Outdoor unit of air conditioner

Abstract

An outdoor unit includes: two fan motors that respectively drive two outdoor fans arranged one above the other; a controller including a fan motor power supply capable of separately supplying power to each of the two fan motors connected to two fan motor connectors; and an electrical component temperature sensor that measures temperatures of electrical components. The controller includes a control circuitry that detects which of the two fan motor connectors each of the two fan motors is connected to and supplies power in such a way as to drive the upper one of the outdoor fans based on a result of the detection at the time of single-fan operation. The detection is performed based on comparison between temperatures of the electrical components at the start of the single-fan operation and temperatures of the electrical components after a set time has elapsed since the start of the single-fan operation.

1 . An outdoor unit of an air conditioner, comprising:
 a refrigerant circuit including a compressor, a flow path switch, an outdoor heat exchanger, a decompressor, and indoor heat exchangers connected via refrigerant pipes;   two outdoor fans to supply air to the outdoor heat exchanger, the two outdoor fans being arranged one above another;   two fan motors to drive the respective two outdoor fans;   a controller including two fan motor connectors and a fan motor power supply, the two fan motor connectors being capable of being connected to the fan motors, the fan motor power supply being capable of separately supplying power to each of the two fan motors connected to the fan motor connectors; and   electrical component temperature sensors to measure temperatures of electrical components including at least components included in the controller, the electrical component temperature sensors being installed in an electrical component box in which the controller is enclosed, wherein   the controller includes a control circuitry, wherein
 at a time of single-fan operation in which only upper one of the two outdoor fans is operated, the control circuitry is configured: 
 to detect each of the two fan motors is connected to which of the two fan motor connectors; and 
 to supply power in such a way to drive upper one of the outdoor fans based on a result of the detection, wherein 
 the detection is performed based on comparison between temperatures of the electrical components at a start of the single-fan operation and temperatures of the electrical components after a set time has elapsed since the start of the single-fan operation. 
   
     
     
         2 . The outdoor unit of the air conditioner according to  claim 1 , further comprising:
 a connection state memory to store connection state information indicating each of the two fan motors is connected to which of the two fan motor connectors, wherein   the control circuitry is configured:
 to read out the connection state information from the connection state memory at the start of the single-fan operation; and 
 to determine the fan motor to be supplied with power through the fan motor power supply.