JP2001050565A - Ventilation system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a ventilation system capable of maintaining ventilation in places apt to get high humidity such as under floors or in ceilings even when cloudy weather or rainy weather continues and electric power supply is short. SOLUTION: The ventilation system is provided with ventilation fans 2 able to run with power supply from a solar cell 1. A plurality of the ventilation fans 2 are disposed and driven successively according to an amount of power supply from the solar cell 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a ventilation system, and more particularly, to a ventilation system using a solar cell as a main power source.

[0002]

2. Description of the Related Art A plurality of ventilation openings are provided under the floor of a house, behind a ceiling, and the like, in order to prevent dew condensation and prevent humidity from increasing. In Japan, where humidity is high, it is desirable to forcibly ventilate by installing a ventilation fan rather than ventilating only by natural ventilation. A commercial power supply wired to a house is usually used as a drive source for these ventilation fans. However, since the ventilation fans are continuously driven, the power cost required for driving is not small.

[0003] Therefore, a ventilator that can reduce the power cost by using a solar cell has been developed (see, for example, Japanese Patent Application Laid-Open No. Hei 4 (1994)).
-13031). This ventilator is provided with a power storage device, stores power in advance by using the power storage device during daytime sunshine, and drives a plurality of ventilation fans by power supply from the power storage device during nighttime operation.

[0004]

However, when cloudy or rainy weather continues in the daytime, power supply is insufficient even with a power storage device, and a plurality of ventilation fans cannot be driven. However, there is a problem that the humidity is kept high.

[0005] In view of the above-mentioned problems of the prior art, it is an object of the present invention to increase the humidity under the floor, the ceiling, etc. even when cloudy or rainy weather continues and the power supply is small. An object of the present invention is to provide a ventilation system capable of maintaining ventilation in an easy place.

[0006]

The above object is achieved by the invention described in each claim. That is, the characteristic configuration of the ventilation system according to the present invention has a ventilation fan that can be driven by power supplied from a solar cell, and a plurality of the ventilation fans are arranged, and the plurality of ventilation fans are provided from the solar cell. It is to be driven sequentially according to the amount of supplied power.

[0007] According to this configuration, in the case of cloudy or rainy weather in the daytime, or when such a state continues for a long time, the power consumption can be reduced by the number of the ventilation fans that are stopped out of the plurality of ventilation fans, and operation is possible. The ventilation is maintained by a simple ventilation fan, so even in the case of such a low power supply, it is ensured that all the ventilation fans stop and the situation where the ventilation function is not exhibited at all like the conventional technology continues for a long time can do. Moreover, having such a function, the amount of solar cells to be disposed can be relatively reduced as compared with conventional ventilators using solar cells, and the installation cost of the present ventilation system can be reduced. Can be. Therefore, according to the present invention, there is provided a ventilation system capable of maintaining ventilation in a place where humidity is likely to be high, such as under the floor, above the ceiling, etc., even when cloudy or rainy weather continues and power supply is low. Was able to.

It is preferable that the plurality of ventilation fans are sequentially driven in accordance with a preset priority.

[0009] According to this configuration, the priority of ventilation is given to the lower floor, for example, where the humidity tends to be the highest, and the ventilation function of this place is maintained by maintaining the ventilation function of this place. It is convenient to make it preferable.

[0010] Preferably, the means for prioritizing the driving of the plurality of ventilation fans is performed by resistance means interposed between the solar cell and the ventilation fan.

According to this configuration, since the ordering can be performed by providing the potential difference, it is easy and reliable, and the ordering according to the power capability of the solar cell can be easily set, which is convenient.

It is preferable that the resistance means is provided by increasing or decreasing the number of arranged diodes.

According to this configuration, the potential difference can be easily increased by increasing the number of diodes to be arranged, and the heat loss is small, so that there is no waste and the cost can be reduced, which is convenient.

Further, it is preferable to provide a power storage means.
According to this configuration, it is possible to forcibly and continuously implement ventilation when it is desired to always continue ventilation regardless of day and night, for example, when operating a ventilation fan of a toilet. In this case, the voltage of the solar cell, which is the main power supply, may be lowered, and power may be supplied from both the power supply and the power storage means, and the operation order may be set by resistance means or the like. Then, a secondary battery, a capacitor, or the like can be used for the power storage means, and it is preferable to connect an overcharge / overdischarge prevention circuit.

[0015]

Embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 shows a house H in which the ventilation system of the present embodiment is arranged. This ventilation system uses a solar cell 1 disposed on a roof or the like as a power supply source, and includes a plurality of ventilation fans 2 installed inside a ventilation opening in the attic and below the floor. FIG. 2 shows a schematic circuit configuration from the solar cell 1 to the ventilation fan 2.

Electric power is supplied from the solar cell 1 to a motor M for driving a ventilation fan 2 installed in the attic and under the floor. In this case, consideration is given so that different loads are applied from the solar cell 1 according to the ventilation priority of each ventilation fan 2. That is, the plurality of ventilation fans 2 are connected in parallel from the solar cell 1, and the ventilation fan located on the north side under the floor where moisture easily accumulates is arranged so as to be directly connected to the solar cell 1, and then another ventilation fan under the floor is arranged. A ventilation fan is set as a second priority, and a ventilation fan above the ceiling is set as a third priority. A diode 3 is arranged between the solar cell 1 and the electric motor M that drives the ventilation fan 2 according to the respective priorities. Is caused. The diode is, for example, 0.25
Various types are commercially available in the range of about 0.7 V, and by using these combinations, the potential difference from the solar cell 1 (for example, a power generation amount of 12 V) can be easily set.

In this way, when the solar cell 1 can generate enough power as in the case of fine weather, the all-ventilation fan 2 operates, and in the case of cloudy or rainy weather,
When the amount of light received by the solar cell 1 is limited, the ventilation fan with a higher priority operates but the ventilation fan with a lower priority stops. Furthermore, if the cloudy weather or rainy weather continues for a long time, the ventilation fans with lower priority are stopped sequentially, but even in that case, the operation of the ventilation fan with the highest priority is maintained, so that the situation where the ventilation function is stopped for a long time is avoided. Will be done.

If no light is received at night, for example, a storage battery (not shown) such as a secondary battery or a capacitor connected to a solar cell is used, or a commercial AC power supply is used as an auxiliary power supply. Good. Even in this case,
Since the operation of the ventilation system is not all dependent on the AC power as in the prior art, considerable power saving is achieved.

[Other Embodiments] (1) In the ventilation system, a power storage means such as a secondary battery or a capacitor may be connected between the solar cell and the ventilation fan. In this way, ventilation can be more forcibly and continuously performed, which is convenient. In this case, it is convenient to attach an automatic changeover switch that switches to the power storage means according to the amount of power generated by the solar cell and a control device that operates the switch. Alternatively, a timer mechanism that operates for a predetermined time may be connected. The provision of the timer mechanism is convenient when, for example, it is desired to stop the operation of the motor at night in order to prevent the generation of noise in a densely populated house or the like.

When the power storage means is connected, it is preferable to connect an overcharge / overdischarge prevention circuit.

(2) A plurality of ventilation fans may be arranged for each priority, or a single ventilation fan may be arranged for all the priorities. The priority order for operating the ventilation line can be arbitrarily set according to the purpose.

(3) In the above embodiment, an example is described in which the ventilation fan is provided under the floor and above the ceiling. However, the ventilation fan may be further connected to a ventilation fan for ventilating a bathroom, a toilet, and the like to form a ventilation system. The present invention is not limited to ordinary households, and may be applied to apartment houses, warehouses, office buildings, and the like.

(4) In the above embodiment, a diode is taken as an example of the resistance means, but a resistor may be used instead.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example in which a ventilation system of the present invention is arranged in a house.

FIG. 2 is a schematic circuit diagram of the ventilation system of the present invention.

[Explanation of symbols]

 1 solar cell 2 ventilation fan 3 diode

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (Reference) G05F 1/67 G05F 1/67 A

Claims (5)

[Claims] 1. A ventilation system having a ventilation fan that can be driven by power supplied from a solar cell, wherein a plurality of said ventilation fans are arranged, and said plurality of ventilation fans are arranged in accordance with an amount of power supplied from said solar cell. Ventilation system designed to be driven sequentially. 2. The ventilation system according to claim 1, wherein the plurality of ventilation fans are sequentially driven in accordance with a preset priority. 3. The ventilation system according to claim 1, wherein the means for prioritizing the driving of the plurality of ventilation fans is performed by a resistance means interposed between the solar cell and the ventilation fan. 4. The ventilation system according to claim 3, wherein said resistance means is provided by increasing or decreasing the number of arranged diodes. 5. The ventilation system according to claim 1, further comprising a power storage unit.