Patent ID: 6326882
Filing Date: 2001-12-04
Classification: F24F,G05B

Abstract:
A control apparatus for controlling a ventilation device, the control apparatus being coupled between a power source having a power switch and the ventilation device, comprising:an activating circuit, coupled to the power source, for generating a first activating signal when the power switch is turned on;an electronic switch circuit, coupled to the activating signal, for activating the ventilation device;a first timer, coupled to the activating circuit, for generating a second activating signal when the power switch is turned off, the second activating signal being coupled to the electronic switch circuit to activate the ventilation device for a first predetermined time period; anda second timer, coupled to the activating circuit, for periodically generating a third activating signal having a second predetermined time period when the power switch is turned off, the third activating signal being coupled to the electronic switch circuit to periodically activate and deactivate the ventilation device.