Ventilation device

Abstract

A ventilation device according to an embodiment of the present invention is equipped with a differential pressure sensor that detects a pressure difference between an inlet and an outlet of a HEPA filter, and an inlet-side sensing path and an outlet-side sensing path connected to the differential pressure sensor are formed. The inlet-side sensing path includes an inlet-side vertical path through which inlet-side air of the HEPA filter flows in, and a plurality of inlet-side horizontal paths connected to the inlet-side vertical path, and the outlet-side sensing path includes an outlet-side vertical path through which outlet-side air of the HEPA filter flows in, and a plurality of outlet-side horizontal paths connected to the outlet-side vertical path. The plurality of inlet-side horizontal paths and the plurality of outlet-side horizontal paths are spaced apart from each other in the vertical direction along the length of the HEPA filter.

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] Ventilation systems can be installed in residential or commercial buildings, including apartments. In particular, apartments may have design drawings showing two symmetrical units facing each other or arranged side by side. In this case, it is necessary to ensure that the same ventilation system is installed in both units.

[0004] However, some currently available ventilation devices, including the one disclosed in Prior Art 1 below, have an asymmetrical internal structure. Ventilators with an asymmetrical internal structure have the limitation that they cannot be installed in either of two symmetrical units. To address this issue, conventional ventilation devices are often equipped with a separate kit that switches the flow of indoor and outdoor air.

[0005] In addition, recently, as disclosed in the prior art below, a ventilation device has been released that has a bypass path inside so that indoor air is bypassed without passing through the heat exchanger and is discharged directly to the outdoors.

[0006] However, the ventilation device disclosed in the prior art 1 below also has a limitation in that it cannot be installed in either of two apartments with a symmetrical structure, because it has an asymmetrical internal structure.

[0007] In addition, the prior art 2 below discloses a ventilation device equipped with a differential pressure sensor that detects the pressure at the inlet and outlet of the filter and thereby detects the pressure difference between the inlet and outlet of the filter.

[0008] The ventilation device disclosed in prior art 2 has the following problems.

[0009] First, since the filter and differential pressure sensor module are combined into one body, there is a disadvantage in that filter replacement is inconvenient.

[0010] Second, the structure of the differential pressure measurement module is complex, which causes the accuracy of differential pressure measurement to be low.

[0011] Third, single-point measurement has the disadvantage of not being able to accurately detect the pressure difference between the inlet and outlet at the top of the filter and the inlet and outlet at the bottom. As a result, dust may accumulate at points other than the differential pressure measurement point, potentially delaying filter replacement even when it is necessary.

[0012] Prior Art 1: Korean Patent Publication No. 10-2022-0045405 (April 12, 2022)

[0013] Prior Art 2: Korean Patent Publication No. 10-2021-0118493 (October 1, 2021)

[0014] The present invention is proposed to improve the above problems.

[0015] According to an embodiment of the present invention for achieving the above object, a ventilation device comprises: a housing including an air inlet, an air outlet, an outdoor air inlet, and an outdoor air outlet; a case accommodated inside the housing; an intake fan mounted inside the case, the intake fan having an outlet connected to the outdoor air outlet; an exhaust fan mounted inside the case, the exhaust fan having an outlet connected to the outdoor air outlet; a hexahedral heat exchanger mounted inside the case, the hexahedral heat exchanger formed by an indoor air path and an outdoor air path intersecting each other; filters installed at points where outdoor air passing through the heat exchanger flows and at points where indoor air passing through the heat exchanger flows, respectively; And a differential pressure sensor provided to detect a pressure difference between the inlet and the outlet of the filter, wherein the case includes a partition wall extending from the upper surface to the lower surface of the housing and supporting one edge of the heat exchanger, and the partition wall includes a heat exchanger mounting groove supporting one edge of the heat exchanger, a filter mounting groove supporting one side of the filter, and a pressure sensing passage for detecting a pressure difference between the inlet and the outlet of the filter, and the pressure sensing passage includes a vertical passage extending in the longitudinal direction of the partition wall from the rear of the filter mounting groove and connected to the differential pressure sensor, and a plurality of horizontal passages extending horizontally toward the vertical passage from one edge and the other edge of the filter mounting groove, wherein the plurality of horizontal passages are formed to be spaced apart from each other by a predetermined distance between the upper and lower ends of the partition wall.

[0016] The above vertical flow path includes an inlet-side vertical flow path through which inlet-side air of the filter flows in, and an outlet-side vertical flow path through which outlet-side air of the filter flows in, and the plurality of horizontal flow paths includes a plurality of inlet-side horizontal flow paths connected to the inlet-side vertical flow paths, and a plurality of outlet-side horizontal flow paths connected to the outlet-side vertical flow paths.

[0017] One end of each of the plurality of inlet-side horizontal channels is formed at one end of the filter mounting groove, and the other end is connected to the inlet-side vertical channel, and one end of each of the plurality of outlet-side horizontal channels is formed at the other end of the filter mounting groove, and the other end is connected to the outlet-side vertical channel.

[0018] A differential pressure sensor mounting groove in which the differential pressure sensor is mounted is formed recessed on the upper surface of the partition wall, and the inlet-side vertical passage and the outlet-side vertical passage communicate with the bottom of the differential pressure sensor mounting groove, and the differential pressure sensor includes a sensor body that is seated in the differential pressure sensor mounting groove and a detection port that extends from the sensor body, and the detection port includes an inlet port that is inserted into the inlet-side vertical passage and an outlet port that is inserted into the outlet-side vertical passage.

[0019] The above-mentioned air inlet and the outside air outlet are formed on one side of the housing, the above-mentioned air outlet and the outside air inlet are formed on the other side of the housing, and the above-mentioned air inlet is formed at a position facing the outside air inlet, and the above-mentioned air outlet is formed at a position facing the outside air outlet.

[0020] The above case includes an intake-side bypass path that guides outdoor air flowing into the outside air inlet to a space where the intake fan is placed, bypassing the heat exchange element, and an exhaust-side bypass path that guides indoor air flowing into the indoor air inlet to a space where the exhaust fan is placed, bypassing the heat exchange element.

[0021] The case is characterized in that it includes an intake guide hole formed at an edge adjacent to the outside air outlet and communicating with a space where the intake fan is placed, and an exhaust guide hole formed at an edge adjacent to the inside air outlet and communicating with a space where the exhaust fan is placed, and an outlet of the intake-side bypass flow path communicates with the intake guide hole, and an outlet of the exhaust-side bypass flow path communicates with the exhaust guide hole.

[0022] The above-mentioned intake-side bypass path and the above-mentioned exhaust-side bypass path are characterized in that they have a symmetrical shape centered on a dividing plane that passes between one side and the other side of the housing and bisects the case.

[0023] The inlet of the above intake-side bypass flow path is formed at a point spaced apart from the exhaust guide hole in a direction approaching the outside air inlet, and the inlet of the above exhaust-side bypass flow path is formed at a point spaced apart from the intake guide hole in a direction approaching the inside air inlet.

[0024] The intake-side bypass flow path includes a first portion that extends from the inlet of the intake-side bypass flow path toward the exhaust guide hole and is bent to extend along the edge of the exhaust guide hole, and a second portion that is bent at an end of the first portion and communicates with the intake guide hole, and the exhaust-side bypass flow path includes a third portion that extends from the inlet of the exhaust-side bypass flow path toward the intake guide hole and is bent to extend along the edge of the intake guide hole, and a fourth portion that is bent at an end of the second portion and communicates with the exhaust guide hole.

[0025] The second part intersects the fourth part while passing through the upper or lower side of the fourth part, and the dividing surface is characterized in that it passes through the point where the second part and the fourth part intersect.

[0026] The ventilation device according to the present invention further includes an intake-side bypass damper module placed on the inlet side of the intake-side bypass passage, and an exhaust-side bypass damper module placed on the inlet side of the exhaust-side bypass passage.

[0027] The ventilation device according to the present invention further includes an intake-side bypass filter unit placed between the inlet of the intake-side bypass channel and the intake-side bypass damper module, and an exhaust-side bypass filter unit placed between the inlet of the exhaust-side bypass channel and the exhaust-side bypass damper module.

[0028] The ventilation device according to the present invention further includes an intake-side pre-filter installed at the outside air inlet port and an exhaust-side pre-filter installed at the inside air inlet port.

[0029] The filter includes an intake-side HEPA filter disposed between the heat exchange element and the outside air discharge port, and an exhaust-side HEPA filter disposed between the heat exchange element and the inside air discharge port, and the filter mounting portion includes a first mounting portion on which one side of the intake-side HEPA filter is mounted, and a second mounting portion on which one side of the exhaust-side HEPA filter is mounted.

[0030] According to the ventilation device according to an embodiment of the present invention, the internal structure is designed symmetrically, so that it has the advantage of being able to be installed in both apartments of two households having a symmetrical design structure.

[0031] Furthermore, the symmetrical configuration of the intake-side bypass path and exhaust-side bypass path not only allows indoor air to be discharged directly to the outdoors without passing through the heat exchanger, but also allows outdoor air to be supplied directly to the indoors without passing through the heat exchanger. Consequently, in situations where the indoor-outdoor temperature difference is large, outdoor air can be supplied directly to the indoors without heat exchange, providing the advantage of quickly raising or lowering the indoor temperature depending on the season.

[0032] In addition, since a means for measuring differential pressure is installed on the central partition wall supporting the HEPA filter, there is an advantage in that the replacement of the HEPA filter is easy.

[0033] In addition, since detection holes for pressure measurement are formed at multiple points in the vertical direction along the HEPA filter mounting groove, there is an advantage in that the differential pressure at the inlet and outlet of the HEPA filter can be accurately measured.

[0034] Figure 1 is a plan perspective view of a ventilation device according to an embodiment of the present invention.

[0035] Figure 2 is a bottom perspective view of the ventilation device rotated along 2-2 of Figure 1.

[0036] Figures 3 and 4 are exploded perspective views showing the joint relationship between the housing and flanges forming the ventilation device.

[0037] Figure 5 is a plan view of the ventilation device with the housing and flange removed.

[0038] Figure 6 is a bottom view of the ventilation device with the housing and flange removed.

[0039] Figure 7 is a bottom perspective view of a case constituting a ventilation device according to an embodiment of the present invention.

[0040] Fig. 8 is a cross-sectional cutaway perspective view of the case taken along line 8-8 of Fig. 7.

[0041] Figure 9 is a perspective view of a bypass damper module constituting a ventilation device according to an embodiment of the present invention.

[0042] Figure 10 is an enlarged view of part A of Figure 9.

[0043] Fig. 11 is a perspective view of a bypass filter unit constituting a ventilation device according to an embodiment of the present invention.

[0044] Figure 12 is an exploded perspective view of the above bypass filter unit.

[0045] Fig. 13 is a perspective view showing the internal configuration of a ventilation device equipped with a differential pressure sensor according to an embodiment of the present invention.

[0046] Figure 14 is a perspective view showing a bypass guide with a differential pressure sensor installed.

[0047] Fig. 15 is a cross-sectional cutaway perspective view of the bypass guide cut along line 15-15 of Fig. 13.

[0048] Fig. 16 is a longitudinal cross-sectional view of a bypass guide cut along 16-6 of Fig. 13.

[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 plan perspective view of a ventilation device according to an embodiment of the present invention, FIG. 2 is a bottom perspective view of the ventilation device rotated along 2-2 of FIG. 1, FIGS. 3 and 4 are exploded perspective views showing the coupling relationship between a housing and flanges forming the ventilation device, FIG. 5 is a top view of the ventilation device with the housing and flange removed, and FIG. 6 is a bottom view of the ventilation device with the housing and flange removed.

[0051] Referring to FIGS. 1 to 6, a ventilation device (10) according to an embodiment of the present invention includes a housing (11) forming an outer shape, flanges (12) coupled to both sides of the housing, and a plurality of ventilation components accommodated inside the housing (11). Although the bottom of the ventilation device (10) is illustrated as being open for convenience of explanation in the drawing, the housing (11) closes the bottom of the ventilation device (10), and the bottom of the housing (11) covering the bottom of the ventilation device (10) may be a cover that can rotate by a hinge.

[0052] In detail, an air inlet (111) and an outside air outlet (114) are formed on one side of the left and right sides of the housing (11), and an outside air inlet (113) and an inside air outlet (112) are formed on the other side.

[0053] In addition, the flange (12) includes an air inlet flange (121) coupled to the air inlet port (111), an air discharge flange (124) coupled to the air outlet port, an air inlet flange (123) coupled to the air inlet port (113), and an air discharge flange (122) coupled to the air outlet port (112).

[0054] The above-described plurality of ventilation components include a case (13) provided inside the housing (11), a heat exchange element (16) disposed at the center of the case (13), an intake fan (14) and an exhaust fan (15) mounted on the upper surface of the case (13), a HEPA filter (17) disposed on the side of the heat exchange element (16), a pre-filter (18) disposed at the air inlet (111) and the outside air inlet (113), a main damper module (21) disposed on the side of the air inlet (111) and the outside air inlet (113), a bypass damper module (24) disposed on the side of the pre-filter (18), and a bypass filter unit (27) disposed on the outlet side of the bypass damper module (24).

[0055] In detail, the heat exchange element (16) is arranged in the center of the inside of the case (13), and is arranged in a form where the side of the heat exchange element (16) and the side of the case (13) intersect.

[0056] In addition, the intake fan (14) is disposed inside the case (13), and the outlet of the intake fan (14) is coupled to the outside air outlet (114). In addition, the exhaust fan (15) is disposed inside the case (13), and the outlet of the exhaust fan (15) is coupled to the inside air outlet (112). In addition, the intake fan (14) and the exhaust fan (15) are disposed symmetrically with respect to a line that bisects the case (13). The line that passes between the intake fan (14) and the exhaust fan (15) and bisects the case (13) is designed to pass through two opposing corners of the heat exchange element (16). Accordingly, when the ventilation device (10) is installed in one of two pieces of furniture designed to have a symmetrical structure, the supply fan (14) sucks in outdoor air and supplies it indoors, and the exhaust fan (14) sucks in indoor air and discharges it outdoors. On the other hand, when the ventilation device (10) is installed in the other piece of furniture designed to have a symmetrical structure, the intake fan (14) functions as an exhaust fan and the exhaust fan (15) functions as an intake fan.

[0057] Meanwhile, the pre-filter (18) includes an intake-side pre-filter (181) mounted on the outside air inlet (113) and an exhaust-side pre-filter (182) mounted on the inside air inlet (111).

[0058] The outdoor air that has passed through the above-mentioned intake-side pre-filter (181) is introduced into the first side of the heat exchange element (16), then passes through the second side facing the first side, and is guided to the space where the intake fan (14) is installed. Then, the outdoor air sucked by the intake fan (14) is supplied to the room through the outside air discharge port (114).

[0059] The indoor air that has passed through the exhaust side pre-filter (182) is introduced to the third side of the heat exchange element (16), then passes through the fourth side facing the third side, and is guided to the space where the exhaust fan (15) is installed. Then, the indoor air sucked in by the exhaust fan (15) is discharged to the outdoors through the exhaust outlet (112).

[0060] Here, the first side and the third side of the heat exchanger element (16) share one edge, and the second side and the fourth side of the heat exchanger element (16) share another edge. In addition, the one edge is defined as an edge that faces the other edge.

[0061] In addition, the pre-filter (7) includes an intake-side HEPA filter (171) placed on the second side of the heat exchange element (16) and an exhaust-side HEPA filter (172) placed on the fourth side of the heat exchange element (16).

[0062] Meanwhile, the main damper module (21) includes an intake-side main damper module (19) and an exhaust-side main damper module (20). The intake-side main damper module (19) is placed on an outside air supply path connecting the outside air inlet (113) and the first side of the heat exchange element (16). And, the exhaust-side main damper module (19) is placed on an inside exhaust path connecting the inside air inlet (111) and the third side of the heat exchange element (16).

[0063] In addition, the bypass damper module (24) includes an intake-side bypass damper module (22) and an exhaust-side bypass damper module (23). The intake-side bypass damper module (22) is arranged on the side of the outside air inlet (113), and the exhaust-side bypass module (923) is arranged on the side of the inside air inlet (111).

[0064] A separation space is formed between the above-mentioned external air inlet (113) and the intake-side main damper module (19), one side of the separation space is shielded by the side of the case (13) or the housing (11), and the intake-side bypass damper module (22) is arranged on the other side.

[0065] In addition, a separation space is formed between the inlet port (111) and the exhaust side main damper module (20), and one side of the separation space is shielded by the side of the case (13) or the housing (11), and the exhaust side bypass damper module (23) is arranged on the other side.

[0066] The above bypass filter unit (27) includes an intake-side bypass filter unit (25) and an exhaust-side bypass filter unit (26). The intake-side bypass filter unit (25) is arranged adjacent to the intake-side bypass damper module (22), and the exhaust-side bypass filter unit (26) is arranged adjacent to the exhaust-side bypass damper module (23).

[0067] Accordingly, the outdoor air that has passed through the intake-side bypass damper module (22) is purified while passing through the intake-side bypass filter unit (25) and then supplied indoors, and the indoor air that has passed through the exhaust-side bypass damper module (23) is purified while passing through the exhaust-side bypass filter unit (26) and then discharged outdoors. In addition, the outdoor air and indoor air that each pass through the bypass filter units (25, 26) are supplied indoors or discharged outdoors directly without passing through the heat exchange element (16).

[0068] FIG. 7 is a bottom perspective view of a case constituting a ventilation device according to an embodiment of the present invention, and FIG. 8 is a cross-sectional perspective view of the case taken along line 8-8 of FIG. 7.

[0069] Referring to FIGS. 7 and 8, a case (13) constituting a ventilation device (10) according to an embodiment of the present invention includes a bypass guide (131), an intake-side pre-filter support wall (132), an exhaust-side pre-filter support wall (133), an intake-side central wall (134), an exhaust-side central wall (135), an intake-side main damper support wall (136), an exhaust-side main damper support wall (137), and a heat exchanger support wall (138). In addition, although these components are depicted as being separated from each other in the drawing, they may be formed as a single body.

[0070] The upper surface of the case (13) shown in the drawing is a surface that is selectively shielded by a cover that is rotatably connected to the lower surface of the housing (11). That is, although the portion shielded by the cover is recognized as the upper surface in the drawing, it corresponds to the lower surface when the ventilation device (10) is installed on the ceiling.

[0071] In detail, the bypass guide (131) includes a horizontal portion (1311), a pair of vertical portions (1312) bent at both edges of the horizontal portion (1311), and a central partition wall (1317) extending in a direction perpendicular to the horizontal portion (1311) from the edge of the central portion of the horizontal portion (1311). By the central partition wall (1317), indoor air and outdoor air flowing into the ventilation device (10) are not mixed and are guided to the intake fan (14) and the exhaust fan (15), respectively.

[0072] In detail, the above bypass guide (131) is formed with an intake side bypass path (1313), an exhaust side bypass path (1314), an intake guide hole (1315), and an exhaust guide hole (1316).

[0073] The intake-side bypass flow path (1313) starts from the vertical portion (1311) formed on one edge of the bypass guide (131) and extends along the horizontal portion (1311), but extends toward the other edge of the bypass guide (131). The exhaust-side bypass flow path (1314) starts from the vertical portion (1311) formed on the other edge of the bypass guide (131) and extends along the horizontal portion (1311), but extends toward the one edge of the bypass guide (131).

[0074] The above-mentioned intake guide hole (1315) is formed on the other edge of the bypass guide (131), and the above-mentioned exhaust guide hole (1316) is formed on one edge of the bypass guide (131). That is, the above-mentioned intake guide hole (1315) and the above-mentioned exhaust guide hole (1316) are formed symmetrically with respect to a line that bisects the above-mentioned bypass guide (131) while passing through the above-mentioned central partition wall (1317).

[0075] Accordingly, the intake-side bypass flow path (1313) is connected to the intake guide hole (1315), and the exhaust-side bypass flow path (1314) is connected to the exhaust guide hole (1316). In addition, the intake-side bypass flow path (1313) and the exhaust-side bypass flow path (1314) intersect in the vertical direction at the central portion of the bypass guide (131).

[0076] For example, the intake side bypass flow path (1313) and the exhaust side bypass flow path (1314) intersect in an X shape at the center of the bypass guide (131), and one of the intake side bypass flow path (1313) and the exhaust side bypass flow path (1314) can be formed above the other.

[0077] In this way, since the intake side bypass path (1313) and the exhaust side bypass path (1314) are provided in a shape that is symmetrical to each other, a single-shaped ventilation device (10) can be easily installed in two furnitures that are designed symmetrically to each other, and a separate path conversion kit is not required.

[0078] Meanwhile, the central partition wall (1317) protruding from the center of the bypass guide (131) is formed with a length that contacts the upper and lower surfaces of the housing (11), similar to the vertical portion (1312). In addition, the central partition wall (1317) has a cross-sectional shape of approximately a triangle. In addition, a HEPA filter mounting groove (1317a) is formed on one edge and the other edge of the central partition wall (1317), and a heat exchanger mounting groove (1317b) is formed on the corner where the one edge and the other edge meet.

[0079] More specifically, the central partition wall (1317) can be described as forming an isosceles triangle cross-section, with HEPA filter mounting grooves (1317a) formed on each of two sides of equal length, and with the heat exchanger mounting grooves (1317b) formed at the corners where the two sides of equal length meet.

[0080] The intake-side pre-filter support wall (132) and the exhaust-side pre-filter support wall (133) are formed on each of the two sides of the case (13), and are formed in positions facing each other. In addition, a mounting groove (1321, 1331) is formed on one edge of the intake-side pre-filter support wall (132) and the exhaust-side pre-filter support wall (133), and one edge of the intake-side pre-filter (181) and one edge of the exhaust-side pre-filter (182) are inserted into the mounting groove (1321, 1331). The other edges of the intake-side pre-filter (181) and the exhaust-side pre-filter (182) can be inserted into and supported by a groove (not shown) formed on the inner side of the housing (11).

[0081] The above-mentioned intake-side central wall (134) is arranged at a point spaced apart from the intake-side pre-filter support wall (132) toward the center of the case (13). A HEPA filter mounting groove (1341) into which one edge of an intake-side HEPA filter (172) is fitted is formed on one side of the intake-side central wall (1344), and the HEPA filter mounting groove (1341) faces the HEPA filter mounting groove (1317a) of the central partition wall (1317). A heat exchanger mounting groove (1342) is formed on the center of the inner surface of the intake-side central wall (134), and a main damper mounting groove (1343) is formed on the other edge of the intake-side central wall (134). In addition, a bypass damper mounting groove (1344) is formed on the outer surface of the intake-side central wall (134).

[0082] The exhaust-side central wall (135) is arranged opposite the intake-side central wall (134), and the exhaust-side central wall (135) is arranged at a point spaced apart from the exhaust-side pre-filter support wall (133) toward the center of the case (12). The exhaust-side central wall (135) has a shape symmetrical with the intake-side central wall (134). That is, a HEPA filter mounting groove (1351) is formed on one side of the exhaust-side central wall (135), and the HEPA filter mounting groove (1351) faces the HEPA filter mounting groove (1317b) of the central partition wall (1317). A heat exchanger mounting groove (1352) is formed on the center of the inner surface of the exhaust-side central wall (135), and a main damper mounting groove (1353) is formed on the other edge of the exhaust-side central wall (134). In addition, a bypass damper mounting groove (1354) is formed on the outer surface of the exhaust side central wall (135).

[0083] A main damper mounting groove (1361) is formed on one edge of the main damper support wall (136) on the intake side, and the other edge is in close contact with the side surface of the housing (11). The main damper mounting groove (1361) faces the main damper mounting groove (1345) of the central wall (134) on the intake side. Accordingly, both side ends of the main damper module (19) on the intake side are fitted into and supported by the main damper mounting grooves (1343, 1361).

[0084] The exhaust-side main damper support wall (137) is arranged opposite the intake-side main damper support wall (136) and has a symmetrical shape. In addition, a main damper mounting groove (1371) is formed on one edge of the exhaust-side main damper support wall (137), and the other edge is in close contact with the side surface of the housing (11). The main damper mounting groove (1371) faces the main damper mounting groove (1352) of the exhaust-side central wall (135). Therefore, both side ends of the exhaust-side main damper module (20) are fitted into and supported by the main damper mounting grooves (1353, 1371).

[0085] The above heat exchange element support wall (138) is installed between the intake side main damper support wall (136) and the exhaust side main damper support wall (137). In addition, a heat exchange element mounting groove (1381) is formed in the inner center of the heat exchange element support wall (138).

[0086] According to this structure, the four corners of the hexahedral heat exchanger element are supported by being fitted into the heat exchanger element mounting grooves (1317b, 1342, 1381, 1352), respectively.

[0087] And, depending on whether the intake-side main damper module (19) and the intake-side bypass damper module (22) are open or closed, the outdoor air flowing in through the outside air inlet (113) is guided to one or both of the heat exchange element (16) and the intake-side bypass path (1313). And, depending on whether the exhaust-side main damper module (20) and the exhaust-side bypass damper module (23) are open or closed, the indoor air flowing in through the indoor inlet (111) is guided to one or both of the heat exchange element (16) and the exhaust-side bypass path (1314).

[0088] FIG. 9 is a perspective view of a bypass damper module constituting a ventilation device according to an embodiment of the present invention, and FIG. 10 is an enlarged view of part A of FIG. 9.

[0089] Referring to FIGS. 9 and 10, the bypass damper module (24) includes an upper bracket (241), a lower bracket (242), a pair of supporters (243) connecting the upper bracket (241) and the lower bracket (242), a first damper (244) and a second damper (245) mounted between the pair of supporters (243), a drive motor (246) driving the first and second dampers (244, 245), and an opening / closing link (247).

[0090] In detail, the driving motor (246) and the opening / closing link (247) are mounted on the upper surface of the upper bracket (241). In addition, the first rotational axis (2441), which serves as the rotational center of the first damper (244), and the second rotational axis (2451), which serves as the rotational center of the second damper (245), pass through the upper bracket (241). The first and second rotational axis (2441, 2451) are rotational axis extending from the upper surfaces of the first and second dampers (244, 245). In addition, the rotational axis (2442, 2452), which extends from the lower surfaces of the first and second dampers (244, 245), pass through the lower bracket (242).

[0091] The above opening / closing link (247) includes a first link (24710), a second link (2472), a connecting link (2473), a driving link (2474), and a transmission gear (2475).

[0092] In detail, a reduction gear module is provided inside the drive motor (246), and the rotational power of the drive motor (246) is transmitted to the reduction gear module and reduced. Then, the reduced rotational power is transmitted to a transmission gear (2475) connected to the rotational shaft of the reduction gear module.

[0093] The second link (2471) extends from the outer circumference of the first rotation axis (2441), and the second link (2472) and the driving link (2474) extend from the outer circumference of the second rotation axis (2451). The driving link (2474) extends from a point spaced upward from the second link (2472), and can extend from a point spaced at a predetermined angle in the circumferential direction of the second rotation axis (2451) from the second link (2472).

[0094] The above connecting link (2473) is a link connecting the first link (2471) and the second link (2472), and the transmission link (2475) is connected to the driving link (2474). The first link (2471) and the second link (2472) extend in opposite directions, and the connecting link (2473) connects the ends of the first and second links (2471, 2472).

[0095] By this connection structure, when a driving signal is input to the driving motor (246), the reduced rotational power of the driving motor (246) is transmitted to the transmission link (2475) to rotate the transmission link (2475). The rotational power of the transmission link (2475) is transmitted to the driving link (2474) to rotate the second rotational shaft (2451).

[0096] As the second rotation shaft (2451) rotates, the second damper (245) rotates, and at the same time, the second link (2472) rotates. When the second link (2472) rotates, the first link (2471) and the first rotation shaft (2441) rotate by the connecting link (2473). In addition, as the first rotation shaft (2441) rotates, the first damper (244) rotates together.

[0097] At this time, since the extension directions of the first link (2471) and the second link (2472) are extended in opposite directions, when the first link (2471) and the second link (2472) rotate in the first direction or the second direction, one end of the first damper (244) and one end of the second damper (245) rotate in a direction in which they become closer to each other (first direction) or move away from each other (second direction).

[0098] In detail, when the first and second dampers (244, 245) rotate in the first direction and the side ends of the first and second dampers (244, 245) meet, the inlet of the bypass passage (1313, 1314) is closed. Conversely, when the first and second dampers (244, 245) rotate in the second direction and become parallel to each other, the inlet of the bypass passage (1313, 1314) is opened to the maximum.

[0099] Here, it should be noted that the meaning that the first link (2471) and the second link (2472) extend in opposite directions does not only mean that the extension lines of the two links extend in a completely parallel state, but also includes extending in a form that intersects each other.

[0100] Fig. 11 is a perspective view of a bypass filter unit constituting a ventilation device according to an embodiment of the present invention, and Fig. 12 is an exploded perspective view of the bypass filter unit.

[0101] Referring to FIGS. 11 and 12, a bypass filter unit (27) according to an embodiment of the present invention includes a filter case (271) and a filter (272) inserted into the filter case (271).

[0102] In detail, a handle (273) is mounted on the upper or lower surface of the filter (272). The handle is a part that a user holds with his / her hand when inserting the filter (272) into or withdrawing it from the filter case (271).

[0103] In addition, a filter insertion port (2723) is formed on the upper or lower surface of the case (271), and an intake port (2711) and an exhaust port (2712) are formed on two opposing sides of the four sides of the case (271), respectively. In addition, the intake port (2711) is located on the outlet side of the bypass damper module (24).

[0104] Accordingly, when the bypass damper module (24) is opened, the outdoor air or indoor air flowing into the outside air inlet (113) or the inside air inlet (111) sequentially passes through the intake port (2711), the filter (272), and the discharge port (2712) and is then guided to the intake-side bypass path (1313) or the exhaust-side bypass path (1314).

[0105] FIG. 13 is a perspective view showing the internal configuration of a ventilation device equipped with a differential pressure sensor according to an embodiment of the present invention, FIG. 14 is a perspective view showing a bypass guide in which a differential pressure sensor is installed, FIG. 15 is a cross-sectional perspective view of the bypass guide taken along line 15-15 of FIG. 13, and FIG. 16 is a longitudinal cross-sectional view of the bypass guide taken along line 16-6 of FIG. 13.

[0106] Referring to FIGS. 13 to 16, a ventilation device (10) according to an embodiment of the present invention is equipped with a differential pressure sensor (50) that detects a pressure difference between the inlet and outlet of a HEPA filter (17).

[0107] In detail, the differential pressure sensor (50) is mounted on the case (13) constituting the ventilation device (10), and specifically, is mounted on the bypass guide (131) constituting the case (13). More specifically, the differential pressure sensor (50) can be mounted on the central partition wall (1317) extending from the center of the inner edge of the bypass guide (131).

[0108] As described above, the central partition wall (1371) may have a triangular-shaped plan, and the HEPA filter mounting grooves (1317a) are formed on each of the two adjacent surfaces, and the heat exchanger mounting grooves (1317b) are formed at the vertex where the two surfaces meet.

[0109] A differential pressure sensor mounting groove (1317c) in which the differential pressure sensor (50) is mounted is formed in a recessed manner on the upper surface of the central partition wall (1317). In addition, the differential pressure sensor mounting groove (1317c) may be formed at a point spaced a predetermined distance rearward from the HEPA filter mounting groove (1317a).

[0110] In addition, the differential pressure sensor mounting groove (1317c) is formed on the side of the HEPA filter mounting groove (1317a) where the intake side HEPA filter (171) is mounted and the HEPA filter mounting groove (1317a) where the exhaust side HEPA filter (172) is mounted. In addition, the differential pressure sensor (50) is respectively installed in each differential pressure sensor mounting groove (1317c).

[0111] Meanwhile, a detection path (or detection hole) is formed inside the central partition wall (1317) to detect the pressure difference between the inlet and outlet of the HEPA filter (17). In detail, the detection path is formed with an inlet detection path through which inlet air of the HEPA filter (17) flows in and an outlet detection path through which outlet air of the HEPA filter (17) flows in.

[0112] The above inlet-side detection path includes a vertical path (1317d) extending a predetermined length in the height direction (or vertical length direction) of the central partition wall (1317), and a horizontal path (1317e) extending a predetermined length in the width direction (or horizontal direction) of the central partition wall (1317).

[0113] In detail, the vertical flow path (1317d) includes an inlet-side vertical flow path (1317d1) and an outlet-side vertical flow path (1317d2) that extend a predetermined length in the longitudinal direction of the central partition wall (1317) from the bottom of the differential pressure sensor mounting groove (1317c). The inlet-side vertical flow path (1317d1) and the outlet-side vertical flow path (1317d2) extend parallel to each other and can extend to a point adjacent to the lower end of the central partition wall (1317).

[0114] For reference, it should be noted that the end of the central partition wall (1317) adjacent to the end of the vertical flow path (1317d) is defined as the lower end in the drawing for convenience of explanation. In reality, if the ventilation device (10) is mounted on an indoor ceiling, the lower end of the central partition wall (1317) may be defined as the upper end because it faces the ceiling.

[0115] The above horizontal flow path (1317e) includes a plurality of inlet-side horizontal flow paths (1317e1) and a plurality of outlet-side horizontal flow paths (1317e2). The plurality of inlet-side horizontal flow paths (1317e1) and the plurality of outlet-side horizontal flow paths (1317e2) may be formed to be spaced apart by a predetermined distance in the height direction of the central partition wall (1317).

[0116] One end of the plurality of inlet-side horizontal channels (1317e1) is formed at one edge of the intake-side HEPA filter mounting groove (1317a), and the other end is connected to the inlet-side vertical channel (1317d1). In addition, one end of the plurality of outlet-side horizontal channels (1317e2) is formed at one edge of the exhaust-side HEPA filter mounting groove (1317a), and the other end is connected to the outlet-side vertical channel (1317d2).

[0117] For example, the plurality of inlet-side horizontal flow paths (1317e1) may be formed at a lowest point (A) spaced upward from the bottom of the central partition wall (1317), a highest point (C) spaced downward from the top of the central partition wall (1317), and a midpoint (B) between the lowest point (A) and the highest point (C), respectively. Similarly, the plurality of outlet-side horizontal flow paths (1317e2) may be formed at a lowest point (a) spaced upward from the bottom of the central partition wall (1317), a highest point (c) spaced downward from the top of the central partition wall (1317), and a midpoint (b) between the lowest point (A) and the highest point (C), respectively.

[0118] The two lowest points (A, a) are formed on the same plane, the two uppermost points (C, c) are also formed on the same plane, and each of the two intermediate points (B, b) is formed on the same plane.

[0119] Meanwhile, the differential pressure sensor (50) includes a sensor body (51) and a pair of detection ports (52) extending from the sensor body (51). The pair of detection ports (52) includes an inlet port (521) inserted into the inlet-side vertical flow path (1317d1) and an outlet port (522) inserted into the outlet-side vertical flow path (1317d2).

[0120] The pressure of air flowing in through the inlet-side horizontal passages (1317e1) is detected at the inlet port (521), and the pressure of air flowing in through the outlet-side horizontal passages (1317e2) is detected at the outlet port (522). In addition, the difference between the pressure of air flowing in through the inlet port (521) and the pressure of air flowing in through the outlet port (522) is detected inside the sensor body (50).

[0121] And, since the plurality of horizontal channels are arranged between the top and bottom of the HEPA filter (17), even if dust accumulates in a specific area over the entire surface of the HEPA filter (17), it can be easily detected. For example, when a lot of dust accumulates in the lower area of ​​the HEPA filter (17), the differential pressure sensor (50) detects the average pressure of the air flowing in from the plurality of inlet-side channels and the average pressure of the air flowing in from the plurality of outlet-side channels. And, the differential pressure sensor (50) transmits the detected value to the control unit of the ventilation device (10).

[0122] In addition, the control unit of the ventilation device (10) cannot know in which area of ​​the HEPA filter (17) dust is concentrated and obstructs the air flow, but can accurately detect that the pressure difference between the inlet and outlet of the HEPA filter (17) exceeds a set level. As a result, the control unit of the ventilation device (10) can accurately determine the replacement time of the HEPA filter based on the detection value transmitted from the differential pressure sensor (50) and output a notification signal for filter replacement.

Claims

1. A housing including an inlet, an outlet, an outside air inlet, and an outside air outlet; A case accommodated inside the above housing; An intake fan mounted inside the case, the exhaust port of which is connected to the external exhaust port; An exhaust fan mounted inside the case, the exhaust fan having an outlet connected to the exhaust outlet; A hexahedral heat exchanger element mounted inside the case and formed by the intersection of an indoor air path and an outdoor air path; A filter installed at each point where outdoor air flows through the heat exchanger and at each point where indoor air flows through the heat exchanger; and Including a differential pressure sensor provided to detect the pressure difference between the inlet and outlet of the above filter, The above case is, A partition wall extending from the upper surface of the housing to the lower surface thereof and supporting one edge of the heat exchanger element, The above partition wall, A heat exchanger mounting groove that supports one edge of the above heat exchanger, A filter mounting groove supporting one side of the above filter, Includes a pressure sensing passage for detecting the pressure difference between the inlet and outlet of the above filter, The above pressure sensing euro is, A vertical path extending in the length direction of the partition wall from the rear of the filter mounting groove and connected to the differential pressure sensor; It includes a plurality of horizontal channels extending horizontally toward the vertical channel from one edge and the other edge of the filter mounting groove, The above multiple horizontal channels are, A ventilation device characterized in that it is formed with a predetermined gap between the upper and lower parts of the partition wall.

2. In paragraph 1, The above vertical flow is, An inlet vertical path through which air flows into the inlet side of the above filter, It includes a vertical flow path on the outlet side through which air from the outlet side of the above filter is introduced, The above multiple horizontal channels are, A plurality of inlet-side horizontal channels connected to the above inlet-side vertical channels, A ventilation device comprising a plurality of horizontal outlet channels connected to the vertical outlet channels.

3. In paragraph 2, One end of each of the plurality of inlet-side horizontal channels is formed at one end of the filter mounting groove, and the other end is connected to the inlet-side vertical channel, A ventilation device characterized in that one end of each of the plurality of horizontal outlet channels is formed at the other end of the filter mounting groove, and the other end is connected to the vertical outlet channel.

4. In paragraph 3, A differential pressure sensor mounting groove in which the differential pressure sensor is mounted is formed sunken into the upper surface of the above partition wall, The above inlet-side vertical flow path and the outlet-side vertical flow path are connected to the bottom of the differential pressure sensor mounting groove, The above differential pressure sensor, A sensor body that is installed in the above differential pressure sensor mounting groove, comprising a sensing port extending from the above sensor body; The above detection port is, An inlet port inserted into the vertical flow path on the inlet side, A ventilation device comprising an outlet port inserted into the vertical flow path on the outlet side.

5. In paragraph 4, The above-mentioned inlet and the above-mentioned external outlet are formed on one side of the housing, The above-mentioned air outlet and the above-mentioned external air inlet are formed on the other side of the housing, The above-mentioned inlet is formed at a position facing the above-mentioned outside inlet, A ventilation device characterized in that the above-mentioned exhaust outlet is formed at a position facing the above-mentioned outside air exhaust outlet.

6. In paragraph 5, The above case is, An intake-side bypass path that guides outdoor air flowing into the above-mentioned outdoor air inlet to the space where the intake fan is located, bypassing the above-mentioned heat exchange element; A ventilation device including an exhaust side bypass path that guides indoor air flowing into the above-mentioned intake port to a space where the exhaust fan is placed, bypassing the above-mentioned heat exchange element.

7. In paragraph 6, The above case is, An intake guide hole formed at an edge adjacent to the above-mentioned external air outlet and communicating with the space where the intake fan is placed; It includes an exhaust guide hole formed on an edge adjacent to the above exhaust outlet and communicating with the space where the exhaust fan is placed, The outlet of the above intake side bypass flow path is connected to the above intake guide hole, A ventilation device characterized in that the outlet of the above exhaust side bypass path communicates with the above exhaust guide hole.

8. In paragraph 7, The above intake side bypass path and the above exhaust side bypass path are, A ventilation device characterized in that it has a symmetrical shape centered on a dividing plane that passes between one side and the other side of the housing and bisects the case.

9. In paragraph 8, The inlet of the above intake side bypass path is formed at a point spaced apart from the exhaust guide hole in a direction closer to the outside air inlet, A ventilation device characterized in that the inlet of the exhaust side bypass path is formed at a point spaced apart from the intake guide hole in a direction approaching the intake inlet.

10. In paragraph 4, The above intake side bypass path is, A first portion extending from the inlet of the intake side bypass path toward the exhaust guide hole and then bending to extend along the edge of the exhaust guide hole; A second part is bent at the end of the first part and communicates with the intake guide hole, The above exhaust side bypass path is, A third part extending from the inlet of the exhaust side bypass path toward the intake guide hole and then bending to extend along the edge of the intake guide hole; A ventilation device including a fourth part that is bent at an end of the second part and communicates with the exhaust guide hole.

11. In paragraph 10, The second part intersects the fourth part while passing through the upper or lower side of the fourth part, A ventilation device characterized in that the above dividing surface passes through the point where the second part and the fourth part intersect.

12. In paragraph 9, An intake-side bypass damper module placed on the inlet side of the above intake-side bypass path, A ventilation device further comprising an exhaust side bypass damper module placed on the inlet side of the exhaust side bypass path.

13. In paragraph 12, An intake-side bypass filter unit placed between the inlet of the intake-side bypass flow path and the intake-side bypass damper module, A ventilation device further comprising an exhaust-side bypass filter unit placed between the inlet of the exhaust-side bypass path and the exhaust-side bypass damper module.

14. In paragraph 13, An intake-side pre-filter installed in the above-mentioned outside air inlet, A ventilation device further comprising an exhaust side pre-filter installed at the above-mentioned intake port.

15. In paragraph 14, The above filter is, An intake side HEPA filter disposed between the above heat exchange element and the outside air discharge port, Including an exhaust side HEPA filter disposed between the above heat exchange element and the exhaust outlet, The above filter mounting portion, A first mounting portion on which one side of the above-mentioned intake-side HEPA filter is mounted, A ventilation device including a second mounting portion on which one side of the exhaust side HEPA filter is mounted.

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