Ventilation – Having outlet airway – With air pump
Patent
1995-10-05
1997-08-05
Joyce, Harold
Ventilation
Having outlet airway
With air pump
454239, 454347, 454351, F24F 1100
Patent
active
056536321
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
This invention is a driving device that responds to solar light, specifically a driving device for automatic ventilation, automatic shading or automatic light intake.
BACKGROUND ART
As a conventional ventilation system, the vent (2) of FIG. 1 is well known. This vent (2) is aimed to ventilate the attic, under the floor, or a basement of house 1. It is a fixed type vent with a louver cover as illustrated in FIG. 1(A). Under another conventional system, a vent (no illustration) which can be opened and shut manually or by an electric motor is well known. This is mainly used to ventilate a factory or a warehouse.
The conventional fixed-type vent does not have enough opening space due to aesthetics and space constraints of layouts. In addition, since it is continuously open, it cannot ventilate sufficiently and it takes in moisture during the night. This results in mold as well as poor insulation in summer and winter.
Another conventional open/shut vent has better ventilation than that of the fixed type. However, being manually operated, it is difficult to generate the optimum environment in response to climatic changes which occur indoors and outdoors. Moreover, if closing is neglected, it is inevitable that inventory in the warehouse would be seriously damaged.
DISCLOSURE OF THE INVENTION
Therefore, one purpose of this invention is to provide a simple, economical and safe driving device which can be automatically operated by detecting solar light.
The second purpose is to provide an automatic ventilation system utilizing the aforementioned driving device.
The third purpose is to provide an automatic ventilation system constructed with a combination of the aforementioned driving device and a ventilation fan.
And the other purpose is to provide an automatic ventilation system which consists of more than one aforementioned driving device to be operated simultaneously.
To achieve the above mentioned purposes, the light responsive driving device which resulted from this invention consists of an electric motor, a power supply, a relay switch connected to the electric motor, a limit switch connected between the aforementioned relay switch and the aforementioned power supply and a light sensor switch which is connected between the aforementioned relay switch and the previously mentioned power supply and detects the intensity of solar light. The characteristic of the device is that when the intensity of solar light exceeds the threshold, the above mentioned light sensor switch turns on, which automatically turns off the above mentioned relay switch. Then the above mentioned electric motor is activated. After a specific time the aforementioned limit switch turns off to automatically keep the electric motor off. It is feasible to install a manual main switch between the light sensor switch and the electric power supply. This is highly safe and efficient because when the main switch is turned off, the electric driving device is forcibly shut off regardless of the intensity of solar light. The light sensor switch can be set to a desirable threshold depending on seasons and sunshine conditions. Normally the light sensor switches, the limit switches and the relay switches are 1-circuit 2-contact type. However, the relay switches can be 2-circuit 2-contact type. In this case the electric motor's rotational direction reverses before/after turning on. A ventilation fan can be connected parallel to the electric motor or more than one unit consisting of an electric motor, a relay switch and a limit switch can be connected in parallel to one another. Furthermore if the light sensor switches are connected in parallel to one another, an 0R circuit can be formed.
The power transmission generated by this invention is to convert rotational movement of the electric motor to reciprocal linear movement. It is made up of a rotation part fixed to the axis of the electric motor, a link connected to the other end of the rotation part in a way to allow rotation, a connecting part which has a horizontal groove in the vic
REFERENCES:
patent: 1792514 (1931-02-01), Spear
patent: 4375183 (1983-03-01), Lynch
patent: 4898086 (1990-02-01), Norris
Gohara Tomohiro
Ogawa Taro
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