| 摘要 |
PURPOSE:To prevent the frost generated on an outdoor heat-exchanger at the time of heating operation from remaining without being melted, for an air conditioning machine for which a plurality of heat-exchangers are used in the vertical direction. CONSTITUTION:For an air conditioning machine for which a plurality of outdoor heat-exchangers 9, 9a are used in the vertical direction, respective lowermost stages of the outdoor heat-exchangers 9, 9a, the frost on which is hard to melt at the time of defrosting, are made to be refrigerant circuits with supercooling coils 6, 6a, and a refrigerant with a high temperature is made to flow in the supercooling coils 6, 6a at the time of heating operation, and frosting is prevented. |
