Ventilation device

Abstract

The present invention is used for discharging air mixed with heat, moisture, odor and the like inside a building to the outside of the building, and comprises: a lower venturi unit which communicates with the inside of the building and into which the air inside the building flows; and an upper venturi part which is exposed to the outside of the building and is fixed to the upper part of the lower venturi part, which is the direction of the outside of the building, such that the air flowing into the lower venturi part flows in a direction orthogonal to the lower venturi part, and the air is discharged to the outside of the building. External air generated outside the building flows into the upper venturi part, and the flow velocity of the external air is increased.

Description

Technical Field

[0001] This invention relates to ventilation devices, and more specifically, to ventilation devices that exhaust air mixed with heat, moisture, and odors from inside a building to the outside of the building. Background Technology

[0002] Generally speaking, airflow is a concept that indicates how much air can move freely. In buildings, effective airflow helps maintain clean and comfortable air inside the building.

[0003] Therefore, in order to optimize the airflow inside buildings, various exhaust technologies are used to maintain clean and comfortable air inside the buildings.

[0004] This exhaust technology mainly includes ventilation systems, air purification systems, exhaust gas after-treatment technologies, and scrubbers.

[0005] First, a ventilation system is a system that uses fresh outside air to replace the air inside a building in order to improve health and productivity.

[0006] Air purification systems, as a technology that detects and removes harmful substances emitted by factories or vehicles, play an important role in reducing air pollution.

[0007] Exhaust gas aftertreatment technology is a technology that treats exhaust gases generated by automobiles or industrial facilities to reduce air pollution, using catalytic converters, particulate filters, etc.

[0008] Air scrubbers, which remove harmful substances from exhaust gases through chemical reactions or water absorption, are mainly used in coal-fired power plants and other facilities to purify the air.

[0009] Among them, roof fans are a typical example of the use of ventilation systems.

[0010] A roof fan is an air circulation device installed on the rooftops of buildings, apartments, factories, warehouses, etc., to increase airflow in the roof space of a residence or building.

[0011] Roof fans enable efficient airflow to remove internal heat from buildings, apartments, factories, warehouses, etc., and expel moisture and odors, thus improving air quality.

[0012] These roof fans serve to circulate air smoothly inside buildings. Depending on their purpose, they are mainly divided into powered fans and non-powered fans.

[0013] Powered fans, as forced air supply fans (OA; OUTDOOR AIR) and exhaust fans (EA; EXHAUSTAIR) required for ventilation, can regulate the ventilation volume inside buildings such as factories and logistics warehouses. This allows them to ensure forced ventilation based on the spring, summer, autumn, and winter seasons or the internal environment and temperature of the factory or warehouse building, and to plan and adjust the ventilation volume inside the building as needed to control indoor ventilation.

[0014] Furthermore, the power fans can be activated based on seasonal temperature changes, workshop heat and oil vapors, welding fumes and other harmful gases and turbidity concentrations inside the building. In addition, automatic and manual dampers (VDs) can be installed through additional order specifications to regulate the ventilation volume inside the factory and prevent the loss of heating and cooling.

[0015] Moreover, powered fans can forcefully expel stale air from inside buildings to allow fresh air from outside to flow into the interior, thereby improving the working environment inside buildings such as factories and logistics warehouses.

[0016] However, powered fans require a considerable amount of energy to start up, which increases maintenance costs. They may also generate noise due to exceeding the required power and motor speed, and their weight makes them difficult to install, repair, and move.

[0017] While non-powered fans can address some of the problems mentioned in powered fans, they are difficult to maintain a consistent and stable ventilation effect due to their movement depending on the temperature inside the building, the wind speed outside, and the environment inside and outside the building. In particular, ventilation becomes very weak under low air pressure conditions.

[0018] For the reasons mentioned above, the relevant fields are seeking solutions that can reduce maintenance costs and noise while ensuring uniform ventilation, but so far no satisfactory results have been achieved. Summary of the Invention

[0019] (The problem that the invention aims to solve)

[0020] The present invention, which addresses the problems described above, provides a ventilation device that reduces maintenance costs and noise while ensuring uniform ventilation.

[0021] References and Appendix Figure 1 The detailed embodiments will make the foregoing objects, as well as other objects, advantages, features, and methods of achieving them, of the present invention clearer.

[0022] (The measures taken to solve the problem)

[0023] A ventilation device according to an embodiment of the present invention for achieving the above-mentioned objective includes: a lower venturi portion communicating with the interior of a building to allow air from inside the building to flow in; and an upper venturi portion exposed to the exterior of the building and fixed in the lower venturi portion to an upper portion facing the exterior of the building, such that the air flowing into the lower venturi portion flows in a direction orthogonal to the lower venturi portion to discharge the air to the exterior of the building, and external air generated outside the building flows into the upper venturi portion to increase the flow velocity of the external air.

[0024] The lower venturi portion includes: an outer shell, which is cylindrical and forms the main body; an inner shell, which is cylindrical and inserted inside the outer shell; a ventilation fan, which is fixed in the lower part of the inner shell in the direction of the interior of the building and draws in the air inside the building, causing the air to flow to the outer shell and the inner shell; and a control unit, which is electrically connected to the ventilation fan to control the operation of the ventilation fan.

[0025] The outer shell and the inner shell are formed such that their circumference gradually widens along the direction of airflow.

[0026] The inner shell includes: a first shell fixed to the interior of the outer shell in a state separated from the inner peripheral surface of the outer shell; and a second shell fixed to the interior of the first shell in a state separated from the inner peripheral surface of the first shell, wherein a plurality of serrated portions are arranged in the direction in which the upper venturi portion is disposed in the first shell and the second shell.

[0027] The ventilation fan includes: a fan mounting part fixed to the lower part of the second housing; and a propeller rotatably fixed to the lower part of the fan mounting part.

[0028] The upper venturi portion includes: a first flow portion fixed to the upper part of the lower venturi portion; and a second flow portion rotatably disposed inside the first flow portion.

[0029] The first flow section includes: a lower plate formed of a thin plate and having a through hole communicating with the lower venturi portion; a first dome fixed to the upper surface of the lower plate and protruding upward in a hemispherical shape; an upper plate formed of a thin plate and spaced apart from the lower plate toward the upper direction; and a second dome fixed to the lower surface of the upper plate and protruding downward in a hemispherical shape.

[0030] The second flow section is disposed between the lower plate and the upper plate.

[0031] In the first dome, an exhaust port connected to the through hole is formed on the upper surface.

[0032] A shaft fixing part is fixed inside the first dome, exposed to the outside through the exhaust port, and used to rotatably fix the second flow part.

[0033] The second flow section includes: a wind vane, rotatably fixed to the first flow section and rotating along the flow direction of the external air; a pair of curved surfaces, respectively disposed on both sides with the wind vane as the center and protruding in opposite directions with semi-circular cross-sections; and a gap maintaining section, penetrating the wind vane and disposed between the pair of curved surfaces, and maintaining the gap between the pair of curved surfaces.

[0034] (The effect of the invention)

[0035] According to the present invention, in the first housing and the second housing, a plurality of serrated portions are arranged in the direction in which the upper venturi portion is disposed, thereby having the effect of preventing eddies from occurring in the process of air flowing from the lower venturi portion to the upper venturi portion inside the building flowing inside the inner housing.

[0036] Venturi fans, together with the Venturi effect of the lower and upper Venturi sections, further enhance the air intake performance inside a building.

[0037] The outer shell and the inner shell are formed in a shape that widens in circumference as they approach the opposite end of the direction in which the outer shell is disposed. As a result, the outer shell and the inner shell can increase the velocity of the air flowing into the interior of the outer shell and the inner shell through the Venturi effect. Furthermore, as the air velocity inside the outer shell and the inner shell increases, a negative pressure lower than the surrounding atmospheric pressure can be generated through the perforated plate principle. This has the effect of rapidly allowing the air inside the building surrounding the outer shell and the inner shell to flow into the interior of the outer shell and the inner shell.

[0038] The rotating shaft uses external air to rotate the second flow section and exhaust air. This means that external air only passes through a specific intensity, such as only through wind with a fixed rotational resistance based on the rotating shaft, to achieve the exhaust effect. Thus, exhaust force can only be generated when the rotating shaft is continuously rotating. Therefore, compared with existing ventilation devices that operate continuously due to power, which increases the probability of failure, it can effectively reduce maintenance costs and noise.

[0039] The negative pressure sensor can detect the negative pressure occurring in the first flow section and the second flow section, and adjust the speed of the ventilation fan according to the degree of negative pressure. Therefore, it can effectively reduce the power energy consumption for operating the ventilation fan.

[0040] Furthermore, when external air flows into the upper Venturi, the air flowing into the lower Venturi flows in a perpendicular direction, thus effectively preventing air from flowing back into the upper Venturi. Attached Figure Description

[0041] Figure 1 and Figure 2 This is a simplified diagram illustrating the installation state of a ventilation device according to an embodiment of the present invention.

[0042] Figure 3 This is a cross-sectional view of a ventilation device according to an embodiment of the present invention.

[0043] Figure 4 This is an exploded perspective view of the lower venturi portion according to an embodiment of the present invention.

[0044] Figure 5 This is a cross-sectional view showing the lower venturi portion of an embodiment of the present invention.

[0045] Figure 6 An exploded perspective view showing the upper venturi portion of an embodiment of the present invention.

[0046] Figure 7 This is an exploded perspective view of the bottom of the upper venturi portion according to an embodiment of the present invention.

[0047] Figure 8 A side view showing the first flow portion of the upper venturi portion according to an embodiment of the present invention.

[0048] Figure 9 This is a top view showing the second flow section of the upper venturi portion according to an embodiment of the present invention.

[0049] Figure 10 This is a cross-sectional view of the upper venturi portion of an embodiment of the present invention.

[0050] Figure 11 This is a top view showing the operating state of the second flow section according to another embodiment of the present invention.

[0051] Figure 12 This is a cross-sectional view showing the operating state of a ventilation device according to an embodiment of the present invention. Detailed Implementation

[0052] The embodiments of the present invention are provided to more fully illustrate the invention to those skilled in the art. The following embodiments can be modified into many different forms, and the scope of the invention is not limited to the following embodiments. Rather, these embodiments are provided to make this disclosure more comprehensive and complete, and to fully convey the spirit of the invention to those skilled in the art. Furthermore, in the following drawings, the structures are shown in an exaggerated manner for ease of explanation and clarity; in the drawings, the same reference numerals refer to the same elements. As used in this specification, the term "and / or" includes one or more combinations of the listed items.

[0053] The terminology used in this specification is for describing specific embodiments and is not intended to limit the invention.

[0054] As described in this specification, the singular form may include the plural form unless otherwise expressly indicated in the context. Furthermore, as used in this specification, "comprise" and / or "comprising" are intended to specify the presence of the mentioned shapes, numbers, steps, actions, parts, elements, and / or combinations thereof, and not to exclude the presence or addition of more than one other shape, number, action, part, element, and / or combination thereof.

[0055] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0056] Figure 1 and Figure 2 This is a simplified diagram illustrating the installation state of a ventilation device according to an embodiment of the present invention. Figure 3 This is a cross-sectional view illustrating a ventilation device according to an embodiment of the present invention. Figure 4 This is an exploded perspective view of the lower venturi portion according to an embodiment of the present invention. Figure 5 This is a cross-sectional view showing the lower venturi portion of an embodiment of the present invention. Figure 6 This is an exploded perspective view showing the upper venturi portion of an embodiment of the present invention. Figure 7 This is an exploded perspective view of the bottom of the upper venturi portion according to an embodiment of the present invention. Figure 8 This is a side view showing the first flow portion of the upper venturi portion according to an embodiment of the present invention. Figure 9 This is a top view showing the second flow section of the upper venturi portion according to an embodiment of the present invention. Figure 10 This is a cross-sectional view of the upper venturi portion according to an embodiment of the present invention. Figure 11 This is a top view showing the operating state of the second flow section according to another embodiment of the present invention.

[0057] On the other hand, such as Figure 1As shown, the ventilation device 10 of the present invention can be installed in the ceiling of a building to exhaust polluted air from inside the building to the outside, such as... Figure 2 As shown, it can be installed in the duct space of a building and linked with the ventilation devices of each floor or area to exhaust polluted air from the building.

[0058] For ease of explanation, the following description will focus on a structure installed in the ceiling of a building.

[0059] Reference Figure 1 and Figures 3 to 5 A ventilation device 10 according to an embodiment of the present invention, used to exhaust air mixed with heat, moisture and odors from inside a building to the outside of the building, includes a lower venturi portion 100 and an upper venturi portion 200.

[0060] The lower venturi section 100 is connected to the interior of the building, allowing air to flow in and protrude into the interior of the building.

[0061] That is, the lower venturi portion 100 protrudes into the building, so that air mixed with heat, moisture and odors formed inside the building can be easily drawn in.

[0062] This lower venturi portion 100 includes an outer shell 110, an inner shell 120, a ventilation fan 130, and a control unit 140.

[0063] The outer casing 110 is cylindrical in shape and forms the main body of the outer casing 110.

[0064] The inner shell 120 is cylindrical and is inserted inside the outer shell 110.

[0065] like Figure 5 As shown, the outer shell 110 and the inner shell 120 are formed such that the circumference of the outer shell 110 gradually widens as it approaches the other end of the direction in which the air flows (i.e., the direction in which the outer shell 110 is disposed).

[0066] That is, the outer shell 110 and the inner shell 120 can increase the speed of the air flowing into the interior of the outer shell 110 and the inner shell 120 through the Venturi effect.

[0067] Therefore, as the air velocity inside the outer shell 110 and inner shell 120 increases, a negative pressure lower than the surrounding atmospheric pressure can be generated through the perforated plate principle, thereby allowing the air inside the building surrounding the outer shell 110 and inner shell 120 to flow rapidly into the interior of the outer shell 110 and inner shell 120.

[0068] This inner shell 120 includes a first shell 121 and a second shell 123.

[0069] The first housing 121 is fixed inside the outer casing 110 in a state that is separated from the inner peripheral surface of the outer casing 110.

[0070] Furthermore, the lower end of the first housing 121 is fixed in a state that protrudes from the lower part of the outer casing 110.

[0071] Therefore, the air inside the building can be effectively guided along the outer peripheral surface of the first shell 121 protruding from the outer shell 110.

[0072] The second housing 123 is fixed inside the first housing 121 in a state that is separated from the inner peripheral surface of the first housing 121.

[0073] That is, the outer shell 110, the first shell 121 and the second shell 123 are fixed in a mutually spaced state, so that air can flow easily between the outer shell 110 and the first shell 121 and between the first shell 121 and the second shell 123.

[0074] Furthermore, the lower end of the second housing 123 is fixed in a state that protrudes from the lower part of the first housing 121.

[0075] Therefore, the air inside the building can be effectively guided along the outer peripheral surface of the second shell 123 protruding from the first shell 121.

[0076] On the other hand, in the first housing 121 and the second housing 123, a plurality of serrated portions 122 are arranged in the direction in which the upper venturi portion 200 is disposed.

[0077] This serrated section 122 prevents vortices from forming as air inside the building flows from the lower venturi section 100 to the upper venturi section 200 within the inner shell 120.

[0078] Therefore, the exhaust effect of the air flowing into the inner shell 120 can be maintained more stably, and the noise generated during the air flow into the inner shell 120 can be minimized.

[0079] On the other hand, the outer shell 110, the first shell 121 and the second shell 123 can be joined together by welding.

[0080] The ventilation fan 130 is fixed in the lower part of the inner shell 120 in the direction of the interior of the building and draws in air from inside the building, causing the air to flow to the outer shell 110 and the inner shell 120.

[0081] Specifically, the ventilation fan 130 is powered by electricity and receives signals and power from the control unit 140 to rotate and draw in air from inside the building.

[0082] This ventilation fan 130 is formed by a fan mounting part 131 and a propeller 132.

[0083] The fan mounting part 131 is fixed to the lower part of the second housing 123, and the propeller 132 is rotatably fixed to the lower part of the fan mounting part 131.

[0084] This ventilation fan 130 can effectively guide the air inside the building into the outer shell 110 and the inner shell 120.

[0085] 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 portion 100 and the upper Venturi portion 200 described below.

[0086] The control unit 140 is electrically connected to the ventilation fan 130 to control the operation of the ventilation fan 130. This allows the pressure inside the device to be detected, the speed of the ventilation fan 130 to be adjusted, and the ON / OFF state of the ventilation fan 130 to be realized.

[0087] Furthermore, the control unit 140 can be formed by a negative pressure sensor.

[0088] The negative pressure sensor can detect the negative pressure generated in the first flow section 210 and the second flow section 220, and adjust the speed of the ventilation fan 130 according to the degree of negative pressure.

[0089] Therefore, the power consumption for running the ventilation fan 130 can be effectively reduced.

[0090] Reference Figure 1 , Figure 3 and Figures 6 to 9 The upper venturi portion 200 is exposed to the outside of the building and is fixed in the lower venturi portion 100 to the upper part which is the direction of the building's exterior.

[0091] Therefore, outside air flows in the upper venturi section 200 as natural wind outside the building.

[0092] Furthermore, the upper venturi section 200 directs the air flowing into the lower venturi section 100 in a direction perpendicular to the lower venturi section 100, so as to discharge the air flowing into the lower venturi section 100 to the outside of the building.

[0093] In particular, external air flows in at the upper venturi section 200 as a natural wind generated outside the building, and increases the flow speed of the external air.

[0094] That is, as the flow speed of external air flowing into the upper Venturi section 200 increases, the upper Venturi section 200 can generate a negative pressure lower than the surrounding atmospheric pressure through the orifice plate principle, so that the surrounding air, that is, the air inside the building flowing into the lower Venturi section 100, is drawn into the upper Venturi section 200. Therefore, the air is discharged to the outside along the external air flowing in the upper shell.

[0095] Therefore, the ventilation device 10 of the present invention eliminates the need for electrically driven devices such as motors, thereby effectively reducing maintenance costs and noise.

[0096] This upper venturi portion 200 includes a first flow portion 210 and a second flow portion 220.

[0097] Reference Figure 8 The first flow section 210 is fixed to the upper part of the lower venturi section 100 and includes a lower plate 211, a first dome 213, an upper plate 216 and a second dome 217.

[0098] The lower plate 211 is formed of a thin plate and has a lower plate 212 that communicates with the lower venturi portion 100.

[0099] Furthermore, a lower venturi portion 100 is fixed to the lower surface of the lower plate 211, and the remaining area, excluding the area where the lower venturi portion 100 is fixed, is fixed to the roof of the building while spanning the exterior of the building, such as the roof.

[0100] That is, since the lower plate 211 spans across the roof of the building, the lower venturi portion 100 fixed to the lower plate can be firmly fixed to the building.

[0101] The first dome 213 is fixed to the upper surface of the lower plate 211 and protrudes upward in a hemispherical shape.

[0102] An exhaust port 214, which communicates with the lower plate 212, is formed on the upper surface of the first dome 213.

[0103] The exhaust port 214 is connected to the lower plate 212 of the lower plate 211, so that the air flowing into the interior of the building through the lower plate 212 and the exhaust port 214 can flow easily between the upper plate 216 and the lower plate 211.

[0104] Furthermore, a shaft fixing part 215 is fixed inside the first round top 213.

[0105] The shaft fixing part 215 is exposed to the outside through the exhaust port 214, and the second flow part 220 described below is rotatably fixed thereon.

[0106] That is, the second flow section 220 can be rotatably fixed inside the first flow section 210 via the shaft fixing section 215.

[0107] This shaft fixing part 215 can be combined with the upper inner circumferential surface of the first dome 213 by welding.

[0108] The upper plate 216 is formed of a thin plate and is spaced upwards from the lower plate 211.

[0109] Moreover, unlike the lower plate 211, the upper plate 216 is formed as a structure that does not have the structure of the lower plate 212.

[0110] Therefore, the upper plate 216 can be equipped with rain and snow protection devices that appear according to weather conditions such as rain or snow.

[0111] The upper plate 216 and the lower plate 211 are supported by the support member 230.

[0112] The second dome 217 is fixed to the lower surface of the upper plate 216 and protrudes downward in a hemispherical shape.

[0113] Therefore, as Figure 8 As shown, the first dome 213 and the second dome 217 cause the outside air from outside the building to increase its speed and decrease its pressure at the narrowest neck due to the Venturi structure.

[0114] Therefore, as the external air velocity increases through the first dome 213 and the second dome 217, a negative pressure lower than the surrounding atmospheric pressure can be generated through the perforated plate principle, so that the surrounding air, that is, the air inside the building flowing into the lower venturi section 100, can quickly flow between the first dome 213 and the second dome 217.

[0115] Therefore, as Figure 12 As shown, the air flowing into the interior of the lower venturi portion 100 can flow in an orthogonal direction through the first flow section 210.

[0116] Reference Figure 7 and Figure 9 The second flow section 220 is rotatably disposed inside the first flow section 210, specifically, disposed between the lower plate 211 and the upper plate 216 of the first flow section 210.

[0117] Furthermore, the second flow section 220 rotates according to the direction of the wind blowing from outside the building.

[0118] This second flow section 220 includes a wind vane 221, a curved section 224, and an interval maintenance section 225.

[0119] The wind vane 221 is rotatably fixed to the first flow section 210, specifically to the shaft fixing section 215, and rotates according to the flow direction of the external air, i.e., the wind direction.

[0120] Specifically, the weather vane 221 is formed by a rotating shaft 222 and arrow fletching 223.

[0121] The rotating shaft 222 is rotatably fixed to the shaft fixing part 215 and rotates as the wind collides with the arrow feathers 223.

[0122] Furthermore, the rotating shaft 222 allows the external air to be rotated and exhausted by means of external air, so that the external air only passes through a specific intensity, for example, only through wind with a fixed intensity of rotational resistance based on the rotating shaft 222.

[0123] That is, the ventilation device 10 of the present invention can only operate when it generates wind force of external air of a certain intensity or higher.

[0124] Therefore, the ventilation device 10 of the present invention can only generate exhaust force when the rotating shaft 222 is continuously rotating. Therefore, compared with the existing ventilation device 10 which is continuously operated due to power and thus increases the probability of failure, it can effectively reduce maintenance costs and noise.

[0125] Moreover, such as Figure 10 As shown, the upper and lower surfaces of the wind vane 221 are respectively formed into shapes corresponding to the protruding surfaces of the first dome 213 and the second dome 217, which are located at intervals from the wind vane 221.

[0126] Therefore, the wind vane 221 can rotate easily without interfering with the first dome 213 and the second dome 217.

[0127] The curved surfaces 224 form a pair, positioned on both sides with the weather vane 221 as the center, and protruding in opposite directions with semi-circular cross-sections.

[0128] Therefore, the pair of curved surfaces 224 together with the first dome 213 and the second dome 217 of the first flow section 210 cause the outside air from outside the building to increase the speed and reduce the pressure at the narrowest neck due to the Venturi structure.

[0129] Therefore, as the external air velocity increases through the pair of curved surfaces 224, a negative pressure lower than atmospheric pressure can be generated through the perforated plate principle, so that the surrounding air, i.e. the air flowing into the building into the lower venturi portion 100, can flow rapidly between the pair of curved surfaces 224 and the first dome 213 and the second dome 217.

[0130] That is, the ventilation device 10 of the present invention can further effectively generate pressure below atmospheric pressure in both the vertical and horizontal directions due to the first dome 213 and the second dome 217 in the vertical direction and the pair of curved surfaces 224 in the horizontal direction.

[0131] Furthermore, through the Venturi structure of the lower Venturi portion 100 and the upper Venturi portion 200, the ventilation device 10 of the present invention can reduce energy consumption and maintenance costs compared with conventional roof fans that rely on electricity to continuously operate and exhaust.

[0132] Furthermore, when external air flows into the upper Venturi section 200, the air flowing into the lower Venturi section 100 flows in an orthogonal direction, thereby effectively preventing air from flowing back into the upper Venturi section 200.

[0133] The spacing maintenance section 225 is disposed between the pair of curved surfaces 224 through the ventilation guide 221 and maintains the spacing between the pair of curved surfaces 224.

[0134] Therefore, even if strong external air flows between the lower plate 211, the upper plate 216 and the curved surface 224, the gap maintaining part 225 can firmly fix the wind vane 221 and the curved surface 224 to prevent them from scattering.

[0135] On the other hand, such as Figure 11 As shown, in another embodiment of the present invention, the interval maintaining part 225' can selectively change the interval between a pair of curved surfaces 224.

[0136] That is, the distance between the pair of curved surfaces 224 can be easily adjusted by the spacing maintenance part 225', and the curved surfaces 224 can be adapted to the usage environment such as the amount of air exhausted in windy areas or inside buildings.

[0137] Hereinafter, the preferred operational relationship of the present invention will be described in detail with reference to the accompanying drawings.

[0138] Figure 12 This is a cross-sectional view showing the operating state of a ventilation device 10 according to an embodiment of the present invention.

[0139] First, the present invention is formed by a lower venturi portion 100 and an upper venturi portion 200, which are interconnected.

[0140] Furthermore, the lower venturi portion 100 is located inside the building, while the upper venturi portion 200 is located outside the building.

[0141] If external air, which is natural wind outside the building, flows in through the exposed upper venturi section 200, the flow speed of the external air is increased by the first flow section 210 and the second flow section 220 forming the upper venturi section 200.

[0142] As a result, the flow speed of the external air flowing into the upper Venturi section 200 increases, and a negative pressure lower than the surrounding atmospheric pressure is generated through the orifice plate principle, so that the surrounding air, that is, the air inside the building flowing into the lower Venturi section 100, is quickly drawn into the upper Venturi section 200.

[0143] That is, the air inside the building can flow into the interior of the lower venturi section 100.

[0144] Furthermore, as the speed of the external air passing through the first flow section 210 increases, a negative pressure lower than the surrounding atmospheric pressure is generated through the perforated plate principle, thereby causing the surrounding air, that is, the air inside the building flowing into the lower venturi section 100, to flow rapidly into the space between the first flow sections 210.

[0145] Therefore, the air flowing into the interior of the lower venturi portion 100 can flow in an orthogonal direction through the first flow portion 210.

[0146] Therefore, the air is discharged to the outside along with the external air flowing in the upper shell.

[0147] Therefore, the ventilation device 10 of the present invention eliminates the need for electrically driven devices such as motors, thereby effectively reducing maintenance costs and noise.

[0148] Therefore, the embodiments disclosed in this specification should not be considered from a limiting perspective, but rather from an illustrative perspective. The scope of the invention is set forth in the claims, not in the foregoing description, and all differences within the equivalent scope should be construed as encompassing the invention.

Claims

1. A ventilation device for exhausting air mixed with heat, moisture, and odors from inside a building to the outside, characterized in that, include: The lower venturi section is connected to the interior of the building, allowing the air inside the building to flow in; as well as The upper venturi portion is exposed to the exterior of the building and is fixed within the lower venturi portion to the upper part facing the exterior of the building. This allows air flowing into the lower venturi portion to flow in a direction perpendicular to the lower venturi portion, so that the air is discharged to the exterior of the building. External air generated outside the building flows into the upper venturi section, increasing the flow velocity of the external air.

2. The ventilation device according to claim 1, characterized in that, The lower Venturi portion includes: The outer shell is cylindrical in shape and forms the main body; The inner shell is cylindrical and is inserted inside the outer shell; A ventilation fan, fixed within the inner shell to the lower part facing the interior of the building, draws in air from inside the building, causing the air to flow towards the outer shell and the inner shell; and The control unit is electrically connected to the ventilation fan to control the operation of the ventilation fan.

3. The ventilation device according to claim 2, characterized in that, The outer shell and the inner shell are formed such that their circumference gradually widens along the direction of airflow.

4. The ventilation device according to claim 3, characterized in that, The inner shell includes: A first housing is fixed inside the outer casing, spaced apart from the inner circumferential surface of the outer casing; and The second housing is fixed inside the first housing, spaced apart from the inner circumferential surface of the first housing. In the first housing and the second housing, a plurality of serrated portions are arranged in the direction in which the upper venturi portion is disposed.

5. The ventilation device according to claim 4, characterized in that, The ventilation fan includes: A fan mounting part is fixed to the lower part of the second housing; and The propeller is rotatably fixed to the lower part of the fan mounting portion.

6. The ventilation device according to claim 1, characterized in that, The upper Venturi portion includes: The first flow section is fixed to the upper part of the lower venturi section; and The second flow section is rotatably disposed inside the first flow section.

7. The ventilation device according to claim 6, characterized in that, The first flow section includes: The lower plate is formed of a thin plate and has a through hole that communicates with the lower venturi portion; The first dome is fixed to the upper surface of the lower plate and protrudes upward in a hemispherical shape; The upper plate is formed of a thin plate and is spaced apart from the lower plate in the upward direction; and The second dome is fixed to the lower surface of the upper plate and protrudes downward in a hemispherical shape.

8. The ventilation device according to claim 7, characterized in that, The second flow section is disposed between the lower plate and the upper plate.

9. The ventilation device according to claim 7, characterized in that, In the first dome, an exhaust port connected to the through hole is formed on the upper surface.

10. The ventilation device according to claim 9, characterized in that, A shaft fixing part is fixed inside the first dome, exposed to the outside through the exhaust port, and used to rotatably fix the second flow part.

11. The ventilation device according to claim 6, characterized in that, The second flow section includes: The wind vane is rotatably fixed to the first flow section and rotates along the direction of airflow. The curved surfaces form a pair, positioned on either side of the weather vane as the center, and protrude in opposite directions with semi-circular cross-sections; and The interval maintaining section extends through the wind vane and is disposed between the pair of curved surfaces, and maintains the interval between the pair of curved surfaces.

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