JPS61285331A - Ventilating device employing solar cell - Google Patents

Abstract

PURPOSE:To enable to perform usual ventilation during some period even after lowering of the intensity of illumination of the collecting window of a solar cell, by a method wherein the output voltage of a storage battery charged with an electromotive force produced by the solar cell is fed to a fan motor through a voltage-detecting control means. CONSTITUTION:Since the electromotive force of a solar cell 1 under sunshine is equivalent to or higher than the voltage of a storage battery 3, the storage battery 3 is charged in a condition that a non-return means 2 is rendered inoperative. Meanwhile, the electromotive force of the solar cell 1 is lowered under cloudy weather or sunset, and the non-return means 2 is worked to disconnect the circuits of the storage battery 3 and the solar cell 1. When the output voltage level of the storage battery 3 exceeds the upper limit of a previously set value through the action of a voltage-detecting control means 4, a fan motor 5 is run, and when it is reduced to lower than the lower limit of the set value resulting from a following discharge, the fan motor is stopped. This enables continuance of ventilation during a specified time even after the intensity of illumination of the collecting window of the solar cell 1 is lowered.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a ventilation device operated by solar cells.

[Background technology]

A block diagram of the circuit configuration of a conventional ventilation system using solar cells is shown in FIG. In this conventional configuration, solar cells (1
) directly rotates the fan motor (5) of the ventilation fan, so when the illuminance of the light receiving window of the solar cell 11) drops below a certain threshold, the fan motor (5) of the ventilation fan is immediately turned off. (6) will stop. Therefore,
For example, it is not suitable for use in places where the air is severely contaminated and requires constant ventilation. Also, even if you try to use it in a normal living room, it is foolish to use it only during the day on good weather days, or on days when the sun is frequently blocked by clouds, you will not be able to start the Seven Tahuan (6). There has been a problem in that the noise generated by the stoppage gives people a feeling of discomfort.

[Purpose of the invention]

The present invention has been made in view of the above problems, and
It is an object of the present invention to provide a ventilation device using solar cells that can perform normal ventilation for a certain period of time even after the illuminance at the light receiving window of the solar cells has decreased.

[Disclosure of the invention]

Embodiment A block diagram showing the circuit configuration of an embodiment of the present invention is shown in FIG. The electromotive force generated by the solar cell il+ passes through the backflow prevention means +21 and charges the storage battery +31. This storage battery (3
) is supplied to the fan motor (5)K through the voltage detection control means (4). FIG. 2 is an explanatory diagram of the operation of the voltage detection control means (4). Based on FIG. 1 and FIG. 2, the operation of the ventilation system using the solar cell (1) according to the configuration of this embodiment will be explained below.

First, the electromotive force of the solar cell a made of amorphous silicon (if the illuminance of the light receiving part 11 is sufficiently high, the solar cell fl) is equal to the voltage of the storage battery (3), such as a sealed nickel-cadmium storage battery, or 1 because it is expensive
The backflow prevention means (2) consisting of a diode etc. does not operate, and the storage battery (3) can be charged by the solar cell +11. On the other hand, on cloudy days or at sunset, the solar battery +11
When the electromotive force of the storage battery (3) decreases and becomes lower than the terminal voltage of the storage battery (3) at that time, the backflow prevention means (2) operates and the storage battery (3) is activated.
3) and the circuit of the solar cell (1) are electrically disconnected.

Depending on the voltage level of the output voltage of the storage battery (3), the voltage detection control means (4) selects and performs the 92 operations shown in FIG. In other words, as shown in the figure, if the output voltage of the storage battery (3) is higher than the upper limit voltage set in advance to prevent overcharging, the output voltage of the storage battery (3) is set to 7 - Tahuan (5). The circuit supplying the air is turned on and ventilation takes place.

On the other hand, the operation of the voltage detection control means (4) when the output voltage of the storage battery (3) gradually decreases due to discharge is shown in FIG. 2(B). If the discharge of the storage battery (3) progresses in order to rotate the fan motor (5) of the ventilation fan, and the output voltage becomes lower than the lower limit voltage set to prevent over-discharge of the storage battery (3), the storage battery (3) The switch of the circuit that supplies the output voltage to the fan motor (6) is turned off and ventilation is stopped.

As is clear from the above operation explanation, if the circuit configuration of this embodiment is used, even after the illuminance of the light receiving window of the solar cell (1) decreases, the fan motor will remain active for a certain period determined by the capacity of the storage battery (3). (6) continues to rotate to provide ventilation. Therefore, if the capacity of the storage battery (3) is set to an appropriate value depending on the purpose of use of the ventilation fan, ventilation will be performed constantly during the day on good days, and even after the sun goes down, ventilation will be possible during a certain period of time. It is possible to create a ventilation device using batteries.

FIG. 3 shows a sectional view of a storage cabinet (9) equipped with a ventilation system having the circuit configuration described above.

In Figure 3, (6) is the wall of the building, (7) is the entrance to the three-way entrance, (8) is the input lid installed indoors, (9) is the storage area installed outdoors, ( 10) is j three containers, (!
1) is a tact, and a solar cell it) and a fan motor (5) are provided at the positions shown in the figure. In the storage room (9) shown in the above embodiment, the interior of the storage room (9) for fresh food continues to be constantly ventilated during the day on good weather days and for a certain period after sunset. No matter when the loading lid (8) is opened, no bad odor will leak into the room, and a pleasant living environment can always be maintained. Since the above-mentioned bad odor is particularly noticeable during the daytime on a good day, the effect of using this ventilation device is great. Furthermore, in this embodiment, since the space that requires ventilation is smaller than the room, a fan motor (5) with a small ventilation capacity can be used. When using such a fan (5), a fan with a low operating voltage can be selected, and therefore, the number of solar cells (1) to be used can be reduced.

In addition, the operating voltage is sufficiently lower than that of commercial power sources, so
Circuit components with low withstand voltage can be used. For the above reasons, there is an effect that the ventilation device can be made smaller and the manufacturing cost can be reduced.

In addition, in this example, the inside of the storage cabinet (9) was considered as a space that requires ventilation, but this is also considered to be a room in a house that has cigarette smoke, smells, etc. and requires ventilation from time to time. You can. If the ventilation fan can be used intermittently, for example, even if the fan motor (5) consumes as much power as that used for ventilation in a living room, the solar battery (1)
There is no need to increase the number of In other words, it is permissible for the fan motor (6) to be stopped during the day on a good day, so the current generated under the rated conditions of the solar cell (1) is the same as that of the fan motor (5). This is because the current may be smaller than the rated current.

〔Effect of the invention〕

In the present invention, the configuration of a ventilation system using solar cells includes a solar cell, a storage battery that is charged by the electromotive force of the solar cell, and a voltage detection control means that detects the voltage of the storage battery and controls the supply of output. The ventilator is operated by the output voltage of the storage battery, so the ventilation system can be operated continuously from daytime on a good day to after sunset until a certain period of time determined by the capacity of the storage battery. occurs. Therefore, for example, the temperature rises considerably during the day on a good day, so the progress of decomposition is significant during such hot days!
If the above-mentioned ventilation fan is installed and used in the storage, the above-mentioned effects can be fully exhibited and used effectively. Furthermore, if the ventilation may be carried out in intermittent operation, the advantage is that the number of solar cells can be reduced and the cost of the ventilation system can be reduced.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing the circuit configuration of an embodiment of the present invention, Fig. 2 is an explanatory diagram of the operation of the voltage detection control means, which is one of the components described above, and Fig. 3 shows a ventilation system having the above circuit configuration. Figure 4 is a block diagram of the conventional example, (1) is a solar cell, (3) is a storage battery, (4)
) is a voltage detection control means, and (5) is a fan Tanabata. Agent Patent Attorney Ishi 1) Chief Figure 1 I! Figure 2 (A) (B) *Figure 3 Figure 4

Claims (1)

[Claims] (1) A solar cell, a storage battery that is charged by the electromotive force of the solar cell, a voltage detection control means that detects the voltage of the storage battery and controls the supply of output, and a fan motor that operates based on the output voltage of the storage battery. A ventilation device using solar cells, characterized by comprising: