Air Conditioner

Abstract

In a drain water discharging method for force-feeding drain water via a drain pump, clogging of a drain piping is prevented by controlling the drain pump. An air conditioner has a drain pan for collecting drain water that is dropped from a heat exchanger, a drain pump for discharging the drain water in the drain pan, and a DC motor for driving the drain pump. The DC motor for driving the drain pump is controlled to increase its rotating speed when a rotary torque of the DC motor is increased.

1 . An air conditioner comprising a drain pan for collecting drain water that is dropped from a heat exchanger, a drain pump for discharging the drain water in the drain pan, and a DC motor for driving the drain pump, the air conditioner being characterized in that the DC motor for driving the drain pump is controlled to increase its rotating speed when a rotary torque of the DC motor is increased. 
     
     
         2 . The air conditioner according to  claim 1 , being characterized in that in addition to said control, start-stop control of the drain pump is executed according to a water level of the drain water in a drain water storing portion that is pumped up by the drain pump. 
     
     
         3 . An air conditioner comprising a drain pan for collecting drain water that is dropped from a heat exchanger and a drain pump for discharging the drain water in the drain pan, the air conditioner being characterized in that the drain pump is driven after a predetermined time has elapsed from the start of operation of the air conditioner. 
     
     
         4 . An air conditioner comprising a drain pan for collecting drain water that is dropped from a heat exchanger and a drain pump for discharging the drain water in the drain pan, the air conditioner being characterized in that the drain pump is driven at a predetermined cycle by a timer during operation of the air conditioner.