JP2003083577A - Ventilation system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a ventilation system for ventilating by utilizing a wind or the like in a multi-story building having void spaces therein. SOLUTION: The ventilation system comprises an air supply duct (f) formed to communicate with a dwelling unit (e) out of a building and an exhaust duct (g) formed to communicate with the void space (f) from the unit (e) in a multi- story building having the void spaces (b). In this system, the duct (f) has an air flow rate regulating damper 1 for regulating an air flow rate. The duct (g) has an air flow rate regulating/air backflow preventive damper 11 for regulating the air flow rate and preventing the air from back flowing. When the wind A is operated at the building (a), an air flow directed from outside of the building toward the void space (b) side is induced by a rising air flow B generated in the void space (b), and further since the air flow rate is regulated, good ventilation can be executed at the building (a).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-story building having a void space communicating with the roof inside the building.
The present invention relates to a ventilation system for performing indoor / outdoor ventilation by utilizing an ascending air current generated in the void space.

[0002]

2. Description of the Related Art As a plane plan that is often used for high-rise houses, there is known a plane plan having a void space that communicates with the roof inside the building. In this flat plan, generally, by arranging a common corridor around the void space and providing a void space, all the dwelling units face the outer circumference, and it is easy to ensure privacy, and the void space allows the area around the common corridor to be secured. It is possible to create a bright and open space.

Further, in a high-rise house or the like having the above-mentioned plan, when wind acts on a building, the wind just above the building causes a negative pressure above the building compared to the void space. In addition, an ascending air current is generated in the void space due to heat generated from the inside of the building. In recent years, it has been attempted to adopt a natural ventilation system that uses the ascending airflow for indoor and outdoor ventilation.

The ventilation system described in Japanese Patent Laid-Open No. 05-141728 is also one of the ventilation systems utilizing the void space as described above. In the ventilation system described in the above publication, as shown in FIG. 20, a wind acts on the building 101 by forming a hood 103 having a convex curved surface shape on the roof of the building 101 having a void space 102 communicating with the roof. In this case, the wind speed at the upper end 102a of the void space is increased. Thereby, the negative pressure degree of the void space upper end portion 102a is increased to increase the pressure difference between the upper and lower sides of the void space 102, and more upward airflow 104 is generated to flow from the building exterior 105 to the void space 102 through the duct 106. The air flow rate is increased and the ventilation volume of the building 101 is increased.

[0005]

By the way, in the ventilation by the natural ventilation system, the air flow rate is adjusted within a predetermined range regardless of whether the air flow rate flowing into the duct is large or small. It is necessary to keep it within a certain range. That is, in the natural ventilation system, the small air flow rate is effectively used when the air flow rate is small, and when the air flow rate becomes excessive, the indoor environment is improved unless adjustment is made to reduce the air flow rate. It is difficult to use it as a ventilation system for. However, in the ventilation system described in the above publication, it is not found that the pressure difference above and below the void space 102 is increased to increase the air flow rate in the duct 106 to increase the ventilation volume when the wind acts. However, there is no description of adjusting the air flow rate as described above.

Therefore, an object of the present invention is, in a multi-story building having a void space that communicates with the rooftop inside the building, uses the upward airflow generated in the void space to ventilate indoors and outdoors, and The object of the present invention is to provide a ventilation system that makes it possible to adjust the ventilation amount within a predetermined range by adjusting the air flow rate.

[0007]

In order to solve the above-mentioned problems, the invention according to claim 1 is, for example, as shown in FIGS. 1 to 3, in a multi-story building a having a void space b communicating with the roof. A ventilation system for performing indoor and outdoor ventilation, wherein the building a is provided with an air supply duct f communicating from the building exterior (high-rise residential exterior a2) to the building interior (dwelling unit e), and An exhaust duct g communicating from the (dwelling unit e) to the void space b is formed, and the air supply duct f adjusts the air flow rate from the outside of the building (outside of the high-rise housing a2) to the void space b. An air flow rate adjustment damper 1 for adjusting the air flow rate from the outside of the building (outside of the high-rise housing a2) to the void space b is adjusted in the exhaust duct g.
An air flow rate adjustment / backflow prevention damper 11 for preventing the backflow of the airflow is provided, and the wind just above the building (immediately above the high-rise house a1) causes the airflow just above the building (above the high-rise house a1) to Due to the negative pressure compared to the void space b and the heat generated from the building a in the void space b, an ascending airflow B is generated in the void space b, and the ascending airflow B causes the void space b to be generated. Becomes a negative pressure in comparison with the outside a2 of the building, and the pressure difference between the void space b and the outside a2 of the building, which is caused by the fact that It is characterized in that it guides an air flow toward the inside (dwelling unit e) side and guides an air flow into the exhaust duct g from the inside (dwelling unit e) side of the building toward the void space b side.

According to the first aspect of the invention, the building has:
An air supply duct communicating from the outside of the building to the inside of the building is formed, and in the air supply duct, while adjusting the air flow rate from the outside of the building to the inside of the building, a backflow of the airflow is prevented. Equipped with air flow rate adjustment / backflow prevention damper. Further, in the building, an exhaust duct communicating from the inside of the building to the void space is formed, and in the exhaust duct, while adjusting an air flow rate from the inside of the building to the void space side, It is equipped with an air flow rate adjustment and backflow prevention damper to prevent backflow.

Here, when a wind acts on the building, the wind passing directly above the building causes a negative pressure in the area directly above the building as compared with the void space, and heat is generated from the building in the void space. Therefore, due to these, an ascending air current is generated in the void space. When the ascending air current is generated, the void space has a negative pressure as compared with the outside of the building, and a pressure difference is generated between the void space and the outside of the building. Then, due to the pressure difference, an airflow from the outside of the building to the inside of the building is induced in the air supply duct, and an airflow from the inside of the building to the void space side is induced in the exhaust duct. To be done.

At this time, by the air flow rate adjusting damper,
The flow rate of air flowing into the air supply duct from the outside of the building is adjusted. Further, the air flow rate adjustment / backflow prevention damper adjusts the air flow rate flowing out from the exhaust duct to the void space side, and at the same time, prevents the backflow of the airflow. That is, even when the wind acts from a certain direction, it is possible to ventilate the entire building and improve the indoor environment by adjusting the ventilation amount within a predetermined range.

At this time, when the windward side receives wind pressure, more airflow from the building outer side to the building inner side, which is the windward side, is induced, and thereby, the void space side from the building inner side. The air flow to the head is also induced more.

The invention according to claim 2 is, for example, as shown in FIG. 1, in the ventilation system according to claim 1, the building a leads from the lower part of the void space b1 to the outside of the building (outside of the high-rise house a2). A lower exhaust duct h is formed, and the lower exhaust duct h is provided with a backflow prevention damper 21 for preventing backflow of an airflow from the void space lower part b1 side toward the building exterior (high-rise housing exterior a2) side. The outside of the building that is equipped and is on the lee side
2) is lower in pressure than the void space lower part b1, and the lower part exhaust is utilized by utilizing the pressure difference between the void space lower part b1 and the building exterior (the high-rise housing exterior a2) on the leeward side. An airflow is guided from the lower side b1 of the void space to the outside of the building (outside of the high-rise housing a2), which is the leeward side, in the duct h.

According to the second aspect of the present invention, the building is formed with a lower exhaust duct communicating from the lower portion of the void space to the outside of the building, and the lower exhaust duct is formed from the lower side of the void space. A backflow prevention damper is provided to prevent backflow of the airflow toward the outside.

Here, when wind acts on the building, the outside of the building on the leeward side has a negative pressure compared to the void space, and the pressure difference between the lower part of the void space and the outside of the building on the leeward side. Occurs. Then, due to the pressure difference, an air flow is induced in the exhaust duct from the void space side toward the leeward side of the building outside. At this time, the backflow prevention damper prevents the backflow of the airflow flowing from the exhaust duct to the leeward side of the building outside.

In other words, it is possible to increase the negative pressure inside the void space to promote the upward airflow generated in the void space and increase the pressure difference between the void space and the outside of the building. Therefore, it is more certain to guide the airflow from the building exterior side to the building interior side in the air supply duct, and to guide the airflow from the building interior side to the void space side in the exhaust duct. It becomes possible to do it.

The backflow prevention damper may be a generally used damper having a predetermined backflow prevention function.

The invention according to claim 3 is, for example, as shown in FIGS.
As shown in, in the ventilation system according to claim 1,
The air flow rate adjustment damper 1 is a duct (air supply duct f).
The frame member 2 forming a part of the duct (air supply duct f) by being connected to the main blade rotation shaft 4 orthogonal to the axial direction of the duct (air supply duct f). And a main blade 3 that is possible, and the duct (air supply duct f)
As the flow rate of air flowing into the inside increases, the main blades 3 receive wind pressure and lift force, and the main blades 3 rotate in a direction to reduce the flow rate of air passing through the inside of the duct (air supply duct f). The flow rate of air passing through the duct (air supply duct f) is adjusted within a predetermined range.

According to the third aspect of the present invention, in the air flow rate adjusting damper, the air flow rate of the main blades is reduced by the wind pressure and the lift force as the air flow rate increases. The air flow rate passing through the inside of the duct is adjusted within a predetermined range by rotating the duct in the direction of moving.

That is, since the air flow rate adjusting damper can adjust the air flow rate passing through the duct within a predetermined range, and has a relatively simple structure, the manufacturing cost can be suppressed. In addition, the installation space is small, and the degree of freedom of the installation position can be increased.

The main blade has a size and shape corresponding to an inner cross-section of the duct formed by a plane orthogonal to the axis of the duct (specifically, when the duct has a cylindrical shape, an outer diameter corresponding to the inner diameter of the duct). And the like). The main blade is rotatable within the duct about the main blade rotating shaft, and is capable of closing the internal space of the duct above the plane including the main blade rotating shaft and the axis of the duct, and Other materials may be used as long as they can close the internal space below the plane.

According to a fourth aspect of the present invention, as shown in FIGS. 10 to 18, for example, in the ventilation system according to the first or second aspect, the air flow rate adjusting / backflow preventing damper 11 is provided.
Is a frame member 12 that forms a part of the duct (exhaust duct g) by being connected to the duct (exhaust duct g), and a main blade rotating shaft that is orthogonal to the axial direction of the duct (exhaust duct g). A main blade 13 rotatable about 14 and an auxiliary blade 15 rotatable about an auxiliary blade rotating shaft 16 which substantially coincides with the main blade rotating shaft 14 are provided. , The auxiliary blade 15 is the duct (exhaust duct g)
The main blade 13 is rotated in a direction to increase the air flow rate passing through the inside thereof, and the main blade 13 is subjected to wind pressure and lift with an increase in the air flow rate flowing into the duct (exhaust duct g). The air flow rate passing through the duct (exhaust duct g) is adjusted within a predetermined range by rotating in a direction to reduce the air flow rate passing through the duct (exhaust duct g). The air that passes through the duct (exhaust duct g) is cooperated with the blade 15 and the main blade 13 that rotates in a direction that receives wind pressure and reduces the flow rate of the air that passes through the duct (exhaust duct g). The feature is that the backflow is prevented by setting the flow rate to almost zero.

According to the fourth aspect of the present invention, the air flow rate adjusting / backflow preventing damper rotates in a direction in which the auxiliary vanes increase the air flow rate passing through the duct during forward airflow, and at the same time, the wind pressure is increased. As the main blade receives wind pressure and lift force and rotates in a direction in which the main blade reduces the air flow rate passing through the duct, the air flow rate passing through the duct falls within a predetermined range. adjust. Further, during the reverse air flow, the auxiliary vanes and the main vanes that rotate in a direction that receives the wind pressure and decreases the air flow rate passing through the duct cooperates so that the air flow rate passing through the duct is almost zero. To prevent backflow.

That is, the air flow rate adjusting / reverse air flow preventing damper can adjust the air flow rate passing through the duct within a predetermined range, and can prevent the reverse air flow inside the duct. . Furthermore, the air flow rate adjustment
The backflow prevention damper integrates the airflow adjustment damper and the backflow prevention damper, and has a relatively simple structure, so it is possible to reduce the manufacturing cost and the installation space is small. Therefore, it is possible to increase the degree of freedom of the installation position.

The main blade may be the same as the main blade formed in the air flow rate adjusting damper of the third aspect.

The auxiliary blades have, for example, a size and shape corresponding to a portion below the auxiliary blade rotation axis in the inner hollow section of the duct formed by a plane orthogonal to the duct axis (specifically, the duct has a cylindrical shape). In this case, it may be, for example, a disc having an outer diameter corresponding to the inner diameter of the duct divided into two. Other auxiliary blades may be used as long as they can rotate in the duct about the auxiliary blade rotation axis and can close the internal space below the plane.

[0026]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a ventilation system according to the present invention will be described below with reference to FIGS. First, the configuration of the ventilation system according to the present invention will be described.

In FIGS. 1 and 2, reference numeral a is a high-rise house in which the ventilation system according to the present invention is adopted. As shown in FIGS. 1 and 2, the high-rise house a (building) includes
A void space b communicating with the rooftop is formed, and a common corridor c is arranged around the void space b. In the high-rise house a, a balcony d is arranged on the outer periphery thereof, and a dwelling unit e is arranged between the common corridor c and the balcony d.

As shown in FIGS. 1 to 3, the dwelling unit e is provided with an air supply duct f leading from the outside a2 of the high-rise house (outside the building) to the dwelling unit e (inside the building).
An exhaust duct g communicating from the dwelling unit e to the void space b is formed. An air flow rate adjustment damper 1 for adjusting an air flow rate from the high-rise residential exterior a2 side to the dwelling unit e side is provided on the air supply duct f on the high-rise residential exterior a2 side. The exhaust duct g is provided with an air flow rate adjustment / reverse air flow prevention damper 11 for adjusting the air flow rate from the dwelling unit e side to the void space b side and for preventing the back flow of the air flow.

The high-rise housing a is formed with a lower exhaust duct h leading from the void space lower part b1 to the high-rise house outside a2. A backflow prevention damper 21 for preventing backflow of an airflow from the void space lower part b1 side toward the high-rise house outside a2 side is provided on the lower exhaust duct h on the high-rise house outside a2 side.

The operation of the ventilation system according to the present invention will be described below. First, when the wind A acts on the high-rise house a, the wind A1 passing directly above the high-rise house a1 (immediately above the building).
As a result, the a2 directly above the high-rise house has a negative pressure as compared with the void space b, and heat is generated in the void space b from the dwelling unit e, so that they rise in the void space b. Airflow B is generated. When this rising airflow B is generated, the void space b has a negative pressure as compared with the outside a2 of the high-rise housing, and a pressure difference is generated between the void space b and the outside a2 of the high-rise housing.

Due to the pressure difference, an airflow from the exterior a2 side of the high-rise housing to the dwelling unit e side is guided in the air supply duct f, and the exhaust duct g has the void space from the dwelling unit e side. The airflow toward the b side is induced. At this time, as shown in FIG. 3, auxiliary fans i and j may be provided in order to promote the induction of the air flow in the air supply duct f and the exhaust duct g. The windward pressure on the windward side promotes the induction of airflow in the air supply duct f and the exhaust duct g.

Next, used in the embodiment of the present invention,
The air flow rate adjustment damper 1 and the air flow rate adjustment / backflow prevention damper 11 will be described. It should be noted that the backflow prevention damper 21 may be a commonly used damper having a predetermined backflow prevention function, and a description thereof will be omitted.

First, the air flow rate adjusting damper 1 will be described with reference to FIGS. As shown in FIG. 4, the air flow rate adjusting damper 1 according to the present invention includes a cylindrical frame member 2 and a frame member 2 that are connected to the air supply duct f and form a part of the air supply duct f. The main blade 3 is formed in a disc shape corresponding to the inner diameter.

The main blade 3 is mounted inside the frame member 2 via a main blade rotating shaft 4 which is orthogonal to the axial direction of the frame member 2, and smoothly rotates around the main blade rotating shaft 4. It is possible. A main blade stopper 8 is provided on the inner surface of the upper portion of the frame member 2, and the main blade 3 regulates clockwise rotation of the main blade 3 in a state where the main blade 3 closes the internal space of the frame member 2.

If the left side portion of the main blade 3 of FIG. 4 and the like with respect to the main blade rotating shaft 4 is the upper operating portion 3a and the right side portion is the lower operating portion 3b, the upper operating portion 3a side is the lower operating portion 3b side. The main blade rotating shaft 4 is set to be slightly heavier than
It is set at a position slightly displaced from the center of gravity of the. Therefore, when the main blade 3 receives almost no wind resistance and when there is little air flow, the main blade 3 tries to rotate counterclockwise, but at the position where the main blade 3 is substantially horizontal, A stopper 10 is provided on the inner surface of the frame member 2 at the time of a slight air flow rate such as a screw so as to restrict the rotation.

Here, as described above, the upper working portion 3a of the main blade 3 is set to be slightly heavier than the lower working portion 3b so that the upper working portion 3a is lowered in the state of no wind and the small air flow rate. However, this may be because the position of the main blade rotating shaft 4 with respect to the main blade 3 is set to be slightly displaced from the center of the main blade 3, or the upper operating portion 3a.
In addition, a weight (not shown) may be provided.

The operation of the air flow rate adjusting damper 1 having such a configuration will be described in detail below. In addition, below, the wind from the right side of the figure is described as a forward air flow, and the wind from the left side of the figure is described as a reverse air flow. Also, the description of the small air flow rate, the medium air flow rate, the atmospheric air flow rate, the air flow rate, the wind, and the like relate to the forward air flow.

<No wind and small air flow> Since the upper working part 3a side of the main blade 3 is heavier than the lower working part 3b side, the inside of the air supply duct f is in a no-air state or in a small air flow state. Then, the main blade 3 tries to rotate counterclockwise,
As shown in FIGS. 4B and 5, the upper working portion 3a is positioned slightly above the lower working portion 3b, and the rotation of the frame member 2 is regulated at a position where the upper working portion 3a is inclined. The inner surface is provided with a stopper 10 such as a screw when a small amount of air flows.

<Transition from a small air flow rate to a medium air flow rate> Since the upper working portion 3a of the main blade 3 is located slightly above, as shown in FIG. Feather 3
The upper space of is narrowed from the right side to the left side. As a result, the flow velocity of the wind passing through the upper space gradually increases from the right side to the left side, and the upper operating portion 3a
A lift force larger than the lift force acting on the lower operation unit 3b acts on. Therefore, the air flow rate inside the air supply duct f increases, the air flow rate shifts from the small air flow rate to the medium air flow rate, and when the lift reaches the critical air flow rate for rotating the main blade 3, the main blade 3 rotates clockwise. Rotate.

<Transition from Medium Air Flow Rate to Atmosphere Flow Rate> When the air flow rate flowing through the air supply duct f further increases and the medium air flow rate is changed to the atmospheric flow rate, as shown in FIG. Then, the main blade 3 further rotates clockwise.

<Transition from atmospheric flow rate to strong flow rate> When the flow rate of the air flowing through the air supply duct f further increases and the atmospheric flow rate shifts to the strong flow rate, the main blade 3 further rotates clockwise. The main blade 3 is likely to hit the main blade stopper 8 by rotating, and the air flow rate passing above and below the main blade 3 is significantly reduced. Then, the lift force received by the upper operation unit 3a and the lower operation unit 3b becomes smaller and the difference in the lift forces becomes smaller, and the main blade 3 rotates slightly counterclockwise and the air flow rate passing above and below the main blade 3 becomes small. Increase to. As a result, the upper operating portion 3a again receives a lift force, the main blade 3 rotates slightly clockwise, and the air flow rate passing above and below the main blade 3 decreases. Thereafter, these operations are repeated while gradually attenuating, and the air flow rate becomes stable (see FIG. 8).

Further, modified examples of the air flow rate adjusting damper 1 are shown in FIGS. 9 (a) and 9 (b). The same components as those of the air flow rate adjusting damper 1 are designated by the same reference numerals, and the description thereof will be omitted.

In FIGS. 9 (a) and 9 (b), by bending the upper operating portion 3b and the lower operating portion 3a,
The 1st air receiving part 7a and the 2nd air receiving part 7b are formed. As a result, even in the case where the air flow causes excessive ventilation when the flow rate is strong,
By receiving the wind pressure on the air blower 7a and the second air blower 3a, the main blades 3 can be rotated so that the amount of air passing through the air supply duct f becomes substantially zero.

Next, the air flow rate adjustment / backflow prevention damper 11 will be described with reference to FIGS.
The air flow rate adjusting / backflow preventing damper 11 according to the present invention is
As shown in FIG. 10, the cylindrical frame member 1 which is connected to the exhaust duct g and constitutes a part of the exhaust duct g.
2. The main blade 13 has a disc shape corresponding to the inner diameter of the frame member 12, and the auxiliary blade 15 has a semi-disc shape corresponding to the inner diameter of the frame member 12.

The main blade 13 is mounted inside the frame member 12 via a main blade rotating shaft 14 which is orthogonal to the axial direction of the frame member 12, and smoothly rotates around the main blade rotating shaft 14. It is possible. A main blade stopper 18 is provided on the inner surface of the upper portion of the frame member 12, and the main blade 13 restricts the clockwise rotation of the main blade 13 in a state in which the internal space of the frame member 12 is closed.

Main blade rotating shaft 1 of main blade 13 shown in FIG.
4, when the left side portion is the upper operating portion 13a and the right side portion is the lower operating portion 13b, the main blade rotating shaft 14 is set so that the upper operating portion 13a side is slightly heavier than the lower operating portion 13b side. It is set at a position slightly displaced from the center of gravity of the blade 13. Therefore, when the main blade 13 receives almost no wind resistance and when there is little air flow, the main blade 13 tries to rotate counterclockwise, but at the position where the main blade 13 is substantially horizontal, A stopper 20 such as a screw at the time of minute air flow is provided on the inner surface of the frame member 12 so as to restrict the rotation.

The auxiliary blade 15 is mounted inside the frame member 12 via an auxiliary blade rotating shaft 16 which substantially coincides with the main blade rotating shaft 14, and smoothly rotates around the auxiliary blade rotating shaft 16. It is possible. An auxiliary blade stopper 19 is provided on the inner surface of the lower portion of the frame member 12, and the auxiliary blade 15 is rotated counterclockwise in a state where the auxiliary blade 15 closes a portion below the auxiliary blade rotation shaft 16 in the internal space of the frame member 12. The rotation of the is regulated. Therefore, the auxiliary blade 15 can be smoothly rotated in the region on the left side of the auxiliary blade stopper 19. The auxiliary blades 15 rotate until the auxiliary blades 15 receive a wind pressure of a certain value or more from the right side.
It is in a state of hanging down from 6. Further, even if wind pressure is applied from the left side, the rotation is restricted by the auxiliary blade stopper 19.

Here, as described above, the upper working portion 13a of the main blade 13 is set to be slightly heavier than the lower working portion 13b so that the upper working portion 13a is lowered in the state of no wind and the small air flow rate. However, this may be because the position of the main blade rotating shaft 14 with respect to the main blade 13 is set so as to be slightly displaced from the center of the main blade 13, or a weight (not shown) may be attached to the upper operating portion 13a. It may be because it is provided.

The operation of the air flow rate adjusting / reverse air flow preventing damper 11 having such a configuration will be described in detail below.
Note that, similarly to the description of the air flow rate adjustment damper 1, hereinafter, the wind from the right side of the drawing is referred to as a forward air flow, and the wind from the left side of the drawing is referred to as a reverse air flow. Also, the description of the small air flow rate, the medium air flow rate, the atmospheric air flow rate, the air flow rate, the wind, and the like relate to the forward air flow.

<No wind and small air flow rate> Since the upper working part 13a side of the main blade 13 is heavier than the lower working part 13b side,
When the inside of the air supply duct f is in a windless state or when the air flow rate is small, the main blades 13 are rotated counterclockwise until they come into contact with the stopper 20 when the air flow rate is low.
0, the main blade 13 is positioned so as to be substantially horizontal as shown in FIG. Further, the auxiliary blade 15 has not reached the critical air flow rate away from the auxiliary blade stopper 16,
The auxiliary blade 15 is still hanging down. As a result, the wind blows through the space above the main blade 13.

<Transition from a small air flow rate to a medium air flow rate> When the air flow rate inside the air supply duct f increases and the small air flow rate transitions to the medium air flow rate, the auxiliary blade 15 is provided. The wind pressure above the value will be received from the right side. And
As shown in FIG. 12, when the auxiliary blade 15 reaches the critical air flow rate away from the auxiliary blade stopper 19, the auxiliary blade 5 rotates clockwise around the auxiliary blade rotation shaft 16,
A gap is created between the auxiliary blade 15 and the lower inner surface of the frame member 12. As a result, the wind blows through the upper space of the main blade 13 and the lower space of the auxiliary blade 5. Further, the wind receiving portion 7 formed on the main blade 13 is pushed up by the auxiliary blade 5, so that the main blade 3 rotates clockwise.

<Transition from Medium Air Flow Rate to Atmospheric Air Flow Rate> The main blade 13 rotates clockwise and the upper operation part 1 of the main blade 13 moves.
When 3a goes up a little, as shown in FIG. 13, the upper space of the main blade 13 inside the frame member 12 becomes narrower from the right side to the left side. As a result, the flow velocity of the wind passing through the upper cloth space gradually increases from the right side to the left side, and a lift force larger than that acting on the lower operation part 13b acts on the upper operation part 13a. Therefore, when the lift reaches the critical air flow rate for rotating the main blade 13, the main blade 13 rotates clockwise. When the flow rate of the air flowing inside the air supply duct f further increases and the flow rate changes from the medium air flow rate to the atmospheric flow rate, the main blade 13 further rotates clockwise.

<Transition from atmospheric flow rate to strong flow rate> When the flow rate of the air flowing through the air supply duct f further increases and the atmospheric flow rate shifts to the strong flow rate, the main blade 13 further rotates clockwise. The main blade 13 is likely to hit the main blade stopper 18 due to the rotation, and the air flow rate passing above and below the main blade 13 is significantly reduced. Then, the lift force received by the upper operation unit 13a and the lower operation unit 13b becomes smaller and the difference in the lift forces becomes smaller, and the main blade 13 rotates slightly counterclockwise to slightly increase the air flow rate passing above and below the main blade 13. Increase to. As a result, the upper operation unit 13a is again activated.
Is lifted, the main blade 3 is rotated slightly clockwise, and the air flow rate passing above and below the main blade 13 is reduced. After that, these operations are repeated while gradually decreasing, and the air flow rate becomes stable (see FIG. 14).

<At the time of reverse air flow> At the time of reverse air flow, as shown in FIG. 15, air traps are generated in the lower space of the upper operation part 13a, and the lower surface of the upper operation part 13a receives wind pressure and rises to the end. Specifically, as shown in FIG. 16, the main blade 13 rotates clockwise until it comes into contact with the main blade stopper 18, and the main blade 13 and the auxiliary blade 15 close the frame member 12. Therefore, the flow rate of air passing through the air supply duct f becomes substantially zero, and backflow is prevented.

Further, modified examples of the air flow rate adjusting / backflow preventing damper 11 are shown in FIGS. 17 (a), 17 (b) and 1
8 (a) and FIG. 18 (b). The same components as those of the air flow rate adjusting damper 1 are designated by the same reference numerals, and the description thereof will be omitted.

In FIGS. 17 (a) and 17 (b),
An air blower 7 is formed on the auxiliary blade 5 through a support 7a. As a result, even when the air flow rate is small, the auxiliary blade 5
The pressure loss can be reduced by rotating the to facilitate the air flow.

In FIGS. 18 (a) and 18 (b),
By bending the upper operation portion 3b and the lower operation portion 3a, the main blade 3 is formed with the first air receiving portion 7a and the second air receiving portion 7b. As a result, even when the air flow causes an excessive ventilation volume at the time of a strong air flow rate, the first blower section 7a and the second blower section 3a receive wind pressures, thereby causing the main blades 3 to move. , The air supply duct f
It can be rotated so that the amount of air passing through the inside is almost zero.

According to this embodiment, the following effects can be obtained. When the wind A acts on the high-rise house a, the wind A1 passing directly above the high-rise house causes the negative pressure on the high-rise house a1 as compared with the void space b, and heat from the dwelling unit e to the void space b. As a result, the ascending airflow B is generated in the void space b. When the rising airflow B is generated, the void space b has a negative pressure as compared with the outside a2 of the high-rise house, and the void space b
There is a pressure difference between the outside of the high-rise housing and a2. Then, due to the pressure difference, an airflow from the exterior a2 side of the high-rise housing to the dwelling unit e side is induced in the air supply duct f, and in the exhaust duct g from the dwelling unit e side to the void space b. The airflow to the side is guided.

At this time, the air flow rate adjusting damper 1 adjusts the air flow rate flowing into the air supply duct f from the outside a2 side of the high-rise house. Further, the air flow rate adjustment / backflow prevention damper 11 adjusts the air flow rate flowing out from the exhaust duct g to the void space b side, and
Backflow of the airflow is prevented. That is, in the high-rise house a,
Even when the wind A acts from one direction, it is possible to ventilate the entire high-rise house a and adjust the ventilation amount within a predetermined range to improve the indoor environment.

When the wind A acts on the high-rise house a, the outside a2 of the high-rise house on the leeward side has a negative pressure compared to the void space b, and the void space lower part b2 and the high-rise house outside a2 on the leeward side. There is a pressure difference between the two. Then, due to the pressure difference, in the lower exhaust duct h, the outside a2 of the high-rise housing is located from the void space b1 side to the leeward side
The airflow to the side is guided. At this time, the backflow prevention damper 21 prevents the backflow of the airflow from the exhaust duct h to the leeward side of the high-rise residential exterior a2.

That is, the ascending air current B generated in the void space b1 by increasing the negative pressure inside the void space b1.
It becomes possible to increase the pressure difference between the void space b and the outside a2 of the high-rise house by promoting the above. Therefore, an air flow from the outside a2 side of the high-rise housing to the dwelling unit e side is guided in the air supply duct f, and an air flow from the dwelling unit e side to the void space b side is guided in the exhaust duct g. It becomes possible to do so more reliably.

The air flow rate adjusting damper 1 is rotated in a direction in which the main blades 5 receive wind pressure and lift force as the wind pressure increases and the main blades 3 decrease the air flow rate passing through the air supply duct f. By doing so, the flow rate of the air passing through the air supply duct f is adjusted within a predetermined range.

That is, the air flow rate adjusting damper 1 is
The flow rate of the air passing through the air supply duct f can be adjusted within a predetermined range, and since the structure is relatively simple, the manufacturing cost can be suppressed and the installation space can be reduced. It can be small, and it is possible to increase the degree of freedom of the installation position.

The air flow rate adjustment / reverse air flow adjustment damper 1
1 indicates that the auxiliary vane 15 has the exhaust duct g during the forward air flow.
The main blade 13 receives the wind pressure and the lift force as the wind pressure increases, and the main blade 13 reduces the air flow rate passing through the exhaust duct g. By rotating in the direction, the flow rate of air passing through the exhaust duct g is adjusted within a predetermined range. Further, the air flow rate adjustment / reverse air flow adjustment damper 11
During the reverse air flow, the auxiliary duct 5 cooperates with the main vane 13 which receives wind pressure and rotates in a direction to reduce the flow rate of the air passing through the exhaust duct g.
The backflow is prevented by setting the air flow rate inside to almost zero.

That is, the air flow rate adjustment / reverse air flow prevention damper 11 can adjust the air flow rate passing through the exhaust duct g within a predetermined range, and also prevents the reverse air flow within the exhaust duct g. It is possible. further,
The air flow rate adjustment / reverse air flow prevention damper 11 has an integrated air flow rate adjustment damper and a reverse air flow prevention damper, and has a relatively simple structure, so that the manufacturing cost can be suppressed. At the same time, the installation space is small, and the degree of freedom of the installation position can be increased.

In this embodiment, the frame member 2 has a cylindrical shape, but it may have an elliptic cylindrical shape or a rectangular cylindrical shape, and the main blades 3 and the auxiliary blades 5 have the same shape as the frame member 2. It can be appropriately changed according to the shape. Further, although the main blade 3 has a disc shape, it may have an elliptical plate shape. Further, the auxiliary blade 5 may also have a shape obtained by dividing an elliptical plate into two.

In the present embodiment, a high-rise house having a substantially square shape as a plan has been described.
The plan plan is not particularly limited as long as a void space that communicates with the roof is provided inside the building. For example, the plan plans shown in FIGS. 19A to 19D may be used. Is. Furthermore, the use of the building is not particularly limited to a house, and for example, an office,
Various applications such as hotels, commercial facilities, hospitals, etc. can be considered.

[0068]

According to the invention of claim 1, in a building,
Even if the wind acts from one direction, it is possible to ventilate the entire building and adjust the ventilation amount within a predetermined range to improve the indoor environment.

According to the invention described in claim 2, not only the same effect as that of the invention described in claim 1 can be obtained, but also the negative pressure inside the void space is increased to generate in the void space. It is possible to promote the ascending air current and increase the pressure difference between the void space and the outside of the building. Therefore, it is more certain to guide the air flow from the building exterior side to the building interior side in the air supply duct, and to guide the air flow from the building interior side to the void space side through the exhaust port. It will be possible to do

According to the third aspect of the invention, the same effect as that of the first aspect of the invention can be obtained, and the air flow rate adjusting damper allows the air flow rate passing through the duct to fall within a predetermined range. Can be adjusted, and the relatively simple structure makes it possible to reduce the manufacturing cost, the installation space can be small, and the degree of freedom of the installation position can be increased. It is possible.

According to the fourth aspect of the invention, the same effect as that of the first or second aspect of the invention can be obtained, and the air flow rate adjusting / reverse air flow preventing damper passes through the duct. It is possible to adjust the air flow rate within a predetermined range and prevent the reverse air flow in the duct. Further, since the air flow rate adjustment / backflow prevention damper has the airflow adjustment damper and the backflow prevention damper integrated, and has a relatively simple structure, it is possible to suppress the manufacturing cost. Along with
The installation space is small, and the degree of freedom in the installation position can be increased.

[Brief description of drawings]

FIG. 1 is a sectional view of a high-rise house showing an embodiment of a ventilation system according to the present invention.

FIG. 2 is a plan view of a high-rise house showing an embodiment of a ventilation system according to the present invention.

FIG. 3 is a model view of a cross section of a dwelling unit of a high-rise house showing an embodiment of a ventilation system according to the present invention.

FIG. 4 is a perspective view and (b) is a model view showing an example of an air flow rate adjusting damper according to the present invention.

5 is a model diagram showing a state of blades of the air flow rate adjustment damper shown in FIG. 4 at a small air flow rate.

FIG. 6 is a model diagram showing a state of the blades at a medium air flow rate.

FIG. 7 is a model diagram showing the state of the blades when the air flow rate is the same.

FIG. 8 is a model diagram showing the state of the blades when the flow rate is strong.

9 shows another example of the air flow rate adjusting damper according to the present invention different from the example shown in FIG. 4, (a) is a perspective view, FIG.
(B) is a model diagram.

FIG. 10 is a perspective view and (b) is a model view showing an example of an air flow rate adjusting / backflow preventing damper according to the present invention.

11 is a model diagram showing the state of the blades of the air flow rate adjustment / reverse air flow prevention damper shown in FIG. 10 at a small air flow rate.

FIG. 12 is a model diagram showing a state of the blade when the medium air flow rate is the same.

FIG. 13 is a model diagram showing a state of the blade when the air flow rate is the same.

FIG. 14 is a model diagram showing the state of the blades when the flow rate of the air is strong.

FIG. 15 is a model diagram showing a state of the blades in the initial stage of the reverse air flow.

FIG. 16 is a model diagram showing the state of the vanes in the same state when there is no air flow during the reverse air flow.

FIG. 17 shows an air flow rate adjusting damper according to the present invention, FIG.
(A) is a perspective view showing another example different from the example shown in FIG.
(B) is a model diagram.

FIG. 18 is a view showing an air flow rate adjusting damper according to the present invention, FIG.
0, another example different from the example shown in FIG. 17, (a) is a perspective view, and (b) is a model view.

FIG. 19 is a diagram showing a plan plan of another example of the building in which the ventilation system according to the present invention is used, which is different from the example shown in FIG. 1 and the like.

FIG. 20 is a model diagram showing an example of a conventional ventilation system.

[Explanation of symbols]

a High-rise house (building) a1 Directly above the high-rise housing (directly above the building) a2 High-rise housing outside (outside the building) b void space b1 Lower void space c Shared corridor d balcony e Dwelling unit (inside the building) f Air supply duct (duct) g Exhaust duct (duct) h Lower exhaust duct A wind B updraft 1 Air flow rate adjustment damper 2, 12 frame members 3,13 Main blade 4,14 Main blade rotation axis 5 auxiliary blades 6 Auxiliary blade rotation axis 11 Air flow rate adjustment / backflow prevention damper 21 Backflow prevention damper

Continued front page    (72) Inventor Shuji Shirota             Nishimatsuken 1-20-10 Toranomon, Minato-ku, Tokyo             Inside the corporation (72) Inventor Yasuyuki Kobayashi             Nishimatsuken 1-20-10 Toranomon, Minato-ku, Tokyo             Inside the corporation (72) Inventor Masaki Kojima             Nishimatsuken 1-20-10 Toranomon, Minato-ku, Tokyo             Inside the corporation (72) Inventor Naohiro Yoshida             Nishimatsuken 1-20-10 Toranomon, Minato-ku, Tokyo             Inside the corporation (72) Inventor Toshio Sadamasa             2-2-2 Jonanjima, Ota-ku, Tokyo Stocks             Company Unix (72) Inventor Osamu Oguni             2-2-2 Jonanjima, Ota-ku, Tokyo Stocks             Company Unix F-term (reference) 2E001 DB02 FA18 FA24 NA02 NC02                 3L058 BA01 BB09 BC03                 3L081 AA03 AB02 FA07 HA02

Claims (4)

[Claims] 1. A ventilation system for ventilating indoors and outdoors in a multi-storey building having a void space communicating with a rooftop, wherein the building is provided with an air supply duct communicating from the exterior of the building to the interior of the building. Along with that, an exhaust duct leading from the inside of the building to the void space is formed, and the air supply duct has an air flow rate adjustment damper for adjusting the air flow rate from the outside of the building to the void space side. The exhaust duct is provided with an air flow rate adjustment / reverse air flow prevention damper for adjusting the air flow rate from the outside of the building to the void space side and for preventing the back flow of the air flow. Due to the wind passing directly above the building, the area directly above the building has a negative pressure compared to the void space, and the heat generated in the void space from the building causes To generate an updraft in the void space, and the updraft creates a negative pressure in the void space compared to the outside of the building, by utilizing the pressure difference between the void space and the outside of the building ,
A ventilation system, which guides an air flow from the outside of the building to the inside of the building in the air supply duct, and guides an air flow from the inside of the building to the void space side in the exhaust duct. . 2. The ventilation system according to claim 1, wherein a lower exhaust duct communicating from the lower portion of the void space to the outside of the building is formed in the building, and the lower exhaust duct is provided from a lower side of the void space. A backflow prevention damper is provided to prevent backflow of airflow toward the outside of the building, and the outside of the building on the leeward side has a lower negative pressure than the lower part of the void space and the lower part of the void space. A ventilation system, wherein a pressure difference with the outside of the building on the leeward side is utilized to induce an air flow in the exhaust duct from the lower side of the void space toward the outside of the building on the leeward side. 3. The ventilation system according to claim 1, wherein the air flow rate adjusting damper is connected to a duct and constitutes a part of the duct, and a main blade orthogonal to an axial direction of the duct. A main blade that is rotatable about a rotation axis, and the main blade receives wind pressure and lift force as the air flow rate flowing into the duct increases, and the main blade passes through the duct. The ventilation system is characterized in that the air flow rate passing through the duct is adjusted within a predetermined range by rotating the air flow direction in a direction to reduce the air flow rate. 4. The ventilation system according to claim 1, wherein the air flow rate adjusting / reverse air flow preventing damper is connected to a duct to form a part of the duct, and an axis line of the duct. A main blade rotatable about a main blade rotation axis orthogonal to the direction; and an auxiliary blade rotatable about an auxiliary blade rotation axis substantially coincident with the main blade rotation axis. During normal air flow, the auxiliary vanes rotate in a direction to increase the air flow rate passing through the duct, and the main vanes receive wind pressure and lift force as the air flow rate flowing into the duct increases. By rotating the main blades in a direction that reduces the air flow rate that passes through the duct, the air flow rate that passes through the duct is adjusted within a predetermined range. Inside the duct Ventilation system in cooperation with a main blade which rotates in the direction of decreasing the air flow, characterized in that it prevented almost to zero flow back airflow passing through the said duct over to.