JPH0668404B2 - Ventilation - Google Patents

Description

TECHNICAL FIELD The present invention relates to a ventilation device installed on an outer wall of a house or the like.

[Background technology]

BACKGROUND ART Conventionally, there are ventilation girdles and ventilation fans as ventilation means provided on the outer wall of a house.

However, the ventilation has a louver at the opening and cannot be forcedly exhausted, resulting in low ventilation performance. The ventilation fan can perform forced exhaust, but it does not have the function of automatically adjusting the ventilation because the opening and closing of the louver is simply interlocked with the motor of the fan or opened and closed independently. That is, it is desired to open the louver even when the fan is stopped to provide natural ventilation when the wind is weak or weak and to prevent the air from being blown into the room when the wind is strong, but there has been no ventilation means having such a function.

[Object of the Invention]

It is an object of the present invention to provide a ventilation device that can perform forced exhaust, and automatically switch between natural ventilation when there is no wind or weak wind and inflow restriction when there is strong wind.

[Disclosure of Invention]

The ventilation device of the present invention includes a ventilation path that is open to the inside and the outside of a building, an exhaust fan provided in the ventilation path, and a pair of bushes provided at the upper and lower ends of the outdoor opening of the ventilation path. An indoor side end that is rotatably supported in the vertical direction by a connecting rod having an end that can be advanced and retracted and a plurality of pins protruding from the middle part, and support shafts provided at both ends of the inner peripheral surface of the ventilation path. A plurality of movable louvers having a long hole in which the pin is engaged, and a resistance means that acts on the movable louver and holds the movable louver in an open state when the wind from outside is below a predetermined wind pressure. It is a thing.

According to the configuration of the present invention, since the exhaust fan is provided, the indoor air can be forcedly exhausted. When the exhaust fan is stopped and the wind is weak or weak, the resistance louver keeps the movable louver open, so that natural ventilation is performed. When a strong wind is generated, the movable louver rotates around the support shaft as a shaft center by the inflow wind against the resistance means to be in the closed state, and the inflow into the room is blocked. At this time, the plurality of movable louvers are interlocked by a connecting rod having a pin engaged with the elongated hole. In this way, natural ventilation when there is no wind or weak wind and inflow restriction when there is strong wind are automatically switched. In addition, since the upper and lower ends of the connecting rod, which has a plurality of pins protruding in the middle so that the movable louvers can be interlocked, are inserted into the bush and supported by the ventilation passage, the movable louver is connected via the connecting rod. Supported by ventilation channels. Therefore, if the structure in which the movable louver is rotatably supported by the support shaft in the ventilation path is combined with the above-mentioned structure, the movable louver is supported by two points of the support shaft and the pin, and the support strength is increased. Is mounted in a high and stable condition. Further, since the pin is engaged with the long hole of the movable louver, the movable louver can change the distance between the support shaft and the pin as the movable louver rotates about the support shaft. Therefore, the movable louver and the connecting rod are not subjected to an unreasonable load, and the operation is good.

Embodiment A first embodiment of the present invention will be described with reference to FIG.
This ventilation device is supported by a ventilation passage 3 opened to the inside 1 and the outside 2 of a building, an exhaust fan 4 provided in this ventilation passage 3, and an outdoor opening of the ventilation passage 3 so as to be openable and closable. Outdoors 2
A movable louver 5 that is closed by the inflow air from and a resistance means 6 that holds the movable louver 5 in an open state until the closing force by the inflow air reaches a predetermined strength.

The ventilation path 3 is provided on the outer wall 7 and has an outer peripheral frame 8. A large number of fixed louvers 9 are fixed to the indoor opening 3b of the ventilation path 3 side by side vertically. The exhaust fan 4 includes a fan motor 4a fixed to the outer peripheral frame 8 with a stay 10 and an impeller 4b.

A plurality of movable louvers 5 are arranged vertically, and each of them is a support shaft.
It is supported by the outer peripheral frame 8 by 5a so as to be vertically rotatable. Each movable louver 5 has a long hole 13 into which a pin 12 provided on a connecting rod 11 is engaged, and the connecting rod 11 is supported at its upper and lower ends by bushes 14 on a peripheral frame 8 so as to be vertically movable. The resistance means 6 is composed of a coil spring that biases the movable louver 5 at the upper end in the opening direction, and in a windless state, each movable louver 5 is held at a maximum opening angle (angle indicated by a solid line in FIG. 1) that is directed obliquely downward. It

The operation will be described. FIG. 1 shows a state in which the exhaust fan 5 is being driven, and wind flows as indicated by an arrow indicated by a solid line. When the exhaust fan 4 is stopped in this state, the wind of the outdoors 2 enters from the gap of the movable louver 5 (shown by a chain line), and the exhaust fan 4 slowly rotates. As a result, it is possible to obtain the feeling that the outside air is contained and the sensitivity value. When the wind from the outdoors increases, the movable louver 5 is pushed down by the wind pressure against the resistance means 6 made of a spring member, and the gap between the movable louvers 5 becomes smaller. Therefore, the amount of inflow air into the room is limited. When the wind further intensifies, the movable louver 5 is closed, and the inflow of wind is stopped. When the wind stops, the movable louver 5 is opened by the restoring force of the resistance means 6.

FIG. 2 shows a second embodiment. In this example, each movable louver 5'has a downward convex airfoil cross section, that is, a cross sectional shape in which a downward force is generated. The downward force is generated because the movable louver 5 ′ has a downwardly convex airfoil cross section, so that the flow on the lower surface of the movable louver 5 ′ is accelerated and a pressure drop occurs due to Bernoulli's theorem. The movable louver 5'has the resistance means 6 set so that the maximum opening angle becomes horizontal. Further, a louver closing prevention device 15 for stopping the movement of the connecting rod 11 in association with the operation of the exhaust fan 4 is provided. The louver closing prevention device 15 is composed of an electromagnetic solenoid that causes the stopper pin 16 to project when the switch 17 of the fan motor 4a is turned on. 18 is a power supply.

In the case of this configuration, since the movable louver 5'has a blade-shaped cross section, when the wind from the outdoors passes through the movable louver 5'when the exhaust fan 4 is stopped, the downward force is generated as described above, and The air volume is surely restricted and the movable louver 5 is closed. During operation of the exhaust fan 4, the stopper pin 16 projects to prevent the connecting rod 11 from rising, so that the movable louver 5 does not close. Other structural effects are similar to those of the first embodiment.

Although a spring member is used as the resistance means 6 in the above embodiment, a weight may be used. Further, although the ventilation passage 3 is provided on the outer wall 7 in each of the above-mentioned embodiments, it may be provided on a foundation or a small roof for ventilation.

〔The invention's effect〕

Since the ventilation device of the present invention is provided with the exhaust fan, the indoor air can be forcedly exhausted. When the exhaust fan is stopped,
When there is no wind or a weak wind, the movable louver is held in an open state by the resistance means, so that natural ventilation is performed. When a strong wind is generated, the movable louver rotates around the support shaft as a shaft center by the inflow wind against the resistance means to be in the closed state, and the inflow into the room is blocked. At this time, the plurality of movable louvers are interlocked by a connecting rod having a pin engaged with the elongated hole. In this way, natural ventilation when there is no wind or weak wind and inflow restriction when there is strong wind are automatically switched. In addition, since the upper and lower ends of the connecting rod, which has a plurality of pins protruding in the middle so that the movable louvers can be interlocked, are inserted into the bush and supported by the ventilation passage, the movable louver is connected via the connecting rod. Supported by ventilation channels. Therefore, if the structure in which the movable louver is rotatably supported by the support shaft in the ventilation path is combined with the above-mentioned structure, the movable louver is supported by two points of the support shaft and the pin, and the support strength is increased. Is mounted in a high and stable condition. Further, since the pin is engaged with the long hole of the movable louver, the movable louver can change the distance between the support shaft and the pin as the movable louver rotates about the support shaft. Therefore, the movable louver and the connecting rod are not subjected to an unreasonable load, and the operation is good.

[Brief description of drawings]

FIG. 1 is a sectional view of the first embodiment of the present invention, and FIG. 2 is a sectional view of the second embodiment. 3 ... Ventilation path, 4 ... Exhaust fan, 5 ... Movable louver,
6 ... Resistance means, 7 ... Outer wall

Claims (1)

[Claims] 1. A ventilation passage open to the inside and outside of a building,
An exhaust fan provided in the ventilation passage and a connecting rod in which the upper and lower ends are movably inserted into a pair of bushes provided at the upper and lower ends of the outdoor opening of the ventilation passage and a plurality of pins are projectingly provided in an intermediate portion. A plurality of movable louvers having a long hole in which the pin is engaged at an indoor side end, which is rotatably supported in the vertical direction by spindles provided on both sides of the inner peripheral surface of the ventilation passage, A ventilator comprising: a resistance unit that acts on the louver and holds the movable louver in an open state when the wind from the outdoors is below a predetermined wind pressure.