] The above discharge port (1915) may be formed into a rectangular shape by an outer end (1913) defined at an end of the flow guide portion (1916), an inner end (1912) defined at an end of the cut-off portion (1915), and a pair of side ends connecting both ends of the outer end (1914) and the inner end (1912).

[0152] On the other hand, the through hole formed at the inlet end of the above-mentioned external air discharge flange (172) and the side surface of the above-mentioned housing (11) is formed in a circular shape with a diameter larger than the diagonal length of the above-mentioned discharge port (1915). Therefore, when air is discharged from the above-mentioned discharge port (1915), the flow path rapidly expands, causing a vortex phenomenon to occur in the edge region.

[0153] The extension duct (60) is provided to minimize the occurrence of eddy currents at the edge of the discharge port (1915).

[0154] The characteristics of the above extension duct (60) can be broadly explained in the following two points.

[0155] First, the shape and size of the inlet end of the extension duct (60) are substantially the same as the shape and size of the discharge port (1914) of the fan housing (191), and the shape and size of the outlet end of the extension duct (60) are substantially the same as the shape and size of the inlet end of the outside air discharge flange (172). As a result, the occurrence of a vortex phenomenon at the outlet of the fan housing (191) can be minimized.

[0156] Second, it is characterized by a gradual increase in internal flow path from the inlet end of the extension duct (60) toward the outlet end. As a result, a rapid decrease in flow pressure can be prevented.

[0157] Below, the structure and function of the above extension duct (60) will be described in detail with reference to the drawings.

[0158] FIG. 16 is a bottom perspective view of an extension duct according to an embodiment of the present invention, FIG. 17 is a top perspective view of the extension duct, and FIG. 18 is a longitudinal cross-sectional view of the extension duct taken along line 18-18 of FIG. 16.

[0159] FIG. 19 is a cross-sectional cut-away perspective view of an extension duct cut along line 19-19 of FIG. 16, and FIG. 20 is a cross-sectional cut-away perspective view of an extension duct cut along line 20-20 of FIG. 16.

[0160] FIG. 21 is a longitudinal cross-sectional perspective view of an extension duct cut along 21-21 of FIG. 17, and FIG. 22 is a longitudinal cross-sectional perspective view of an extension duct cut along 22-22 of FIG. 17.

[0161] Referring to FIGS. 16 to 22, the extension duct (60) according to the embodiment of the present invention has a structure in which the flow cross-sectional area gradually increases from the inlet (601) to the outlet (602).

[0162] In detail, the flow cross-sectional area of ​​the extension duct (60) increases as it slopes downward from the lower end connected to the inner end (1912) of the fan housing (191) toward the outlet (602).

[0163] In more detail, the extension duct (60) includes a duct body (61), a fan shoulder (62) bent at the inlet-side edge of the duct body (61), and a flange shoulder (63) bent at the outlet-side edge of the duct body (61).

[0164] A shoulder that is in close contact with the fan shoulder (62) is formed at the edge of the discharge port (1914) of the fan housing (191).

[0165] A plurality of fastening holes (621) are formed in the above fan shoulder (62), and a fastening member penetrating the fastening holes (621) is inserted into the shoulder formed at the edge of the discharge port of the fan housing (191).

[0166] The inlet (601) of the above extension duct (60) can be formed in a shape corresponding to the shape of the outlet (1914) of the fan housing (191), and in the present embodiment, it is formed tapered at the upper left and right corners of the inlet (601).

[0167] The flange shoulder (63) is in close contact with the edge of the through hole formed in the side surface of the housing (11), and the shoulder formed at the inlet end of the outside air discharge flange (172) is in close contact with the side surface of the housing (11) corresponding to the opposite side of the flange shoulder (63). In addition, the fastening member is inserted into the shoulder formed at the inlet end of the outside air discharge flange (172) by penetrating the flange shoulder (63) and the side surface of the housing (11).

[0168] Meanwhile, the duct body (61) includes a duct neck (611) extending from the inlet (601) toward the flange shoulder (63). The duct neck (611) extends from the upper surface, lower surface, and left and right edges of the inlet (601).

[0169] The above duct body (61) includes an upper portion (612) extending from the upper surface of the rear end of the duct neck (611), a lower portion (613) extending from the lower surface of the rear end of the duct neck (611), a left extension portion (616) and a right extension portion (617) extending from the left and right sides of the rear end of the duct neck (611), and a left tapered portion (614) and a right tapered portion (615) extending from the left and right corner portions of the tapered inlet (601), respectively.

[0170] In detail, the upper surface (612), lower surface (613), and left and right extensions (616, 617) extend from the rear end of the duct neck (611), while the left and right tapered portions (614, 615) extend from the corners of the inlet (601).

[0171] In addition, the upper surface portion (612) extends in the same direction as the extension direction of the straight portion constituting the flow guide portion (1916) of the fan housing (191), whereas the portions excluding the upper surface portion (612), i.e., the left and right tapered portions (614, 615), the left and right extended portions (616, 617), and the lower surface portion (613), extend in an inclined direction away from the central axis of the duct body (61) as they go toward the flange shoulder (63). The central axis of the duct body (61) may be defined as a straight line passing through the center of the inlet (601) and parallel to the upper surface portion (612).

[0172] In addition, the duct body (61) has a left chamfering part (618) and a right chamfering part (619) formed at the boundary where the left extension part (616) and the lower part (613) meet, and at the boundary where the right extension part (616) and the lower part (613) meet, respectively.

[0173] The left and right chamfered portions (618, 619) start at a point spaced a predetermined distance from the duct neck (611) toward the flange shoulder (61) and extend to the flange shoulder (63). In addition, the left and right chamfered portions (618, 619) extend parallel to the upper surface (612).

[0174] According to this structure, the rear end of the duct body (61), i.e., the outlet (602), can be formed in an octagonal shape. In addition, the eight straight sections forming the outlet (602) can be described as corresponding to eight tangent lines passing through circular through holes formed on the side surface of the housing (11), or corresponding to eight lines extending parallel to the tangent lines from the outside of the tangent lines.

[0175] As shown in Fig. 18, the upper surface (61) extends along the same line as the straight portion of the flow guide (1916), so that no flow resistance occurs in the air discharged through the outer end of the discharge port (1914) of the fan housing (191).

[0176] In addition, the lower surface (613) is extended in a downwardly inclined direction away from the upper surface (612), so that the air discharged while rotating along the inner edge of the fan housing (191), i.e., the edge of the suction port (1911), flows along the lower surface (613). In this way, by linearly expanding the flow cross-sectional area from the inlet to the outlet of the extension duct (60), the pressure of the air discharged from the fan housing (191) can be lowered and the flow velocity can be increased. Then, since the air can flow far inside the supply duct connected to the outside air discharge flange (172), the overload on the suction fan module (19) can be minimized.

[0177] In addition, since the shape of the outlet (602) of the extension duct (60) is formed into a polygonal shape that is close to the shape of the inlet of the outside air discharge flange (172), the flow resistance occurring between the extension duct (60) and the outside air inlet flange (172) can be minimized.

[0178] In the presented embodiment, the left and right tapered portions (614, 615) are formed in a ladder-shaped shape, but as another example, the inlet (601) of the extension duct (60) may be formed in a square shape identical to the shape of the outlet (1914) of the fan housing (191), and the duct neck (611) may also be formed in a short square shape. In addition, the left and right tapered portions (614, 615) may be formed in a triangular shape extending from the upper left and right corners of the duct neck (611).

[0179] Meanwhile, the angle of inclination (θ) formed by the extension line passing through the duct neck (611) and the lower surface (613) may be designed within a range of 17° to 21°. If the angle of inclination (θ) exceeds 21 degrees, there is a problem that the pressure of the air discharged from the fan housing (191) rapidly decreases, and if it is less than 18 degrees, there is a problem that the load on the fan increases due to stagnation of flow inside the extension duct (60) because the pressure drop at the discharge port (1914) is small. Furthermore, the angle of inclination (θ) is preferably designed to be 18° to 20°, and more preferably, it is preferably designed to be 19°.

[0180] Meanwhile, by providing the extension duct (60) between the outlet of the suction fan module (19) and the outside air discharge port (102), the installation location of the suction fan module (19) can be brought closer to the side of the housing (11) where the inside discharge flange (174) is coupled.

[0181] As a result, in the rapid cooling mode for cooling indoor air and supplying it back into the room, the flow of indoor air passing through the evaporator (21) while being biased toward one edge of the evaporator (21) changes to the flow of air (arrow indicated by a dotted line in FIG. 14) that spreads out more widely toward the center of the evaporator (21) (arrow indicated by a solid line in FIG. 14). In this way, as the flow of indoor air moves from the edge to the center of the evaporator (21), the heat exchange area of ​​the evaporator (21) increases, so there is an advantage of improving the heat exchange performance of the evaporator (21).

[0182] In addition, as the flow of indoor air sucked through the intake flange (173) changes from a sharply curved shape to a gently curved shape, an additional effect of reducing flow resistance can be obtained.

Claims

1. A housing having an external air inlet and an internal air outlet formed on one side, and an internal air inlet and an external air outlet formed on the other side facing said one side; An air purification module housed inside the housing and including a heating element; An evaporator disposed between the air purification module and the outside air outlet; A drain pan placed on the lower side of the evaporator to receive condensate generated in the evaporator; A suction fan module disposed inside the housing and having an outlet connected to the outside air outlet; An exhaust fan module disposed inside the housing and having an exhaust outlet connected to the exhaust outlet; and A ventilation device including an extension duct connecting the discharge port of the above suction fan module and the above outdoor air discharge port.

2. In paragraph 1, The above extension duct, A duct body having an inlet and an outlet formed at each end, A fan shoulder extending in a direction intersecting the extension direction of the duct body along the edge of the inlet port and coupled to the outlet port of the suction fan module; and A flange shoulder is included that extends in a direction intersecting the extension direction of the duct body along the edge of the outlet and is coupled to a side of the housing where the outside air discharge port is formed. The above duct body, A ventilation device characterized in that the cross-sectional area increases as it goes from the inlet to the outlet.

3. In paragraph 2, The above inlet is formed in the same shape as the outlet of the above suction fan module, The above outlet is formed in a polygonal shape, A ventilation device characterized in that the above polygonal shape is formed by connecting the tangents of the outside air discharge ports.

4. In paragraph 3, The above suction fan module, Includes a fan housing having a fan housed inside, The above fan housing, suction inlet; A flow guide including a curved portion that is rounded along the suction port on the outside of the suction port and a straight portion that extends from an end of the curved portion; and Including a cut-off portion extending parallel to the straight portion from the starting point of the curved portion, The discharge port of the above suction fan module is, An outer end defining an end of the above straight line, and an inner end defining an end of the above cut-off portion, and A ventilation device including side ends each connecting two ends of the outer end and two ends of the inner end.

5. In paragraph 4, A ventilation device characterized in that the inlet of the above duct body has the same shape as the outlet of the above suction fan module.

6. In paragraph 5, The above duct body, An upper surface extending from the upper end of the inlet to the outlet, but extending along the same line as the straight portion; A lower portion extending from the lower end of the inlet to the outlet, but extending in a direction away from the upper surface as it goes toward the outlet; Left and right extensions extending from the left and right sides of the inlet to the outlet, but extending in a direction that becomes more distant from each other as they go toward the outlet; and It includes left and right tapered portions extending from the left and right edges of the upper surface and the left and right extension portions to the outlet, respectively. Each of the above left and right taper sections, A ventilation device characterized in that the length of the end defining the outlet is formed longer than the length of the end on the inlet side.

7. In paragraph 6, Further comprising left and right chamfered portions extending from the boundary point where the left and right edges of the lower portion meet the left and right extensions to the outlet, A ventilation device, characterized in that the starting point of each of the left and right chamfer sections is located at a point spaced apart from the inlet toward the outlet.

8. In paragraph 7, A ventilation device characterized in that the upper surface and the left and right chamfers extend parallel to each other.

9. In paragraph 8, The above polygon is, A ventilation device characterized by having an octagonal shape in which the upper surface, lower surface, left and right extended portions, left and right tapered portions, and left and right chamfered portions are connected.

10. In paragraph 8, The above duct body, Further comprising a duct neck extending from the edge of the above inlet, A ventilation device characterized in that at least the upper surface, lower surface, and left and right extensions extend from an end of the duct neck.

11. In Article 10, A ventilation device characterized in that the left and right tapered portions extend from the upper left and right corners of the inlet.

12. In paragraph 11, A ventilation device characterized in that the upper left and right edges of the inlet are formed to be tapered.

13. In paragraph 6, A ventilation device characterized in that the angle of inclination formed by the upper surface and the lower surface is within the range of 17 to 21 degrees.

14. In paragraph 13, A ventilation device characterized in that the angle of inclination formed by the upper surface and the lower surface is within the range of 18 to 20 degrees.

15. In paragraph 14, A ventilation device characterized in that the angle of inclination formed by the upper surface and the lower surface is 19 degrees.

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