Patent ID: 8280557

Claim:
An air-conditioning apparatus comprising: a first heat source unit having a first heat source-side heat exchanger and a first heat source-side degree of subcooling adjustment device configured to adjust a first degree of subcooling in an outlet side of the first heat source-side heat exchanger, the first heat source-side heat exchanger being operable at least as a condenser; a second heat source unit having a second heat source-side heat exchanger and a second heat source-side degree of subcooling adjustment device configured to adjust a second degree of subcooling in an outlet side of the second heat source-side heat exchanger, the second heat source-side heat exchanger being operable at least as a condenser; a first determination unit configured to determine the first degree of subcooling; a second determination unit configured to determine the second degree of subcooling; and a controller configured to control the first heat source-side degree of subcooling adjustment device and the second heat source-side degree of subcooling adjustment device such that a difference between the first degree of subcooling and the second degree of subcooling is reduced when refrigerant is charged into a refrigerant circuit having the first and second heat source-side heat exchangers.