Patent ID: 6803672
Filing Date: 2004-10-12
Classification: B60H

Abstract:
A device for avoiding overheating in a passenger compartment of a parked vehicle, said device comprising a temperature sensor, a temperature comparator and a control element in electrical communication with the comparator for controlling the actuation and operation of an existing air conditioner fan of the vehicle;the control element comprising a power supply management element adapted to draw energy in pulses from a battery unit of the vehicle to energize the fan when the temperature in the passenger compartment exceeds a pre-determined level, and to cease drawing energy from the battery unit when the temperature falls below the predetermined level; wherein said power supply management element is a pulse width modulator having a pulse frequency set above the audible frequency range and below the RE frequency range so as to avoid human discomfort and to avoid possible frequency-related interference with electronic components of the vehicle.