Air conditioner

Abstract

An air conditioner of variable capacity type comprises a variable-capacity compressor capable of varying capacity in two levels by switching between FULL and SAVE. The variable-capacity compressor can start operation at SAVE so as to allow the air conditioner to start operation without causing a shutdown of the variable-capacity compressor in an overloaded condition or in a low power-supply voltage environment.

1 . An air conditioner of variable capacity type which comprises a compressor capable of varying capacity in two levels by switching between full-power operation and power-saving operation and which is provided with a voltage detector, wherein 
 when a supply voltage is below a predetermined value, the compressor is operated at the power-saving operation.    
     
     
         2 . The air conditioner of  claim 1 , wherein 
 the compressor is driven by a capacitor start and run single-phase induction motor, and    when the compressor is operated at the power-saving operation, a plurality of running capacitors are connected to each other to increase a capacitor capacity.    
     
     
         3 . An air conditioner of variable capacity type which comprises a compressor capable of varying capacity in two levels by switching between full-power operation and power-saving operation and which is provided with a current detector, wherein 
 when an operating current exceeds a predetermined value, the compressor is operated at the power-saving operation.    
     
     
         4 . The air conditioner of  claim 3 , wherein 
 the compressor is driven by a capacitor start and run single-phase induction motor, and    when the compressor is operated at the power-saving operation, a plurality of running capacitors are connected to each other to increase a capacitor capacity.    
     
     
         5 . An air conditioner of variable capacity type which comprises a compressor capable of varying capacity in two levels by switching between full-power operation and power-saving operation and which is provided with a discharge pressure detector for the compressor, wherein 
 when a discharge pressure exceeds a predetermined value, the compressor is operated at the power-saving operation.    
     
     
         6 . The air conditioner of  claim 5 , wherein 
 the compressor is driven by a capacitor start and run single-phase induction motor, and    when the compressor is operated at the power-saving operation, a plurality of running capacitors are connected to each other to increase a capacitor capacity.    
     
     
         7 . An air conditioner of variable capacity type which comprises a compressor capable of varying capacity in two levels by switching between full-power operation and power-saving operation and which is provided with a temperature detector for an outdoor heat exchanger, wherein 
 when a temperature of the outdoor heat exchanger exceeds a predetermined value, the compressor is operated at the power-saving operation.    
     
     
         8 . The air conditioner of  claim 7 , wherein 
 the compressor is driven by a capacitor start and run single-phase induction motor, and    when the compressor is operated at the power-saving operation, a plurality of running capacitors are connected to each other to increase a capacitor capacity.    
     
     
         9 . An air conditioner of variable capacity type which comprises a compressor capable of varying capacity in two levels by switching between full-power operation and power-saving operation, wherein 
 the compressor starts operation at the power-saving operation.    
     
     
         10 . The air conditioner of  claim 9 , wherein 
 the compressor is driven by a capacitor start and run single-phase induction motor, and    the compressor starts operation at the power-saving operation, and at a same time, a plurality of running capacitors are connected to each other to increase a capacitor capacity.