Abstract: An air conditioner and a method for controlling an air conditioner are provided. The air conditioner includes an outdoor unit including a compressor and a heat exchanger; and an indoor unit connected to the outdoor unit through a gas pipe and a liquid pipe and having a heat exchanger including first and second coils branched from the gas pipe in series. The indoor unit includes first and second manifolds connected by refrigerant pipes to enable refrigerant flow to the indoor heat exchanger, an expansion valve connected in parallel to the liquid pipe, a distributor in which expansion valves are connected in series and connected by a refrigerant pipe to enable refrigerant flow to the first coil, a refrigerant flow pipe that connects the first manifold and the second coil, a gas-liquid separator installed in the refrigerant flow pipe to phase-separate the refrigerant, a bypass pipe installed between the gas pipe and the gas-liquid separator, and a control valve installed on the gas pipe.

Abstract: An air conditioner is provided that may include a case having a supply flow path formed therein and through which outside air flows into an interior space, a first heat exchanger disposed on the supply flow path, in which refrigerant flows, and that exchanges heat between the air and the refrigerant, a second heat exchanger disposed downstream of the second heat exchanger on the supply flow path, in which refrigerant selectively flows, and that exchanges heat between the air and the refrigerant, and a refrigerant distributer configured to send the refrigerant to the first heat exchanger or the second heat exchanger.

Abstract: An air conditioner includes an outdoor unit comprising a compressor and an outdoor heat exchanger, and an indoor unit connected to the outdoor unit and provided with an indoor heat exchanger. The indoor unit includes a first refrigerant flow tube connecting an inlet side of the indoor heat exchanger to the outdoor unit, a second refrigerant flow tube connecting an outlet side of the indoor heat exchanger to the outdoor unit, a first bypass tube branched from a first branch point of the first refrigerant flow tube and joined to a first joining point of the second refrigerant flow tube, a second bypass tube branched from a second branch point of the first refrigerant flow tube and joined to a second joining point of the second refrigerant flow tube, and a flow switching valve disposed between the first and second joining points of the second refrigerant flow tube.

Abstract: An air conditioner comprises an outdoor unit including a compressor and an outdoor heat exchanger; and an indoor unit connected to the outdoor unit by a gas pipe and a liquid pipe and having an indoor heat exchanger including a first coil and a second coil branched from the gas pipe and connected in parallel, a first manifold and a second manifold connected by refrigerant pipes to enable refrigerant to flow to the indoor heat exchanger, a first expansion valve and a second expansion valve connected in parallel to the liquid pipe and that block or expand the refrigerant, refrigerant flow pipes connecting a gas pipe side of the first manifold and an outlet side of the second expansion valve, a third expansion valve installed on the refrigerant flow pipe to block or expand the refrigerant, and a control valve installed on the gas pipe to block the refrigerant.

Abstract: An air conditioner may include a case having a supply channel therein through which external air flows into an interior space; a first heat exchanger disposed on the supply channel and in which the air and refrigerant exchange heat; a second heat exchanger disposed at a downstream side of the first heat exchanger in the supply channel, and in which the air and refrigerant exchange heat; and a refrigerant distributor that sends refrigerant to the first heat exchanger or the second heat exchanger.

Abstract: An air conditioner and a method for controlling an air conditioner are provided. The air conditioner may include an air handling unit; a return duct connected to the air handling unit to supply ventilation air to the air handling unit; an outside air introduction duct connected to the air handling unit to introduce outdoor air into a room; a damper module installed at a position at which the return duct and the outside air introduction duct are connected to each other and including a damper that opens or closes the return duct and the outside air introduction duct; a detector installed in the damper module to detect a temperature, humidity, enthalpy, and air pressure of air flowing through the damper module; and a controller that selectively and variably controls an opening amount of the damper based on a measured value and a set value of the detector.

Abstract: An air conditioner includes an outdoor unit comprising a compressor and an outdoor heat exchanger, and an indoor unit connected to the outdoor unit and provided with an indoor heat exchanger. The indoor unit includes a first refrigerant flow tube configured to connect an inlet side of the indoor heat exchanger to the outdoor unit, a second refrigerant flow tube configured to connect an outlet side of the indoor heat exchanger to the outdoor unit, a first bypass tube branched from a first branch point of the first refrigerant flow tube and joined to a first joining point of the second refrigerant flow tube, a second bypass tube branched from a second branch point of the first refrigerant flow tube and joined to a second joining point of the second refrigerant flow tube, and a flow switching valve disposed between the first joining point and the second joining point of the second refrigerant flow tube.

Abstract: An air conditioner and a method for controlling an air conditioner are provided.

Abstract: An air conditioner comprises an outdoor unit including a compressor and an outdoor heat exchanger; and an indoor unit connected to the outdoor unit by a gas pipe and a liquid pipe and having an indoor heat exchanger including a first coil and a second coil branched from the gas pipe and connected in parallel, a first manifold and a second manifold connected by refrigerant pipes to enable refrigerant to flow to the indoor heat exchanger, a first expansion valve and a second expansion valve connected in parallel to the liquid pipe and that block or expand the refrigerant, refrigerant flow pipes connecting a gas pipe side of the first manifold and an outlet side of the second expansion valve, a third expansion valve installed on the refrigerant flow pipe to block or expand the refrigerant, and a control valve installed on the gas pipe to block the refrigerant.

Abstract: An air conditioner may include an outdoor unit including a compressor and an outdoor heat exchanger configured to heat exchange compressed refrigerant; an indoor unit having an air inlet and an air outlet and connected with the outdoor unit through a first pipe through which refrigerant discharged from the compressor flows and a second pipe through which refrigerant discharged from the outdoor heat exchanger flows; a blowing fan disposed in the indoor unit; a main heat exchanger configured to heat exchange air, which flows inside through the air inlet, and connected with the second pipe; a reheat exchanger disposed downstream of the main heat exchanger and connected with the first pipe; and a waste heat exchanger disposed upstream of the main heat exchanger and configured to heat-exchange air, which flows inside through the air inlet, and condensate water, which is produced at the main heat exchanger, with each other.

Abstract: An air conditioner is provided that may include a case having a supply flow path formed therein and through which outside air flows into an interior space, a first heat exchanger disposed on the supply flow path, in which refrigerant flows, and that exchanges heat between the air and the refrigerant, a second heat exchanger disposed downstream of the second heat exchanger on the supply flow path, in which refrigerant selectively flows, and that exchanges heat between the air and the refrigerant, and a refrigerant distributer configured to send the refrigerant to the first heat exchanger or the second heat exchanger.

Abstract: An air conditioner may include a case having a supply channel therein through which external air flows into an interior space; a first heat exchanger disposed on the supply channel and in which the air and refrigerant exchange heat; a second heat exchanger disposed at a downstream side of the first heat exchanger in the supply channel, and in which the air and refrigerant exchange heat; and a refrigerant distributor that sends refrigerant to the first heat exchanger or the second heat exchanger.

Abstract: An air conditioner may include an outdoor unit including a compressor and an outdoor heat exchanger configured to heat exchange compressed refrigerant; an indoor unit having an air inlet and an air outlet and connected with the outdoor unit through a first pipe through which refrigerant discharged from the compressor flows and a second pipe through which refrigerant discharged from the outdoor heat exchanger flows; a blowing fan disposed in the indoor unit; a main heat exchanger configured to heat exchange air, which flows inside through the air inlet, and connected with the second pipe; a reheat exchanger disposed downstream of the main heat exchanger and connected with the first pipe; and a waste heat exchanger disposed upstream of the main heat exchanger and configured to heat-exchange air, which flows inside through the air inlet, and condensate water, which is produced at the main heat exchanger, with each other.

Abstract: A micro channel type heat exchanger in which a first heat exchange module and a second heat exchange module are stacked, the micro channel type heat exchanger including a plurality of flat tubes disposed within the first heat exchange module and the second heat exchange module, and a heat blocking member configured to form a heat blocking space by separating the first heat exchange module and the second heat exchange module, wherein the heat blocking member forms a heat blocking space between the first heat exchange module and the second heat exchange module that minimizes heat conductivity and improves thermal exchange performance of the heat exchanger.

Abstract: A micro channel type heat exchanger having a first pass disposed in some flat tubes located in a first heat exchange module and along which a refrigerant flows in one direction, a second pass disposed in some of the remaining flat tubes located in the first heat exchange module and along which the refrigerant supplied from the first pass flows in an opposite direction to that of the first pass, a third pass distributed and located in the remainder of flat tubes located in the first heat exchange module other than the first pass and the second pass and in some flat tubes located in a second heat exchange module, and a fourth pass disposed in the remainder of the flat tubes located in the second heat exchange module and along which a refrigerant supplied from the third pass flows in an opposite direction to a direction of the third pass.

Abstract: An air conditioning system that includes at least one indoor unit that uses water as a working fluid, an outdoor unit that uses a refrigerant as a working fluid, the outdoor unit including a compressor compressing the refrigerant and an outdoor heat exchanger for heat-exchange with the refrigerant, and a heat collection unit connecting the at least one indoor unit to the outdoor unit, the heat collection unit including at least one heat exchange part for heat-exchanging water supplied from the at least one indoor unit with the refrigerant supplied from the outdoor unit.

Abstract: An air conditioner and a method for controlling an air conditioner are provided that efficiently inject a refrigerant into a compressor. The air conditioner may include a compressor to compress a refrigerant; a condenser to condense the refrigerant compressed at the compressor; an evaporator to evaporate the refrigerant condensed at the condenser; and an injection module to selectively or simultaneously inject some or a portion of the refrigerant flowing from the condenser to the evaporator into a high pressure side and a low pressure side of the compressor.

Abstract: An air conditioner and a method for controlling an air conditioner are provided that inject a refrigerant into a compressor to perform a defrosting operation. The air conditioner may include a compressor; an outdoor heat exchanger; an indoor heat exchanger; a first injection module that injects a refrigerant flowing from the indoor heat exchanger to the outdoor heat exchanger into the compressor during a heating operation and that does not inject a refrigerant flowing from the outdoor heat exchanger to the indoor heat exchanger into the compressor during a defrosting operation; and a second injection module that injects a refrigerant flowing from the indoor heat exchanger to the outdoor heat exchanger into the compressor during the heating operation and that injects a refrigerant flowing from the outdoor heat exchanger to the indoor heat exchanger into the compressor during the defrosting operation.

Abstract: A scroll compressor and an air conditioner including a scroll compressor are provided.

Abstract: An air conditioner includes a compressor, an outdoor heat exchanger, an indoor heat exchanger, a converting unit, a first injection module, and a second injection module. The first injection module injects a portion of refrigerant flowing from the indoor heat exchanger to the outdoor heat exchanger to the compressor in a heating operation and supercools refrigerant flowing from the outdoor heat exchanger to the indoor heat exchanger in a cooling operation. The second injection module injects a portion of refrigerant flowing from the indoor heat exchanger to the outdoor heat exchanger to the compressor in the heating operation and injects refrigerant flowing from the outdoor heat exchanger to the indoor heat exchanger to the compressor in the cooling operation.