JP7442681B2 - Shutter device and ventilation device - Google Patents

Description

The present invention relates to a shutter device used in a ventilation device having an air supply air path and an exhaust air path, and a ventilation device equipped with the shutter device.

In a ventilation system that is equipped with an air supply path that brings outside air into the room, an exhaust air path that exhausts indoor air to the outside, and a fan that promotes the flow of air in these air paths, the air supply will be interrupted when the ventilation system is stopped. If the airflow path and exhaust airflow path are left open, external air may enter the ventilation system due to wind blowing into the ventilation system from the outside or the pressure difference between indoors and outdoors, causing condensation inside the ventilation system, or causing insects to enter the ventilation system. Foreign objects such as may get in.

In order to prevent these, a shutter may be provided that opens the supply air passage and the exhaust air passage when the ventilation device is in operation, and closes each air passage when it is stopped. As a means for opening and closing such a shutter, there is a structure that uses an electric motor or the like to automatically open and close according to the operation/stop of the ventilation device, but the structure is complicated and the cost is high. In addition, there are devices that allow the user to manually open and close the shutter, but if the user forgets to close the air duct when the ventilation system is stopped, the air duct remains open. .

As a solution to these problems, for example, Patent Document 1 discloses a shutter that is pushed up by wind pressure due to the rotation of an impeller when a ventilation fan is in operation to open an exhaust air passage, and closes the exhaust air passage by its own weight when the ventilation fan is stopped. ing. According to this shutter, since no electric motor is used, the structure is not complicated, and when the user operates or stops the ventilation fan, there is no need to open or close the shutter, so the user forgets to close the shutter. An open air path condition due to this will not occur.

JP2012-97982A

The shutter disclosed in Patent Document 1 opens and closes an exhaust air passage. In the exhaust air path, the direction of the airflow that is desired to flow when the ventilation fan is in operation is different from the direction of the airflow that is desired to be blocked when the ventilation fan is stopped. Therefore, by configuring the shutter to open due to wind pressure from one direction and not open due to wind pressure from the other direction as described above, the exhaust air path is opened when the ventilation fan is operating, and the exhaust air path is blocked when the ventilation fan is stopped. This function can be realized.

On the other hand, in the air supply air path, the direction of the airflow that is desired to flow when the ventilation fan is in operation is the same as the direction of the airflow that is desired to be blocked when the ventilation fan is stopped. If you install a shutter in the air supply path that opens with the wind pressure of the airflow in the direction you want the airflow to flow, it will open even with the wind pressure of the airflow in the direction you want to block, and when the ventilation fan stops, air or foreign matter will come in from outside. It is not possible to prevent the air from flowing into the ventilation fan.

The present disclosure has been made to solve the above-mentioned problems, and even in the supply air path where the direction of the airflow that you want to flow when the ventilation device is in operation and the direction of the airflow that you want to cut off when the ventilation device is stopped are the same, the electric motor or The purpose of the present invention is to obtain a shutter that can open an air supply path when a ventilation system is in operation and shut off the air supply path when the ventilation system is stopped, without requiring any operation by a user.

The shutter according to the present disclosure includes an air supply air path through which air is supplied from an external air supply port connected to the outside to an air supply port of a ventilation device, and air is discharged from an exhaust port of the ventilation device arranged in line with the air supply port. The main body has an exhaust air passage that allows air to flow to an external exhaust port connected to the outdoors, and is rotatably supported by a rotating shaft provided on the main body, and the air supply air passage is rotated in a direction away from the external air intake. An air supply shutter that opens and rotates in a direction toward the external air supply port to block the air supply air path, and an air supply shutter that is rotatably supported by a rotating shaft on which the air supply shutter is supported and rotates in a direction away from the external exhaust port. The air supply shutter blocks the exhaust air passage when rotated toward the external air intake port, and opens the exhaust air passage when the air intake shutter rotates toward the external air intake port. The moment generated when the exhaust shutter receives the wind pressure of the air flowing through the exhaust air passage from the external exhaust port toward the exhaust port is larger than the moment generated when the exhaust shutter receives the wind pressure of the air flowing through the exhaust air passage.

A shutter device according to the present disclosure includes an air supply shutter and an exhaust shutter that are rotatably supported on a rotation shaft provided in a main body, and the air supply shutter is directed toward an air supply air path from an external air supply port to an air supply port. The moment generated when the exhaust shutter receives the wind pressure of the air flowing through the exhaust air passage from the external exhaust port toward the exhaust port is larger than the moment created when the exhaust shutter receives the wind pressure of the air flowing through the exhaust air passage. As a result, when the ventilation system is stopped and there is an air flow flowing in from the external air supply port and external exhaust port, the moment generated at the exhaust shutter becomes dominant over the air supply shutter, and the moment generated at the exhaust shutter causes the air supply shutter, The exhaust shutter also rotates in the direction of blocking each air path. By having the above configuration, even if there is airflow that attempts to flow into the ventilation system through the external air supply port and external exhaust port when the ventilation system is stopped, the exhaust air path and the air supply air path are blocked, and the external air Alternatively, it is possible to prevent foreign matter from flowing into the ventilation device.

A cross-sectional view showing the configuration of a ventilation device and a shutter device in Embodiment 1 A cross-sectional view showing the configuration of a shutter device in Embodiment 1 A cross-sectional view showing the configuration of a shutter device in Embodiment 2 A cross-sectional view showing the configuration of a shutter device in Embodiment 2 A cross-sectional view showing the configuration of a shutter device in which the external air supply port is positioned close to the rotation axis in Embodiment 1. A cross-sectional view showing the configuration of a shutter device in which the external air supply port is positioned close to the rotation axis in Embodiment 1. A cross-sectional view showing the configuration of a shutter device in which the opening area of the external air supply port is smaller than the opening area of the external air exhaust port in Embodiment 1. A cross-sectional view showing the configuration of a shutter device in which a spring is provided in the air supply shutter or the exhaust shutter in Embodiment 1. A cross-sectional view showing the configuration of a shutter device in which an exhaust shutter is provided with rubber in Embodiment 1.

Embodiment 1.
FIG. 1 is a cross-sectional view showing the configuration of a ventilation device 1 and a shutter device 2 in the first embodiment. The ventilation system 1 and the shutter device 2 are installed on the ceiling of the room, and the indoor air supply port 3 and the return air port 4 located on the upper side of the figure are connected to a duct leading into the room, and the indoor air supply port 3 and the return air port 4 located on the lower side of the figure The outside air port 5 and the ventilation/exhaust port 6 are connected to a duct leading to the outside.
The ventilation device 1 includes an outside air port 5 that takes air from outside into the ventilation device 1, and an indoor air port that communicates with the outside air port 5 through a ventilation air supply air path 7 and supplies the air taken in from the outside air port 5 into the room. An air supply port 3 , a return air port 4 that takes in return air from the room, and a ventilation exhaust air passage 8 that communicates with the return air port 4 to direct the indoor air taken in from the return air port 4 to the outside of the ventilation system 1 . It has a ventilation exhaust port 6 for exhausting air. The outside air port 5 and the ventilation/exhaust port 6 are arranged side by side.
The ventilation air supply air path 7 is provided with an air supply fan 9 that generates airflow from the outside air port 5 toward the indoor air supply port 3, and the ventilation exhaust air path 8 is provided with an air flow from the return air port 4 to the ventilation exhaust port 6. An exhaust fan 10 is provided which generates an airflow towards.
In addition, a heat exchanger 11 is provided in the middle of each of the ventilation air supply air path 7 and the ventilation air exhaust air path 8 to exchange heat with each other without mixing the air flowing through the ventilation air supply air path 7 and the ventilation air exhaust air path 8. The ventilation device 1 is a ventilation device with a heat exchange function.

A shutter device 2 is integrally attached to this ventilation device 1. The main body 12 of the shutter device 2 has an external air supply port 13 that connects to the outdoors and takes in air from outside, and an air supply path 14 that guides the air taken in from the external air supply port 13 to the external air port 5 of the ventilation device 1. have. Furthermore, the main body part 12 includes an exhaust air passage 15 that guides air discharged from a ventilation exhaust port 6 arranged in line with the outside air opening 5, and an external exhaust air passage that exhausts the air guided to the exhaust air passage 15 to the outside. It has a mouth 16.

Inside the air supply air passage 14, there is a flat air supply shutter 17 that is rotatably supported by a rotating shaft 18 provided in the main body 12, and this air supply shutter 17 is rotated in a direction approaching the external air supply port 13. A blocking plate 19 is provided which contacts the air supply air passage 14 together with the air supply shutter 17 in the closed state. That is, as described above, the air supply shutter 17 rotates in the direction approaching the external air supply port 13 and blocks the air supply air path 14 while coming into contact with the blocking plate 19, and in the direction away from the external air supply port 13. The air supply air passage 14 is opened in a state in which the air supply air passage 14 is rotated and separated from the blocking plate 19 to create a gap.

A flat exhaust shutter 20 is provided in the exhaust air passage 15 and is rotatably supported by a rotating shaft 18 on which an air supply shutter 17 is supported. The air supply shutter 17 and the exhaust shutter 20 are integrally formed and rotatably supported on the same rotating shaft 18, so that when they rotate, they rotate in conjunction in the same direction. In addition, since the air supply shutter 17 and the exhaust shutter 20 are formed with the rotating shaft 18 in between, the moving directions during rotation are opposite to each other. For example, when rotating clockwise in FIG. 1, the air supply shutter 17 moves upward, and the exhaust shutter 20 moves downward.

Further, in the exhaust air passage 15, an exhaust shutter stopper is provided which abuts the exhaust shutter 20 while rotating in a direction approaching the external exhaust port 16 and restricts the rotation of the exhaust shutter 20 from further rotation. A stopper 21 is provided. That is, the exhaust shutter 20 rotates in a direction approaching the external exhaust port 16 and comes into contact with the stopper 21 to open the exhaust air path with a gap maintained in the middle of the exhaust air path 15. When rotated in a direction away from the air, the ventilation exhaust port 6 is closed and the exhaust air passage 15 is blocked.

The exhaust shutter 20 applies a moment larger than the moment generated when the air supply shutter 17 receives the wind pressure of the air flowing through the air supply air path 14 from the external air supply port 13 toward the outside air port 5 to ventilate the air from the external exhaust port 16. It is configured to be generated in response to the wind pressure of the air flowing through the exhaust air passage 15 toward the exhaust port 6. Specifically, the area of the flat exhaust shutter 20 located within the exhaust air path 15 is configured to be larger than the area of the flat air supply shutter 17 located within the air supply air path 14. When airflows with the same wind speed flow into the supply air passage 14 and the exhaust air passage 15, the larger the area that receives the airflow, the greater the force received. The moment generated on the exhaust shutter 20 when the exhaust shutter 20 receives the wind pressure of the air flowing in the exhaust air passage 15 is larger than the moment generated on the air intake shutter 17 when the exhaust shutter 20 receives the wind pressure of the air flowing in the exhaust air passage 15. .

Next, the operations of the ventilation device 1 and the shutter device 2 configured in this way will be explained. Figure 1 shows a state in which the ventilation system 1 is operating, the air supply fan 9 and the exhaust fan 10 are rotating, and airflows are generated in the ventilation air supply air path 7 and the ventilation air exhaust air path 8 as shown by the arrows, respectively. It shows. As the air supply fan 9 rotates, negative pressure is generated on the outside air port 5 side of the ventilation device 1, and this negative pressure causes air to be directed from the external air supply port 13 to the outside air port 5 in the air supply air path 14 of the shutter device 2. Airflow occurs. The wind pressure caused by this airflow exerts a force on the air supply shutter 17 to rotate it in a direction away from the external air supply port 13, that is, in a counterclockwise direction in FIG. Further, as the exhaust fan 10 rotates, an air current is generated in the ventilation exhaust port 6 of the ventilation device 1 to exhaust air to the outside, so that the exhaust air path 15 of the shutter device 2 is operated from the ventilation exhaust port 6 to the outside. An airflow toward the exhaust port 16 is generated. The wind pressure caused by this airflow acts on the exhaust shutter 20 to rotate it in a direction toward the external exhaust port 16, that is, in a counterclockwise direction in FIG. 1. At this time, since a force is applied to the air supply shutter 17 and the exhaust shutter 20 to rotate them in the same rotational direction, both shutters rotate counterclockwise in FIG. 1. Then, the exhaust shutter 20 rotates in a direction approaching the external exhaust port 16, and when it comes into contact with the stopper 21, the rotation is restricted, and the air supply shutter 17 and the exhaust shutter 20 stop rotating.

As a result of such an operation, the air supply shutter 17 rotates in a direction away from the external air supply port 13, and is separated from the blocking plate 19, which is the air supply air path blocking member, creating a gap, and the air supply air is blocked. At the same time as opening the passage 14, the exhaust shutter 20 rotates in a direction approaching the external exhaust port 16 to open the exhaust air passage 15 while maintaining a gap in the middle of the exhaust air passage 15.
As described above, when the ventilation device 1 is in operation, this shutter device 2 utilizes the wind pressure generated by the ventilation device 1 to operate both the air supply shutter 17 and the exhaust shutter 20 in the air supply air path 14 and the exhaust air path. 15 is opened so as not to obstruct the supply of outside air and the exhaust of indoor air.

Next, an explanation will be given of the operation when there is an airflow flowing into the ventilation apparatus 1 due to an environment such as a difference in air pressure between indoors and outdoors when the ventilation apparatus 1 is stopped. FIG. 2 is a cross-sectional view of the shutter device 2 when the ventilation device 1 is stopped. When the ventilation device 1 is stopped and an airflow tries to flow into the ventilation device 1 through the external air supply port 13 and the external exhaust port 16, the external air supply port is generated in the air supply air path 14 of the shutter device 2. An airflow is generated from the external air outlet 13 toward the outside air port 5, and an airflow is generated from the external exhaust port 16 toward the ventilation exhaust port 6 in the exhaust air path 15. These airflows act on the air supply shutter 17 to rotate it in the direction away from the external air supply port 13, that is, in the counterclockwise direction in FIG. That is, in FIG. 1, a force to rotate clockwise is applied. In other words, forces are applied to the air supply shutter 17 and the exhaust shutter 20 to rotate them in different directions.
At this time, since the area of the exhaust shutter 20 is larger than the area of the air supply shutter 17, when airflows of the same wind speed flow into the air supply air passage 14 and the exhaust air passage 15, the air supply shutter 17 moves inside the air supply air passage 14. This is because the moment generated in the exhaust shutter 20 when the exhaust shutter 20 receives the wind pressure of the air flowing in the exhaust air passage 15 is larger than the moment generated on the air supply shutter 17 when the exhaust shutter 20 receives the wind pressure of the flowing air. , the force that rotates the exhaust shutter 20 clockwise is greater than the force that rotates the air intake shutter 17 counterclockwise. As a result, the air supply shutter 17 and the exhaust shutter 20, which are integrally formed, are rotatably supported on the same rotating shaft 18, and rotate in conjunction with each other, both rotate clockwise. Then, when the air supply shutter 17 rotates in a direction approaching the external air supply port 13 and comes into contact with the blocking plate 19, which is an air supply shutter stopper and an air supply air path blocking member, the rotation is regulated, as shown in FIG. In this state, the air supply shutter 17 and the exhaust shutter 20 stop rotating. At this time, in the exhaust air passage 15, the exhaust shutter 20 comes into contact with the main body part 12 of the shutter device 2, which is an exhaust air passage blocking member that blocks the ventilation exhaust port 6.

As a result of this operation, the air supply shutter 17 rotates in a direction approaching the external air supply port 13 and comes into contact with the blocking plate 19 to block the air supply air path 14, and the exhaust shutter 20 closes to the external air exhaust port. It rotates in a direction away from 16 to block the ventilation exhaust port 6 and block the exhaust air path 15.
As described above, if there is an airflow flowing into the ventilation apparatus 1 from outside when the ventilation apparatus 1 is stopped, this shutter device 2 uses the wind pressure of the airflow that is about to flow in to supply air. Both the air shutter 17 and the exhaust shutter 20 operate to block the air supply air path 14 and the exhaust air path 15 to prevent outside air from entering the inside of the ventilation device 1.

As described above, in the shutter device 2 of the first embodiment, since the area of the exhaust shutter 20 is larger than the area of the air supply shutter 17, when airflows of the same wind speed flow into the air supply air path 14 and the exhaust air path 15, , the moment generated in the air supply shutter 17 due to the air supply shutter 17 receiving the wind pressure of the air flowing in the air supply air path 14 is greater than the moment generated in the air supply shutter 17 due to the wind pressure of the air flowing in the exhaust air path 15 being received by the exhaust shutter 20. The moment generated at the shutter 20 becomes larger. As a result, even if there is airflow that attempts to flow into the ventilation system through the outside air port 5 and the ventilation/exhaust port 6 when the ventilation system is stopped, the supply air path 14 and the exhaust air path 15 are blocked by wind pressure, and the outside air Alternatively, it is possible to prevent foreign matter from flowing into the ventilation device 1.

Embodiment 2.
In the first embodiment, the air supply shutter 17 made of one flat plate is provided in the air supply air passage 14 of the shutter device 2, and the exhaust shutter 20 made of one flat plate is provided in the exhaust air passage 15. In this case, each shutter needs to have a sufficient area to receive wind pressure to the extent that it generates rotational force, but on the other hand, the larger the area, the more difficult the airflow will be when opening the supply air passage 14 and the exhaust air passage 15. It becomes a hindrance. In the second embodiment, the air supply shutter 17 and the exhaust shutter 20 can receive sufficient wind pressure to generate the same rotational force as in the first embodiment, and the air supply air passage 14 and the exhaust air passage 15 are opened. A configuration that allows airflow to flow smoothly and reduce pressure loss will be described below.

3 and 4 are cross-sectional views of the shutter device 2 in Embodiment 2, with FIG. 3 showing when the ventilation device 1 is in operation, and FIG. 4 showing when the ventilation device 1 is stopped.
As shown in FIGS. 3 and 4, the shutter device 2 includes an auxiliary air supply shutter 22 in the air supply air path 14 and an auxiliary exhaust shutter 23 in the exhaust air path 15, and the other parts are as shown in the embodiment. This is similar to the ventilation device 1 and shutter device 2 of No. 1.

An air supply window 24 and a rotating shaft 25 are provided on the blocking plate 19, which is an air supply air path blocking member, and an auxiliary air supply shutter 22 is rotatably provided on the rotating shaft 25. Further, a first protrusion 26 extending toward the outside air port 5 is provided at the tip of the air supply shutter 17 on the opposite side to the rotation shaft 18 . Furthermore, an L-shaped second protrusion 27 extending toward the air supply shutter 17 is provided at a portion of the auxiliary air supply shutter 22 that is supported by the rotation shaft 25 . As shown in FIG. The second protrusion 27 is configured to be in contact with the protrusion 26, and in this state, rotation of the second protrusion 27 toward the first protrusion 26 is restricted. Therefore, in the state shown in FIG. 4, the rotation of the auxiliary air supply shutter 22 is also restricted.

Note that the auxiliary air supply shutter 22 is provided with a spring (not shown) as a window blocking elastic body that applies a force to rotate the auxiliary air supply shutter 22 in a direction toward the external air supply port 13 . The rotational force applied by this spring is enough to rotate the auxiliary air supply shutter 22 in the direction approaching the external air supply port 13 in a windless state, and the rotational force applied by this spring is enough to rotate the auxiliary air supply shutter 22 in the direction approaching the external air supply port 13. The rotational force is adjusted to be weaker than the generated force.
Further, the exhaust shutter 20 is provided with an exhaust window 28 and a rotating shaft 29, and the rotating shaft 29 blocks the exhaust air passage 15 when rotated in a direction away from the external exhaust port 16. An auxiliary exhaust shutter 23 is rotatably provided, which opens the exhaust air passage 15 when rotated in the approaching direction.

The operation of the shutter device 2 configured in this way will be explained. Figure 3 shows a state in which the ventilation system 1 is in operation, the air supply fan 9 and the exhaust fan 10 are rotating, and airflows as shown by arrows are generated in the ventilation air supply air path 7 and the ventilation air exhaust air path 8, respectively. It shows. As in the first embodiment, the wind pressure caused by the airflow generated by the rotation of the air supply fan 9 causes the air supply shutter 17 to move away from the external air supply port 13 and the exhaust shutter 20 to approach the external air exhaust port 16. A rotating force acts in each direction, and both shutters rotate in the counterclockwise direction in FIG. 3. As a result, as in the first embodiment, the air supply shutter 17 opens the air supply air passage 14, and the exhaust shutter 20 opens the exhaust air passage 15.

Furthermore, when the air supply shutter 17 begins to rotate and separates from the blocking plate 19, the first protrusion 26 separates from the second protrusion 27, so the rotation of the auxiliary air supply shutter 22 is not restricted, and the external air supply port Due to the airflow from the external air supply port 13 toward the external air port 5, the auxiliary air supply shutter 22 also rotates in a direction away from the external air supply port 13, thereby opening the air supply window 24.
On the other hand, since the auxiliary exhaust shutter 23 is not regulated to rotate toward the external exhaust port 16, it rotates toward the external exhaust port 16 due to the airflow from the ventilation exhaust port 6 toward the external exhaust port 16. Open the exhaust window 28.
As described above, since the auxiliary air supply shutter 22 opens the air supply window 24 and the auxiliary exhaust shutter 23 opens the exhaust window 28, the area through which the airflow passes in the air supply air passage 14 and the exhaust air passage 15 increases, resulting in pressure loss. is reduced.

The rotation of both shutters in the counterclockwise direction progresses, and when the exhaust shutter 20 comes into contact with the stopper 21, the rotation is regulated, the air supply shutter 17 and the exhaust shutter 20 stop rotating, and the air supply shutter 17 closes the air supply air path. 14 and the exhaust air passage 15 are kept open by the exhaust shutter 20.

Next, the operation when the ventilation device 1 is stopped will be explained. FIG. 4 is a cross-sectional view of the shutter device 2 when the ventilation device 1 is stopped. A spring provided in the auxiliary air supply shutter 22 causes the auxiliary air supply shutter 22 to rotate in a direction approaching the external air supply port 13, thereby shielding the air supply window 24.
When the ventilation device 1 is stopped, when an airflow tries to flow into the ventilation device 1 through the external air supply port 13 and the external exhaust port 16, the auxiliary exhaust shutter 23 causes the airflow to flow inside the exhaust air path 15. It rotates toward the exhaust window 28 in response to the wind pressure of the air, and the exhaust window 28 is in a state of being blocked by the auxiliary exhaust shutter 23.
In such a state, the area of the surface formed by the air supply shutter 17 and the auxiliary air supply shutter 22 is the same as that of the air supply shutter 17 of the first embodiment, and the surface area formed by the exhaust shutter 20 and the auxiliary exhaust shutter 23 is the same. The area is the same as that of the exhaust shutter 20 of the first embodiment. Therefore, similarly to the first embodiment, both the air supply shutter 17 and the exhaust shutter 20 rotate clockwise in FIG. 4 . Then, when the air supply shutter 17 comes into contact with the blocking plate 19, the rotation is regulated, and the air supply shutter 17 and the exhaust shutter 20 stop rotating in the state shown in FIG.

In the state shown in FIG. 4, when the auxiliary air supply shutter 22 receives the wind pressure of the air flowing in the air supply air path 14, the auxiliary air supply shutter 22 receives a force that tries to rotate it in the counterclockwise direction in FIG. work. However, since the first protrusion 26 of the air supply shutter 17 and the second protrusion 27 of the auxiliary air supply shutter 22 come into contact and restrict the rotation of the auxiliary air supply shutter 22, the auxiliary air supply shutter 22 The state in which the air window 24 is shielded is maintained.

As described above, when there is an airflow flowing into the ventilation apparatus 1 from outside when the ventilation apparatus 1 is stopped, this shutter device 2 is operated by the wind pressure of the airflow attempting to flow in and the force of the spring. , each air path is blocked to prevent outside air from entering the inside of the ventilation device 1. That is, the auxiliary air supply shutter 22 and the auxiliary exhaust shutter 23 block the air supply window 24 and the exhaust window 28, and the air supply shutter 17 and the exhaust shutter 20 block the air supply air passage 14 and the exhaust air passage 15, respectively. It operates to prevent outside air etc. from entering the inside of the ventilation device 1. Further, by providing the air supply window 24 and the exhaust window 28, the area through which the airflow passes in each air path is increased, so that pressure loss is reduced and air can be supplied and exhausted more effectively.

In the above embodiments, an example is given in which the auxiliary air supply shutter 22 and the auxiliary exhaust shutter 23 are provided. A configuration in which the shutter 23 is not provided, or a configuration in which the auxiliary air supply shutter 22 is not provided in the air supply air path 14 and the auxiliary exhaust shutter 23 is provided in the exhaust air path 15 may be adopted.

Further, in each of the above embodiments, an example has been described in which the shutter device 2 is integrally attached to the ventilation device 1, but the shutter device 2 of the present disclosure is not attached integrally to the ventilation device 1; Even if it is configured separately from the device and attached to an existing ventilation device, the same effects as in the above embodiment can be achieved.

Further, in each of the above embodiments, a ventilation device equipped with a heat exchanger has been described, but the shutter device of the present disclosure can be equipped with a heat exchanger as long as it is a ventilation device equipped with an air supply air path and an exhaust air path. This can be applied even if the ventilation system is not For example, a separate air supply type ventilation device and an exhaust type ventilation device that operate in conjunction with each other may be connected to the air supply air path 14 and the exhaust air path 15 of the shutter device 2 through a duct or the like.

Further, in each of the above embodiments, an example has been described in which the external air supply port 13 is located on the right side of the bottom surface of the main body portion 12, but as shown in FIG. By configuring the external air supply port 13 closer to the rotating shaft 18 than the external air supply port 13 in the first embodiment, airflow can easily pass through the gap between the air supply shutter 17 and the blocking plate 19 when the air supply shutter 17 is open.

Furthermore, in all of the above embodiments, when there is an airflow trying to flow into the ventilation device 1, the exhaust shutter 20 is moved so that the moment generated at the exhaust shutter 20 is superior to the moment generated at the air supply shutter 17. Although the area is configured to be larger than the area of the air supply shutter 17, the configuration in which the relationship between the moments generated at each shutter is as described above is not limited to this.
For example, the distance from the tip of the exhaust shutter 20 opposite to the rotation shaft 18 to the rotation shaft 18 is longer than the distance from the tip of the air supply shutter 17 opposite to the rotation shaft 18 to the rotation shaft 18. By doing so, the above moment relationship may be established.
Alternatively, the above moment relationship can be established by appropriately setting not only the shapes of the air supply shutter 17 and the exhaust shutter 20 but also the positions and shapes of the external air supply port 13 and the external exhaust port 16. For example, as shown in FIG. 6, the area of the air supply shutter 17 and the area of the exhaust shutter 20 are made comparable, and the external air supply port 13 is positioned closer to the rotation axis 18 than the external exhaust port 16. As a result, the distance from the place where the airflow directly hits the air intake shutter 17 to the rotation axis 18 becomes shorter than the distance from the place where the airflow directly hits the exhaust shutter 20 to the rotation axis 18, and the above moment relationship is established. can be done. Alternatively, as shown in FIG. 7, the area of the air supply shutter 17 and the area of the exhaust shutter 20 are made comparable, and the distances from the rotation axis 18 of the external air supply port 13 and the external exhaust port 16 are made similar, and the external The opening area of the air supply port 13 is configured to be smaller than the opening area of the external exhaust port 16. As a result, the wind pressure of the airflow flowing in from the external air supply port 13 becomes weaker than the wind pressure of the airflow flowing in from the external exhaust port 16, so that the above moment relationship can be established.

As described above, by appropriately setting multiple factors such as the shape and position of the air supply shutter 17, exhaust shutter 20, external air supply port 13, and external exhaust port 16, the moment generated in the air supply shutter 17 can be The shutter device 2 is configured so that the moment generated at the shutter 20 becomes large.

Note that a configuration may be added to maintain the state in which the air supply shutter 17 and the exhaust shutter 20 block each air path when there is no airflow flowing into the ventilation device 1. FIG. 8(a) is a cross-sectional view when a spring 30 that presses the air supply shutter 17 downward is provided near the rotation axis 18 of the main body 12 of the shutter device 2 in Embodiment 1, and FIG. ) is a sectional view when a spring 30 is provided as an air path blocking elastic body that pushes the exhaust shutter 20 upward in the vicinity of the rotation axis 18 of the main body portion 12 of the shutter device 2 in the first embodiment. Further, FIG. 9 is a cross-sectional view of the case where rubber 31 is provided on the main body portion 12 of the shutter device 2 in the first embodiment as an air path blocking elastic body that pulls the exhaust shutter 20 upward.

By providing the spring 30 shown in FIGS. 8(a) and 8(b) or the rubber 31 shown in FIG. 9, even when there is no airflow trying to flow into the ventilation device 1 when the ventilation device 1 is stopped, , the supply air passage 14 and the exhaust air passage 15 can be maintained in a blocked state. That is, due to the elastic force of the spring 30 or the rubber 31, the air supply shutter 17 rotates in a direction approaching the external air supply port 13, and the exhaust shutter 20 rotates in a direction approaching the ventilation exhaust port 6. Each shutter stops rotating while in contact with the blocking plate 19. As a result, even if there is no airflow trying to flow into the ventilation device 1 when the ventilation device 1 is stopped, the supply air path 14 and the exhaust air path 15 are maintained in a blocked state.
Note that the elastic force of the spring 30 or the rubber 31 generates a rotational force that rotates the air supply shutter 17 and the exhaust shutter 20 in a calm state, and also generates a rotational force that rotates the air supply shutter 17 and the exhaust shutter 20 when the ventilation system 1 is in operation. The adjustment is made so that the rotational force is weaker than the rotational force generated at each shutter.
Although an example is shown in which the spring 30 or the rubber 31 is provided as the air path blocking elastic body, an elastic body other than the spring 30 or the rubber 31 may be used. Further, as long as the spring 30 or the rubber 31 described above generates a rotational force similar to that of the spring 30 or the rubber 31, other structures may be used.

Further, when the auxiliary air supply shutter 22 is provided in the air supply shutter 17 as in the second embodiment, the spring 30 or rubber 31 as the air path blocking elastic body connects the air supply shutter 17 to the external air supply port 13. It is preferable that the force of the spring serving as the window blocking elastic body to rotate the auxiliary air supply shutter 22 in the direction closer to the external air supply port 13 is stronger than the force of rotating the auxiliary air supply shutter 22 in the direction closer to the external air supply port 13. With this configuration, when there is no wind with the air supply shutter 17 and the auxiliary air supply shutter 22 open, the auxiliary air supply shutter 22 closes before the air supply shutter 17, and then the air supply shutter closes. 17 closes. As a result, after the second protrusion 27 of the auxiliary air supply shutter 22 comes to rest at a position where it does not interfere with the air supply shutter 17, the air supply shutter 17 comes down and closes, and the first protrusion 26 and the second protrusion There is a smooth transition to a state where the portion 27 contacts and restricts the rotation of the auxiliary air supply shutter 22. In addition, when the air supply fan 9 rotates and airflow flows into the air supply air path 14 while the air supply shutter 17 and the auxiliary air supply shutter 22 are closed, the air supply air flows before the auxiliary air supply shutter 22. The shutter 17 opens, and the engagement between the first protrusion 26 of the air supply shutter 17 and the second protrusion 27 of the auxiliary air supply shutter 22 is released. This allows the auxiliary air supply shutter 22 to rotate, and the rotation of the auxiliary air supply shutter 22 starts smoothly.

1 Ventilation device, 2 Shutter device, 3 Indoor air supply port, 4 Return air port, 5 Outside air port, 6 Ventilation exhaust port, 7 Ventilation air supply air path, 8 Ventilation exhaust air path, 9 Air supply fan, 10 Exhaust fan, 11 Heat exchanger, 12 Main unit, 13 External air supply port, 14 Air supply air path, 15 Exhaust air path, 16 External exhaust port, 17 Air supply shutter, 18 Rotating shaft, 19 Blocking plate, 20 Exhaust shutter, 21 Stopper, 22 Auxiliary air supply shutter, 23 Auxiliary exhaust shutter, 24 Air supply window, 25 Rotation shaft, 26 First protrusion, 27 Second protrusion, 28 Exhaust window, 29 Rotation shaft, 30 Spring, 31 Rubber

Claims (12)

It has an external air supply port connected to the outdoors, an air supply air passage through which air is supplied from the external air supply port to the air supply port of the ventilator, and an external exhaust port connected to the outdoors, which is lined with the air supply port. a main body portion having an exhaust air path that allows air exhausted from the exhaust port of the ventilation device arranged in the external exhaust port to flow to the external exhaust port;
is provided in the air supply air passage, is rotatably supported by a rotating shaft provided on the main body, and is rotated in a direction away from the external air supply opening, and opens the air supply air passage, and the external air supply an air supply shutter that blocks the air supply air path while being rotated in a direction approaching the air vent;
Provided within the exhaust air passage, rotatably supported by the rotating shaft, blocking the exhaust air passage while rotating in a direction away from the external exhaust port, and rotating in a direction approaching the external exhaust port. to open the exhaust air passage, and the air supply shutter applies a moment larger than the moment generated when the air supply shutter receives the wind pressure of the air flowing from the external air supply port toward the air supply port to the external exhaust air. an exhaust shutter that is generated in response to wind pressure of air flowing through the exhaust air path from the mouth toward the exhaust port;
an air supply air passage blocking member that is provided in the air supply air passage and blocks the air supply air passage when the air supply shutter rotates and comes into contact with the air supply air passage;
It is rotatably supported by the air supply air passage blocking member, opens the air supply air passage in a state in which it is rotated in a direction away from the external air supply port, and in a state in which it is rotated in a direction in which it approaches the external air supply port. An auxiliary air supply shutter that blocks the air passage,
A shutter device comprising: 2. The shutter device according to claim 1, wherein an area of the exhaust shutter facing the external air exhaust port is larger than an area of the air supply shutter facing the external air intake port. The distance from the tip of the exhaust shutter on the side opposite to the rotation axis to the rotation axis is longer than the distance from the tip of the air supply shutter on the opposite side to the rotation axis to the rotation axis. The shutter device according to claim 1 or claim 2. The shutter device according to any one of claims 1 to 3, wherein the external exhaust port is provided at a position farther from the rotation axis than the external air supply port. The shutter device according to any one of claims 1 to 4, wherein the external exhaust port has a larger opening area than the external air supply port. Any one of claims 1 to 5, characterized in that an exhaust air passage blocking member is provided in the exhaust air passage and blocks the exhaust air passage when the exhaust shutter rotates and comes into contact with the exhaust air passage. Shutter device as described in section. an air supply shutter stopper that restricts rotation of the air supply shutter when the air supply air path rotates in a direction approaching the external air supply port, and maintains the air supply shutter in a state where the air supply air path is blocked ; An exhaust shutter stopper is provided in the exhaust air path to restrict rotation when the exhaust shutter rotates in a direction approaching the external exhaust port, and to maintain the exhaust shutter in an open state in the exhaust air path. The shutter device according to any one of claims 1 to 6. The shutter device according to any one of claims 1 to 7, further comprising an air passage blocking elastic body that applies a force to rotate the air supply shutter in a direction toward the external air supply port. A first protrusion provided on a surface facing the air supply port at the end of the air supply shutter opposite to the rotation axis; and a first protrusion provided on a supported portion of the auxiliary air supply shutter, the auxiliary air supply The shutter contacts the first protrusion in a state in which the air supply air passage is blocked and restricts rotation of the auxiliary air supply shutter, and the shutter contacts the first protrusion in a state in which the auxiliary air supply shutter opens the air supply air passage. 9. The shutter device according to claim 1, further comprising a second protrusion that is spaced apart and allows the auxiliary air supply shutter to rotate. 10. The shutter device according to claim 9, further comprising a window blocking elastic body that applies a force to rotate the auxiliary air supply shutter in a direction toward the external air supply port. It is rotatably supported by the exhaust shutter, and blocks the exhaust air path when it rotates away from the external exhaust port, and opens the exhaust air path when it rotates toward the external exhaust port. 11. The shutter device according to claim 1, further comprising an auxiliary exhaust shutter. An air supply air passage having an external air supply port connected to the outdoors and through which air is supplied from the external air supply port to an indoor air supply port connected to the room; a casing having an exhaust air path that flows air from an indoor exhaust port taken into the casing to an external exhaust port connected to the outdoors;
an air supply fan that is provided in the air supply air path and generates an airflow from the external air supply port toward the indoor air supply port;
an exhaust fan that is provided in the exhaust air path and generates an airflow from the indoor exhaust port toward the external exhaust port;
It is provided in the air supply air passage, is rotatably supported by a rotating shaft provided on the housing, and is rotated in a direction away from the external air supply opening, and the air supply air passage is opened and the external air supply an air supply shutter that blocks the air supply air path while being rotated in a direction approaching the air vent;
Provided within the exhaust air passage, rotatably supported by the rotating shaft, blocking the exhaust air passage while rotating in a direction away from the external exhaust port, and rotating in a direction approaching the external exhaust port. opens the exhaust air passage, and the air supply shutter applies a moment larger than the moment generated when the air supply shutter receives the wind pressure of the air flowing through the air supply air passage from the external air supply port toward the indoor air supply port to the external air supply port. an exhaust shutter that is generated in response to wind pressure of air flowing through the exhaust air path from the exhaust port toward the indoor exhaust port;
an air supply air passage blocking member that is provided in the air supply air passage and blocks the air supply air passage when the air supply shutter rotates and comes into contact with the air supply air passage;
It is rotatably supported by the air supply air passage blocking member, opens the air supply air passage in a state in which it is rotated in a direction away from the external air supply port, and in a state in which it is rotated in a direction in which it approaches the external air supply port. An auxiliary air supply shutter that blocks the air passage,
A ventilation system characterized by comprising:

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