of the three periods over the course of the drying procedure depends on the laundry load specifically a laundry drier adopting the control method according to the present invention determines a proper drying time by sensing the variation of the temperature per unit time as the drying procedure progresses as well as sensing any change in the temperature variation rate per unit time the temperature variation rate per unit time measured from the initiation of the drying procedure decreases over time at a known rate and after a predetermined time passes the temperature variation rate per unit time increases when the drying object is nearly dry as indicated in fig5 at point a this increase in temperature variation rate per unit time is used to calculate the remaining drying time and in turn an overall drying time in accordance with one embodiment this temperature variation rate may be 1 u00b0 c per minute in other words when a small laundry load is being dried the drying time is reduced since the increase in the temperature variation rate per unit time occurs sooner than when a large laundry load is being dried and vice versa referring to fig6 illustrating a laundry drier control method according to the present invention with the drying object placed in the drum 30 the input unit 210 is manipulated to initiate the drying procedure in a step s 100 thus actuating the heater and motor drivers 270 and 280 in doing so the temperature sensor 240 immediately begins outputting a sensed temperature signal to the microcomputer 250 indicating the drying temperature effected within the drum.