Energy efficiency of room air conditioner or unitary air conditioning system by using dual suction compressor

A high-efficiency air conditioning system for chilling an interior of a building comprising:

• a dual-suction compressor;
• a condenser having a condenser fan associated with the condenser that moves air to cool the condenser;
• at least two evaporators wherein a first evaporator operates at a first evaporator pressure and a second evaporator operates at a second evaporator pressure that is different than the first evaporator pressure;
• at least a first throttling device and a second throttling device having different throttling characteristics with the first throttling device being less restrictive than the second throttling device;
• and
• a plurality of refrigerant conduits;
• and
• wherein a refrigerant fluid leaves the compressor along a common refrigerant flow-path portion of a refrigerant circuit from the compressor, through the condenser and into the first and second throttling devices which split the common flow-path portion of the refrigerant circuit and deliver refrigerant fluid to the first evaporator and to the second evaporator forming a first evaporator circuit portion and a second evaporator circuit portion of the refrigerant circuit and wherein the first evaporator circuit portion operates at a higher temperature than the second evaporator circuit portion and wherein the first evaporator circuit portion delivers to refrigerant fluid to a first suction port of the dual suction compressor and the second evaporator circuit portion delivers refrigerant fluid to a second suction port of the dual suction compressor and the first evaporator circuit portion and the second evaporator circuit portion merge and rejoin the refrigerant fluid into the common refrigerant flow-path portion;
• and
• wherein the compressor, condenser are all positioned outside of the building and the first evaporator and the second evaporator are positioned within the building.