JPS621629Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an attic ventilation system equipped with a ventilation fan powered by a solar cell.

Condensation, in which water vapor becomes fine droplets and forms dew on the walls of houses, should be avoided as much as possible because it damages the structure and causes dirt. It is effective to ventilate the air outdoors. However, the attic, which is formed between the roof and ceiling of a house, has a structure that prevents condensation through a small amount of natural ventilation, which is traditionally done through small windows. In such cold regions as the sunrise, condensation would form as soon as the temperature inside the attic became even slightly higher than the outside temperature. An effective way to prevent this condensation in the attic is to forcibly ventilate the air inside the attic using a ventilation fan, but it is not widely used as there is resistance to implementing it due to high electricity bills. is the current situation.

The present invention was developed in view of the above circumstances, and is a shed that economically prevents dew condensation in the attic by using a solar battery to drive a ventilation fan to forcefully ventilate the attic. Intended to provide back ventilation.

Hereinafter, one embodiment of the present invention will be explained with reference to the drawings. FIG. 1 is a schematic perspective view of an example of a house to which the attic ventilation system of the present invention is applied, and FIG. 2 is a partially cutaway side view of one embodiment of the ventilation system.

In FIG. 1, 1 is a house with a gable roof.
The space between the underside of the roof 2 and the ceiling 3 is the attic 4, and a ventilation window 6 is formed in a wall 5 of the attic 4, opening in the direction in which air is exhausted by a ventilation fan 9, which will be described later.
Louvers 7 are fitted into the ventilation window 6 to prevent the intrusion of rainwater and snow, and a DC electric ventilation fan 9 is attached to the inside of the louvers via an L-shaped frame 8. The ventilation fan 9 is supported by the frame 8 so that its axial direction is inclined downward from the indoor side to the outdoor side.

Further, the plurality of louvers 7 attached to the ventilation window 6 are arranged parallel to each other with their width directions inclined toward the axial direction of the ventilation fan 9.

10 is a solar cell installed on the roof 2 on the south side,
It receives sunlight and generates electricity. This solar cell 10 is connected to the ventilation fan 9 as a power source, and therefore the ventilation fan 9 is rotationally driven by the power of the solar cell 10 during the day. In the case of this embodiment, the ventilation fan 9 and the solar cell 10 constitute the ventilation system 11 in the attic 4. For example, when using a 12V30W ventilation fan 9 that can obtain an air volume of 9 to 12 m ³ /min, the solar cell 10 For example, it is sufficient to prepare one with an output of about 12V3A in which several modules are arranged within a frame of about 60cm wide by 90cm tall.

Here, in the ventilation device 11, if it is a sunny day, the ventilation fan 9 is automatically driven by the electromotive force of the solar cell 10, and the air inside the attic 4 is ventilated with the outside air. Therefore, even if the inside of the attic 4 is warmed up at sunrise, the air inside the attic 4 will not become hotter than the outside air and the moisture in the humid air will not condense. Therefore, the dew condensation phenomenon that was conventionally noticeable when the temperature rose during the day can be economically prevented by using sunlight and without using commercial power at all.

In addition, since ventilation is not performed when the solar cell 10 is not in operation due to rainy or cloudy weather, there is no inconvenience of inhaling humid air from outside into the attic 4.

In the above embodiment, the ventilation fan 9 is driven only when the solar cell 10 is in operation. However, as in the ventilation device 21 shown in FIG.
By using the ventilation fan 9, the ventilation fan 9 can be driven whenever necessary.

That is, the ventilation system 21 stores surplus power in the battery 22 when the solar cell 10 is in operation, and closes the manual switch 23 to connect the battery 22 to the ventilation fan 9 during cloudy or rainy weather when the solar cell 10 does not operate. By doing so, the ventilation fan 9 can be driven.

Furthermore, in each of the above-described embodiments, the solar cell 10 is not limited to the roof 2, but may be provided anywhere in the house 1 as long as it is exposed to sunlight; for example, it may be provided on a wall facing south.

As explained above, according to the attic ventilation system of the present invention, the attic ventilation fan is driven by solar cells, so as long as the sun is shining, solar energy can be used without using commercial electricity at all. The ventilation fan is automatically operated, and even when the inside of the attic is warmed by solar heat at sunrise, especially in cold regions during the winter when condensation is likely to occur, ventilation is performed in conjunction with this, so that ventilation is performed in conjunction with this. It can effectively suppress the occurrence of condensation due to outdoor temperature differences, and since the solar cells do not generate electricity on cloudy or rainy days, there is no need for unnecessary ventilation, which eliminates the need for excessive humidity in the attic. Furthermore, if there is no need for ventilation even when the weather is not sunny, the surplus electricity generated from the solar cells during sunny weather can be stored in a battery, and when necessary, the battery can be connected to the ventilation fan by operating a switch. It has features such as being able to drive ventilation fans at any time by effectively utilizing surplus electricity. In addition, since the axial direction of the ventilation fan is inclined downward from the indoor side to the outdoor side, the air trapped in the upper part of the attic can be effectively exhausted.
In addition, since the width of the louver is tilted in the same direction as the axial direction of the ventilation fan, air resistance during exhaust can be sufficiently reduced, ensuring sufficient ventilation even with a small motor with low power consumption. In addition, even if rainwater enters the house through the louver during a typhoon, it will not hit the ventilation fan motor.

[Brief explanation of the drawing]

Fig. 1 is a schematic perspective view of an example of a house to which the attic ventilation system of the present invention is applied, Fig. 2 is a partially cutaway side view of an embodiment of the above-mentioned ventilation system, and Fig. 3 is a schematic perspective view of an example of a house to which the attic ventilation system of the present invention is applied. FIG. 4 is a side view of a main part of a modified example of the ventilation device. 1... House, 2... Roof, 3... Ceiling, 4...
Attic, 5... Wall, 9... Electric ventilation fan, 10...
...Solar battery, 11,21...Ventilation system in the attic.

Claims (1)

[Scope of utility model registration request] An electric ventilation fan is installed inside the wall between the roof and ceiling of a house to ventilate the air in the attic, and the ventilation fan is supported so that its axial direction slopes downward from the indoor side to the outdoor side. a ventilation window that opens in the direction of air discharge by the ventilation fan, and a solar cell installed in the house and connected to the ventilation fan as a power source, and the ventilation window includes:
A ventilation system for an attic, characterized in that a louver is installed with its width direction inclined in the axial direction of a ventilation fan.