Importance

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Abstract

A driving device which is automatically activated by detecting solar light and an automatic ventilation system utilizing the aforementioned driving device. An electric motor (21) is connected to relay switch (22), which is connected to limit switch (23) and light sensor switch (24). The limit switch (23) is connected between the relay switch (22) and the power supply and a manual main switch (25) between the light sensor switch (24) and the power supply. Normally when the main switch (25) is 'on' and solar light exceeds the threshold, the light sensor detects it and the contact of the switch (24) changes to be activated. Electricity is then supplied to the relay switch (22) and the contact of the relay switch (22) also change to be activated. The electric motor is interlinked with a vent cover via the power transmission and the vent cover gradually begins to open. A specific time after the electric motor (21) is activated and the limit switch (23) comes in contact with the power transmission, then the limit switch's (23) contact changes to turn itself off. Thus the electric motor stops and the vent cover interlocked with the electric motor can stay open without operations of the manual switch. The main switch (25) normally stays in the 'on' state, however, it can serve as a safety switch to forcibly shut down the system in the event of long-term shut down and maintenance.

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First Claim