Abstract: An indoor unit of an air conditioner is provided. The indoor unit includes a cabinet, a heat exchanger, and at least one ventilation unit. The cabinet includes a plurality of discharge ports formed on different surfaces thereof. The heat exchanger is installed in one side of the cabinet. The ventilation unit is installed inside the cabinet and includes a discharge port selectively communicating with one of the plurality of discharge ports of the cabinet.

Abstract: A water cooling type air conditioner is provided. The water cooling type air conditioner includes first and second heat exchangers, a refrigerant pipe, and a direction controlling unit. The first heat exchanger performs heat exchange between air and refrigerant. The second heat exchanger performs heat exchange between the refrigerant and cooling water. The refrigerant pipe is connected between the first heat exchanger and the second heat exchanger to guide a flow of the refrigerant. The direction controlling unit is disposed on one side of the second heat exchanger and controls the refrigerant and the cooling water flowing inside the second heat exchanger to flow in respectively opposite directions.

Abstract: An indoor unit of an air conditioner is provided. The indoor unit includes a cabinet, a heat exchanger, and at least one ventilation unit. The cabinet includes a plurality of discharge ports formed on different surfaces thereof. The heat exchanger is installed in one side of the cabinet. The ventilation unit is installed inside the cabinet and includes a discharge port selectively communicating with one of the plurality of discharge ports of the cabinet.

Abstract: A water-cooled air conditioner includes a first heat exchanger where indoor air is heat-exchanged with refrigerant, a compressor for compressing the refrigerant, an accumulator that is installed adjacent to the compressor to filter off liquid-phase refrigerant so that only gas-phase refrigerant can be introduced into the compressor, a plate-shaped second heat exchanger where the refrigerant compressed by the compressor is heat-exchanged with the water, and a refrigerant bypassing unit that selectively operates to allow a portion of the refrigerant compressed in the compressor to be directly returned to the second heat exchanger.

Abstract: A water cooling type air conditioner is provided. The water cooling type air conditioner includes first and second heat exchangers, a refrigerant pipe, and a direction controlling unit. The first heat exchanger performs heat exchange between air and refrigerant. The second heat exchanger performs heat exchange between the refrigerant and cooling water. The refrigerant pipe is connected between the first heat exchanger and the second heat exchanger to guide a flow of the refrigerant. The direction controlling unit is disposed on one side of the second heat exchanger and controls the refrigerant and the cooling water flowing inside the second heat exchanger to flow in respectively opposite directions.