Ventilation apparatus

Abstract

The present invention exhausts, to the outside of a building, air in which heat, moisture, odor and the like inside the building are mixed, and comprises: a lower Venturi part communicating with the inside of the building so as to allow air inside the building to flow therein; and an upper Venturi part exposed on the outside of the building, and fixed to the upper portion of the lower Venturi part, which is the direction toward the outside of the building so as to allow the air flowing into the lower Venturi part to flow in the direction orthogonal to the lower Venturi part, thereby exhausting the air to the outside of the building, wherein the upper Venturi part allows outdoor air generated outside the building to flow therein and increases the flow speed of the outdoor air.

Description

ventilation system

[0001] The present invention relates to a ventilation device, and more specifically, to a ventilation device that exhausts air containing heat, moisture, and odors inside a building to the outside of the building.

[0002]

[0003] Generally, air flow is a concept that indicates how freely air can flow, and in a building, efficient air flow helps keep the air inside the building clean and comfortable.

[0004] To this end, various exhaust technologies are used to optimize the flow of air inside the building, keeping the air inside the building clean and comfortable.

[0005] These exhaust technologies are broadly categorized into ventilation systems, air purification systems, exhaust gas aftertreatment technologies, and scrubbers.

[0006] First, the ventilation system is a system that improves health and productivity by replacing the air inside a building with fresh outside air.

[0007] Air purification systems are technologies that detect and remove harmful substances emitted from factories and vehicles, and play a major role in reducing air pollution.

[0008] Exhaust gas aftertreatment technology is a technology that reduces air pollution by treating exhaust gases generated from automobiles or industrial facilities, and uses catalytic converters and particle filters.

[0009] A scrubber is a device that removes harmful substances from exhaust gases through chemical reactions or water absorption, and is mainly used to purify the air in coal-fired power plants.

[0010] Among these, roof fans are typically used in ventilation systems.

[0011] A roof fan is an air circulation device installed on the rooftops of buildings, apartments, factories, warehouses, etc. to increase the flow of air in the roof space of a house or building.

[0012] Roof fans efficiently move air to remove heat, remove moisture and odors, and improve air quality inside buildings, apartments, factories, warehouses, etc.

[0013] These roof fans serve to smoothly circulate the air inside a building, and are broadly classified into powered and non-powered fans depending on their purpose.

[0014] Power fans are forced air supply fans (OA; OUTDOOR AIR) and exhaust fans (EA; EXHAUST AIR) required for ventilation, and can control the amount of ventilation inside buildings such as factories and warehouses. Therefore, they can control indoor ventilation by ensuring forced ventilation according to the seasons of spring, summer, fall, and winter, or by systematically adjusting the amount of ventilation inside the building as needed according to the environment and temperature inside the factory or warehouse building.

[0015] In addition, the power fan can be turned on or off depending on the temperature change due to seasonal changes, the heat and steam in the workplace, welding fumes, and the concentration of harmful gases and turbidity inside the building, and automatic and manual dampers (VD) can be attached as a separate order specification to control the ventilation volume inside the factory and prevent loss of heating and cooling.

[0016] In addition, the power fan can improve the working environment inside buildings such as factories and warehouses by forcibly exhausting the stale air inside the building, allowing fresh air from outside to flow into the building.

[0017] However, power fans require a significant amount of energy when operating, which increases maintenance costs, may generate noise due to excessive power and motor rotation speed, and are difficult to install, repair, and move due to their heavy weight.

[0018] Although non-powered fans can solve the problems pointed out in the above-mentioned power fans to some extent, they cannot guarantee a uniform and stable ventilation effect because they are variable depending on the temperature inside the building, the wind speed of the outside air, and the environment inside and outside the building. In particular, there is a problem that the ventilation function is very weak in low-pressure conditions.

[0019] For the above reasons, the field is seeking ways to reduce maintenance costs and noise and ensure even ventilation, but has not yet achieved satisfactory results.

[0020]

[0021] The present invention, which aims to solve the problems described above, provides a ventilation device that can reduce maintenance costs and noise and ensure a uniform ventilation effect.

[0022] The above-described objects and other objects, advantages and features of the present invention, and methods for achieving them will become clear with reference to the embodiments described in detail below together with the attached drawings.

[0023]

[0024] According to an embodiment of the present invention for achieving the above-described object, a ventilation device includes a lower venturi part communicating with the interior of a building and allowing the air inside the building to flow in; and an upper venturi part exposed to the exterior of the building and fixed at an upper portion of the lower venturi part toward the exterior of the building, allowing the air introduced into the lower venturi part to flow in a direction perpendicular to the lower venturi part and exhausting the air to the exterior of the building, wherein the upper venturi part allows outside air generated outside the building to flow in and increases the flow velocity of the outside air.

[0025] The lower venturi section includes an outer housing having a cylindrical shape and forming a body; an inner housing having a cylindrical shape and inserted into the inner housing; a ventilation fan fixed to a lower portion of the inner housing in the direction of the building's interior and configured to suck in air from inside the building and cause the air to flow to the outer housing and the inner housing; and a control unit electrically connected to the ventilation fan and configured to control the operation of the ventilation fan.

[0026] The outer housing and the inner housing are formed in a shape in which the circumference becomes narrower and then wider as the air flows in the direction in which the air flows.

[0027] The inner housing includes a first casing fixed to the inside of the outer housing while being spaced apart from the inner surface of the outer housing, and a second casing fixed to the inside of the first casing while being spaced apart from the inner surface of the first casing, and a plurality of gear teeth are arranged in the direction in which the upper venturi part is arranged in the first casing and the second casing.

[0028] The above ventilation fan includes a fan fixing part fixed to the lower portion of the second casing; and a propeller rotatably fixed to the lower portion of the fan fixing part.

[0029] The upper venturi part includes a first fluid part fixed to the upper portion of the lower venturi part; and a second fluid part rotatably arranged inside the first fluid part.

[0030] The first fluid section comprises: a lower panel formed of a thin panel and having a through hole formed therein that communicates with the lower venturi section; a first dome section fixed to the upper surface of the lower panel and protruding upward in a hemispherical shape; an upper panel formed of a thin panel and spaced upward from the lower panel by a distance; and a second dome section fixed to the lower surface of the upper panel and protruding downward in a hemispherical shape.

[0031] The second fluid section is disposed between the lower panel and the upper panel.

[0032] In the first dome section above, an exhaust port communicating with the through hole is formed on the upper surface.

[0033] Inside the first dome section, an axial fixing section is fixed, which is exposed to the outside through the exhaust port and to which the second fluid section is rotatably fixed.

[0034] The second flow section includes a wind vane rotatably fixed to the first flow section and rotating in the direction of the flow of the outside air; a pair of curved portions arranged on each side of the wind vane and each protruding in a semicircular cross-section in a direction facing each other; and a spacing member arranged between the pair of curved portions, penetrating the wind vane, and maintaining a spacing between the pair of curved portions.

[0035]

[0036] According to the present invention, a plurality of sawtooth portions are arranged in the direction in which the upper venturi portion is arranged in the first casing and the second casing, so that there is an effect of preventing the generation of eddies in the process in which the air inside the building flowing inside the inner housing flows from the lower venturi portion toward the upper venturi portion.

[0037] The ventilation fan has the effect of further improving the air intake performance inside the building, along with the venturi effect of the lower and upper venturi sections.

[0038] The outer housing and the inner housing are formed in a shape in which the circumference thereof becomes narrower and then wider from one end opposite to the direction in which the outer housing is arranged to the other end in the direction in which the outer housing is arranged, so that the outer housing and the inner housing can increase the speed of air flowing into the inside of the outer housing and the inner housing by the Venturi effect, and as the speed of the air inside the outer housing and the inner housing accelerates, a negative pressure lower than the surrounding atmospheric pressure is generated by the orifice principle, so that the air inside the building around the outer housing and the inner housing can be quickly introduced into the inside of the outer housing and the inner housing.

[0039] The rotating shaft rotates the second fluid section by the outside air to exhaust the air, and the outside air can only exhaust when the wind has a certain strength, for example, a wind that is greater than the rotational resistance according to the fixed strength of the rotating shaft. Therefore, the exhaust force is generated only when the rotating shaft continues to rotate. Compared to existing ventilation devices that have a high probability of failure due to continuous operation by power, it has the effect of effectively reducing maintenance costs and noise.

[0040] The negative pressure sensor detects negative pressure generated in the first and second flow sections and can control the speed of the ventilation fan according to the level of negative pressure, thereby effectively reducing the power energy consumption required to operate the ventilation fan.

[0041] In addition, when outside air is introduced into the upper venturi section, the air introduced into the lower venturi section flows in a perpendicular direction, thereby effectively preventing the air from flowing back into the upper venturi section.

[0042]

[0043] Figures 1 and 2 are schematic diagrams showing the installed state of a ventilation device according to one embodiment of the present invention.

[0044] Figure 3 is a cross-sectional view showing a ventilation device according to one embodiment of the present invention.

[0045] Figure 4 is an exploded perspective view of a lower venturi section according to one embodiment of the present invention.

[0046] Fig. 5 is a cross-sectional view showing a lower venturi section according to one embodiment of the present invention.

[0047] Figure 6 is an exploded perspective view showing an upper venturi section according to one embodiment of the present invention.

[0048] Figure 7 is a bottom exploded perspective view showing an upper venturi section according to one embodiment of the present invention.

[0049] Fig. 8 is a side view showing a first fluid section of an upper venturi section according to one embodiment of the present invention.

[0050] Figure 9 is a plan view showing a second fluid section of an upper venturi section according to one embodiment of the present invention.

[0051] Fig. 10 is a cross-sectional view showing an upper venturi section according to one embodiment of the present invention.

[0052] Fig. 11 is a plan view showing the operating state of a second fluid section according to another embodiment of the present invention.

[0053] Fig. 12 is a cross-sectional view showing the operating state of a ventilation device according to one embodiment of the present invention.

[0054]

[0055] The embodiments of the present invention are provided to more completely explain the present invention to those skilled in the art, and the following embodiments can be modified in many different forms, and the scope of the present invention is not limited to the following embodiments. Rather, these embodiments are provided to more faithfully and completely convey the spirit of the present invention to those skilled in the art. In addition, each component in the drawings below is exaggerated for convenience and clarity of description, and like numbers refer to like elements in the drawings. As used herein, the term "and / or" includes any one of the listed items and any combination of one or more of the listed items.

[0056] The terminology used herein is for the purpose of describing particular embodiments and is not intended to limit the invention.

[0057] As used herein, the singular forms may include the plural forms unless the context clearly dictates otherwise. Furthermore, as used herein, the words "comprise" and / or "comprising" specify the presence of stated features, numbers, steps, operations, elements, components, and / or groups thereof, but do not preclude the presence or addition of one or more other features, numbers, operations, elements, components, and / or groups thereof.

[0058] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings.

[0059] FIG. 1 and FIG. 2 are schematic diagrams showing an installed state of a ventilation device according to an embodiment of the present invention, FIG. 3 is a cross-sectional view showing a ventilation device according to an embodiment of the present invention, FIG. 4 is an exploded perspective view of a lower venturi part according to an embodiment of the present invention, FIG. 5 is a cross-sectional view showing a lower venturi part according to an embodiment of the present invention, FIG. 6 is an exploded perspective view showing an upper venturi part according to an embodiment of the present invention, FIG. 7 is a bottom exploded perspective view showing an upper venturi part according to an embodiment of the present invention, FIG. 8 is a side view showing a first flow part of an upper venturi part according to an embodiment of the present invention, FIG. 9 is a plan view showing a second flow part of an upper venturi part according to an embodiment of the present invention, FIG. 10 is a cross-sectional view showing an upper venturi part according to an embodiment of the present invention, and FIG. 11 is a plan view showing an operating state of a second flow part according to another embodiment of the present invention.

[0060] Meanwhile, the ventilation device (10) of the present invention can be installed on the ceiling of a building as shown in FIG. 1 to discharge polluted air inside the building to the outside of the building, and can be installed in the duct space of the building as shown in FIG. 2 to discharge polluted air inside the building in conjunction with the ventilation device of each floor or each area.

[0061] For the convenience of explanation of the present invention, the following description is based on a structure installed on the ceiling of a building.

[0062] Referring to FIGS. 1 and 3 to 5, a ventilation device (10) according to one embodiment of the present invention that exhausts air containing heat, moisture, and odor inside a building to the outside of the building includes a lower venturi section (100) and an upper venturi section (200).

[0063] The lower venturi section (100) is connected to the interior of the building and allows air from inside the building to flow in, and protrudes into the interior of the building.

[0064] That is, the lower venturi section (100) protrudes into the interior of the building, so that it can easily inhale air mixed with heat, moisture, and odor formed inside the building.

[0065] This lower venturi section (100) includes an outer housing (110), an inner housing (120), a ventilation fan (130), and a control section (140).

[0066] The outer housing (110) is formed in a cylindrical shape and forms the body of the outer housing (110).

[0067] The inner housing (120) is formed in a cylindrical shape and is inserted into the inside of the outer housing (110).

[0068] As shown in FIG. 5, the outer housing (110) and the inner housing (120) are formed in a shape in which the circumference becomes narrower and then wider from one end opposite to the direction in which the air flows, that is, the direction in which the outer housing (110) is arranged, to the other end in the direction in which the outer housing (110) is arranged.

[0069] That is, the outer housing (110) and the inner housing (120) can increase the speed of air flowing into the inner housing (110) and the outer housing (110) by the Venturi effect.

[0070] Due to this, as the air velocity inside the outer housing (110) and inner housing (120) accelerates, a negative pressure lower than the surrounding atmospheric pressure is generated by the orifice principle, so that the surrounding air, i.e., the air inside the building around the outer housing (110) and inner housing (120), can quickly flow into the inside of the outer housing (110) and inner housing (120).

[0071] This inner housing (120) includes a first casing (121) and a second casing (123).

[0072] The first casing (121) is fixed to the inside of the outer housing (110) in a state spaced apart from the inner surface of the outer housing (110).

[0073] And, the lower end of the first casing (121) is fixed in a state of protruding from the lower end of the outer housing (110).

[0074] Due to this, the flow path of air inside the building can be effectively guided along the outer surface of the first casing (121) protruding from the outer housing (110).

[0075] The second casing (123) is fixed to the inside of the first casing (121) while being spaced apart from the inner surface of the first casing (121).

[0076] That is, the outer housing (110) and the first casing (121) and the second casing (123) are fixed in a spaced apart state from each other, so that air can easily flow between the outer housing (110) and the first casing (121) and the first casing (121) and the second casing (123).

[0077] And, the lower part of the second casing (123) is fixed in a state of protruding from the lower part of the first casing (121).

[0078] Due to this, the flow path of air inside the building can be effectively guided along the outer surface of the second casing (123) protruding from the first casing (121).

[0079] Meanwhile, a plurality of gear teeth (122) are arranged in the direction in which the upper venturi part (200) is arranged in the first casing (121) and the second casing (123).

[0080] These teeth (122) prevent eddies from being generated when the air inside the building flowing inside the inner housing (120) flows from the lower venturi section (100) toward the upper venturi section (200).

[0081] Due to this, the exhaust effect of air flowing into the inner housing (120) can be maintained more stably, and noise generated in the process of air flowing into the inner housing (120) can be minimized.

[0082] Meanwhile, the outer housing (110), the first casing (121), and the second casing (123) can be joined to each other by welding.

[0083] The ventilation fan (130) is fixed to the lower part of the inner housing (120) toward the inside of the building, and sucks in air inside the building and causes the air to flow to the outer housing (110) and the inner housing (120).

[0084] Specifically, the ventilation fan (130) receives signals and power from the power supply and control unit (140) and rotates to suck in air inside the building.

[0085] This ventilation fan (130) is composed of a fan fixing part (131) and a propeller (132).

[0086] The fan fixing part (131) is fixed to the lower part of the second casing (123), and the propeller (132) is rotatably fixed to the lower part of the fan fixing part (131).

[0087] This ventilation fan (130) can effectively induce the air inside the building into the interior of the outer housing (110) and the inner housing (120).

[0088] In particular, the ventilation fan (130) can further improve the air intake performance inside the building together with the venturi effect of the lower venturi section (100) and the upper venturi section (200) described below.

[0089] The control unit (140) is electrically connected to the ventilation fan (130) to control the operation of the ventilation fan (130), and can detect pressure within the device, control the speed of the ventilation fan (130), and turn the ventilation fan (130) ON / OFF.

[0090] Additionally, the control unit (140) may be formed of a negative pressure sensor.

[0091] The negative pressure sensor can detect negative pressure generated in the first fluid section (210) and the second fluid section (220) and control the speed of the ventilation fan (130) according to the level of negative pressure.

[0092] Due to this, the power energy consumption for operating the ventilation fan (130) can be effectively reduced.

[0093] Referring to FIGS. 1 and 3 and FIGS. 6 to 9, the upper venturi part (200) is exposed to the outside of the building and is fixed to the upper part of the lower venturi part (100) facing the outside of the building.

[0094] Due to this, outside air, which is the natural wind from outside the building, flows through the upper venturi section (200).

[0095] And the upper venturi part (200) causes the air introduced into the lower venturi part (100) to flow in a direction perpendicular to the lower venturi part (100), thereby exhausting the air introduced into the lower venturi part (100) to the outside of the building.

[0096] In particular, the upper venturi section (200) draws in outside air, which is natural wind generated outside the building, and increases the flow speed of the outside air.

[0097] That is, as the flow rate of the outside air flowing into the upper venturi part (200) accelerates, a negative pressure lower than the surrounding atmospheric pressure is generated by the orifice principle, so that the surrounding air, that is, the air inside the building flowing into the lower venturi part (100), is sucked into the upper venturi part (200), and as a result, the air is exhausted to the outside along with the outside air flowing into the upper housing.

[0098] Due to this, the ventilation device (10) of the present invention can effectively reduce maintenance costs and noise by eliminating the driving device using power such as a motor.

[0099] This upper venturi section (200) includes a first fluid section (210) and a second fluid section (220).

[0100] Referring to FIG. 8, the first fluid part (210) is fixed to the upper part of the lower venturi part (100) and includes a lower panel (211), a first dome part (213), an upper panel (216), and a second dome part (217).

[0101] The lower panel (211) is formed of a thin panel and is connected to the lower venturi section (100) by a lower panel (212).

[0102] And, the lower venturi part (100) is fixed to the lower surface of the lower panel (211), and the remaining area except the area where the lower venturi part (100) is fixed is fixed to the roof of the building in a state where it is hung on the exterior of the building, for example, the roof.

[0103] That is, since the lower panel (211) is hung over the roof of the building, the lower venturi section (100) fixed to the lower panel can be firmly fixed to the building.

[0104] The first dome portion (213) is fixed to the upper surface of the lower panel (211) and protrudes upward in a hemispherical shape.

[0105] An exhaust port (214) communicating with the lower panel (212) is formed on the upper surface of this first dome portion (213).

[0106] The exhaust port (214) is connected to the lower panel (212) of the lower panel (211), so that the air inside the building that is introduced into the lower venturi section through the lower panel (212) and the exhaust port (214) can easily flow between the upper panel (216) and the lower panel (211).

[0107] Additionally, an axis fixing part (215) is fixed inside the first dome part (213).

[0108] The shaft fixing part (215) is exposed to the outside through the exhaust port (214), and the second moving part (220) described below is rotatably fixed thereto.

[0109] That is, the second fluid part (220) can be rotatably fixed inside the first fluid part (210) via the shaft fixing part (215).

[0110] This shaft fixing part (215) can be joined to the upper inner surface of the first dome part (213) by welding.

[0111] The upper panel (216) is made of a thin panel and is spaced upwardly at a distance from the lower panel (211).

[0112] And, unlike the lower panel (211), the upper panel (216) has a structure that does not have the same configuration as the lower panel (212).

[0113] Due to this, the upper panel (216) can protect the device from rain and snow that occur depending on weather conditions such as rainy or snowy weather.

[0114] These upper panels (216) and lower panels (211) are supported by a support member (230).

[0115] The second dome portion (217) is fixed to the lower surface of the upper panel (216) and protrudes downward in a hemispherical shape.

[0116] Accordingly, as shown in Fig. 8, the first dome portion (213) and the second dome portion (217) cause the outside air blowing from outside the building to increase in velocity and decrease in pressure at the narrowest part of the throat by the venturi structure.

[0117] Accordingly, as the outside air speed passing through the first dome section (213) and the second dome section (217) accelerates, a negative pressure lower than the surrounding atmospheric pressure is generated by the orifice principle, so that the surrounding air, i.e., the air inside the building that has been introduced into the lower venturi section (100), can be quickly introduced between the first dome section (213) and the second dome section (217).

[0118] Due to this, as shown in Fig. 12, the air introduced into the interior of the lower venturi section (100) can flow in a orthogonal direction by the first flow section (210).

[0119] Referring to FIGS. 7 and 9, the second fluid part (220) is rotatably arranged inside the first fluid part (210), and is specifically arranged between the lower panel (211) and the upper panel (216) of the first fluid part (210).

[0120] And, the second fluid part (220) rotates according to the direction of the wind blowing from outside the building.

[0121] This second fluid part (220) includes a wind vane (221), a curved part (224), and a gap maintaining part (225).

[0122] The wind vane (221) is rotatably fixed to the first moving part (210), specifically the shaft fixing part (215), and rotates according to the flow direction of the outside air, i.e., the wind direction.

[0123] Specifically, the wind vane (221) is composed of a rotation axis (222) and an arrow vane (223).

[0124] The rotation axis (222) is rotatably fixed to the shaft fixing member (215) and rotates when the wind hits the arrow feather (223).

[0125] And, the rotation shaft (222) is exhausted by rotating the second fluid part (220) by external air, so that the exhaust function can be performed only by the external air wind having a specific strength, for example, a wind greater than the rotational resistance according to the fixed strength of the rotation shaft (222).

[0126] That is, the ventilation device (10) of the present invention operates only when an external wind force of a certain strength or greater is generated.

[0127] Accordingly, the ventilation device (10) of the present invention generates exhaust power only when the rotating shaft (222) is continuously rotated, and thus, compared to the existing ventilation device (10) that has a high probability of failure due to continuous operation by power, maintenance costs and noise can be effectively reduced.

[0128] And, as illustrated in FIG. 10, the upper and lower surfaces of the wind vane (221) are formed in shapes corresponding to the protruding surfaces of the first dome portion (213) and the second dome portion (217), respectively, and the first dome portion (213) and the second dome portion (217) are arranged at a distance from the wind vane (221).

[0129] Due to this, the wind vane (221) can rotate easily without interference with the first dome part (213) and the second dome part (217).

[0130] The curved portion (224) is formed in a pair and is positioned on both sides of the wind vane (221) as the center, and each protrudes in a semicircular shape in a cross-section in a direction facing each other.

[0131] Accordingly, a pair of curved sections (224) together with the first dome section (213) and the second dome section (217) of the first fluid section (210) cause the outside air blowing from outside the building to increase in velocity and decrease in pressure at the narrowest part of the throat by the venturi structure.

[0132] Accordingly, as the outside air speed passing through the pair of curved sections (224) of the ring is further accelerated, a negative pressure lower than the surrounding atmospheric pressure is generated by the orifice principle, so that the surrounding air, i.e., the air inside the building that has been introduced into the lower venturi section (100), can be quickly introduced between the pair of curved sections (224) and the first dome section (213) and the second dome section (217).

[0133] That is, the ventilation device (10) of the present invention can more effectively generate a pressure lower than atmospheric pressure in the vertical and horizontal directions due to the first dome portion (213) and second dome portion (217) in the vertical direction and a pair of curved portions (224) in the horizontal direction.

[0134] In addition, the ventilation device (10) of the present invention can reduce power energy consumption and maintenance costs compared to a power-driven roof fan that must be constantly operated by electricity to perform exhaust operation due to the venturi structure of the lower venturi section (100) and the upper venturi section (200).

[0135] And, when outside air is introduced into the upper venturi section (200), the air introduced into the lower venturi section (100) flows in a perpendicular direction, thereby effectively preventing the air from flowing back into the upper venturi section (200).

[0136] The spacing member (225) is positioned between a pair of curved portions (224) penetrating the wind vane (221) and maintains the spacing between the pair of curved portions (224).

[0137] Due to this, the gap maintenance member (225) can firmly fix the wind vane (221) and the curved portion (224) so ​​that they are not disturbed even when strong external air flows in between the lower panel (211), the upper panel (216), and the curved portion (224).

[0138] Meanwhile, the spacing maintenance part (225') according to another embodiment of the present invention can selectively vary the spacing between a pair of curved parts (224) as illustrated in FIG. 11.

[0139] That is, the spacing member (225') can easily adjust the distance between a pair of curved portions (224), so that the curved portions (224) can be used in accordance with the usage environment, such as in a windy area or the amount of air exhausted inside a building.

[0140] Hereinafter, the preferred operating relationship of the present invention will be described in detail with reference to the attached drawings.

[0141] Figure 12 is a cross-sectional view showing the operating state of a ventilation device (10) according to one embodiment of the present invention.

[0142] First, the present invention is composed of a lower venturi part (100) and an upper venturi part (200), and the lower venturi part (100) and the upper venturi part (200) are connected to each other.

[0143] And, the lower venturi part (100) is placed inside the building, and the upper venturi part (200) is placed outside the building.

[0144] When outside air, which is natural wind from outside the building, is introduced through the upper venturi section (200) exposed to the outside of the building, the flow speed of the outside air increases by the first flow section (210) and the second flow section (220) forming the upper venturi section (200).

[0145] Then, as the flow speed of the outside air introduced into the upper venturi section (200) accelerates, a negative pressure lower than the surrounding atmospheric pressure is generated by the orifice principle, and the surrounding air, i.e. the air inside the building introduced into the lower venturi section (100), is sucked into the upper venturi section (200).

[0146] That is, air inside the building can be introduced into the interior of the lower venturi section (100).

[0147] And, as the outside air speed passing through the first flow section (210) accelerates, a negative pressure lower than the surrounding atmospheric pressure is generated by the orifice principle, and the surrounding air, i.e., the air inside the building that has entered the lower venturi section (100), is quickly introduced between the first flow sections (210).

[0148] Therefore, the air introduced into the lower venturi section (100) can flow in a orthogonal direction by the first flow section (210).

[0149] This causes the air to be exhausted to the outside along with the outside air flowing in the upper housing.

[0150] Due to this, the ventilation device (10) of the present invention can effectively reduce maintenance costs and noise by eliminating the driving device using power such as a motor.

[0151]

[0152] As such, the embodiments disclosed herein should be considered illustrative rather than restrictive. The scope of the present invention is set forth in the claims, not the foregoing description, and all differences within the scope equivalent thereto should be construed as being encompassed by the present invention.

Claims

1. In a ventilation device that exhausts air containing heat, moisture, and odors inside a building to the outside of the building, A lower venturi section that is connected to the interior of the building and through which the air inside the building is introduced; and It includes an upper venturi part that is exposed to the outside of the building and is fixed to the upper part of the lower venturi part toward the outside of the building, and causes the air introduced into the lower venturi part to flow in a direction perpendicular to the lower venturi part and exhaust the air to the outside of the building. The upper venturi section is a ventilation device that draws in outside air generated from outside the building and increases the flow speed of the outside air.

2. In the first paragraph, the lower venturi part, An outer housing having a cylindrical shape and forming the body; An inner housing having a cylindrical shape and inserted into the inner side of the outer housing; A ventilation fan fixed to the lower part of the inner housing toward the inside of the building, which sucks in the air inside the building and flows the air to the outer housing and the inner housing; and A ventilation device including a control unit electrically connected to the ventilation fan and controlling the operation of the ventilation fan.

3. In paragraph 2, A ventilation device in which the outer housing and the inner housing are formed in a shape in which the circumference becomes narrower and then wider as the air flows.

4. In the third paragraph, the inner housing, A first casing fixed to the inside of the outer housing in a state spaced apart from the inner surface of the outer housing; and Including a second casing fixed to the inside of the first casing while being spaced apart from the inner surface of the first casing, A ventilation device in which a plurality of sawtooth parts are arranged in the direction in which the upper venturi part is arranged in the first casing and the second casing.

5. In paragraph 4, the ventilation fan, A fan fixing member fixed to the lower part of the second casing; and A ventilation device including a propeller rotatably fixed to the lower portion of the fan fixing member.

6. In the first paragraph, the upper venturi part, A first moving part fixed to the upper part of the lower venturi part; and A ventilation device including a second fluid section rotatably arranged inside the first fluid section.

7. In the 6th paragraph, the first fluid part, A lower panel made of a thin panel and having a through hole formed therein that communicates with the lower venturi section; A first dome portion fixed to the upper surface of the lower panel and protruding upward in a hemispherical shape; an upper panel made of a thin panel and spaced upwardly at a distance from the lower panel; and A ventilation device consisting of a second dome portion fixed to the lower surface of the upper panel and protruding downward in a hemispherical shape.

8. In paragraph 7, The second fluid section is a ventilation device disposed between the lower panel and the upper panel.

9. In paragraph 7, A ventilation device having an exhaust port formed on the upper surface of the first dome section in communication with the through hole.

10. In paragraph 9, A ventilation device in which an axial fixing part is fixed to the inside of the first dome portion and is exposed to the outside through the exhaust port, and the second fluid part is rotatably fixed thereto.

11. In the 6th paragraph, the second fluid part, A wind vane rotatably fixed to the first flow section and rotating according to the flow direction of the outside air; Composed of a pair of curved surfaces each positioned on both sides of the above-mentioned wind vane and protruding in a semicircular cross-section in a direction facing each other; and A ventilation device including a gap-maintaining member that is positioned between a pair of curved portions and penetrates the above wind vane, and maintains a gap between the pair of curved portions.

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