Abstract: An air conditioner including: a housing having a discharge port and a plurality of holes; a door capable of closing the discharge port; a heat exchanger provided in the housing; a compressor connected to the heat exchanger so as to circulate a refrigerant so that same passes through the heat exchanger: a fan for blowing air so that the air passes through the heat exchanger and is discharged through the discharge port and at least one of the plurality of holes. The air conditioner includes a humidity sensor provided inside the housing so as to sense the humidity of the air having passed through the heat exchanger: and a control unit for controlling the door so as to open or close the discharge port and rotating the fan, on the basis of the humidity sensed by the humidity sensor when the compressor has been stopped.

Abstract: A method of controlling an air conditioner including a compressor, an outdoor heat exchanger, an expansion valve and an indoor unit, includes detecting an indoor temperature and an outdoor temperature and checking an indoor load and an outdoor load when an operation command is input, determining an operation frequency of the compressor and a degree of opening of the expansion valve based on the checked indoor load and the outdoor load, driving the compressor at the determined operation frequency and opening the expansion valve to the determined degree of opening, thereby supplying a refrigerant to an indoor heat exchanger having a first cooling panel and a second cooling panel disposed parallel to each other, controlling a rate of rotation of each of the indoor fans based on the operation frequency of the compressor and the degree of opening of the expansion valve.

Abstract: An indoor unit of an air conditioner has an improved discharge structure of air. The indoor unit of an air conditioner includes a panel which defines an external appearance thereof and has an opening, a mixed flow fan which is located within the panel, a heat exchanger unit which is located rearward of the mixed flow fan, an inlet port which is located rearward of the heat exchanger unit so that air is suctioned from rearward of the heat exchanger unit to be introduced into the mixed flow fan, an outlet port which is exposed forward of the panel through the opening so that the air passing though the mixed flow fan is discharged through a front portion of the panel, and a plurality of circular louvers to open and close the outlet port by moving outwards from a center of the outlet port.

Abstract: An indoor unit of an air conditioner having improved structures of suction, discharge and/or flow passages which may increase operation efficiency, reduce noises and realize a compact size. The indoor unit includes a housing comprising a front panel and a rear panel coupled to a rear portion of the front panel, at least one discharge outlet exposed to a front of the front panel, at least one suction inlet formed in the rear panel at a position corresponding to the discharge outlet, at least one heat exchanger disposed at a front portion of the suction inlet to absorb heat from air introduced through the suction inlet or transfer heat to the air introduced through the suction inlet, and at least one diagonal flow fan disposed between the heat exchanger and the discharge outlet to suction air passing through the heat exchanger and discharge the air through the discharge outlet.

Abstract: A method of controlling an air conditioner including a compressor, an outdoor heat exchanger, an expansion valve and an indoor unit, includes detecting an indoor temperature and an outdoor temperature and checking an indoor load and an outdoor load when an operation command is input, determining an operation frequency of the compressor and a degree of opening of the expansion valve based on the checked indoor load and the outdoor load, driving the compressor at the determined operation frequency and opening the expansion valve to the determined degree of opening, thereby supplying a refrigerant to an indoor heat exchanger having a first cooling panel and a second cooling panel disposed parallel to each other, controlling a rate of rotation of each of the indoor fans based on the operation frequency of the compressor and the degree of opening of the expansion valve.

Abstract: An indoor unit of an air conditioner has an improved discharge structure of air. The indoor unit of an air conditioner includes a panel which defines an external appearance thereof and has an opening, a mixed flow fan which is located within the panel, a heat exchanger unit which is located rearward of the mixed flow fan, an inlet port which is located rearward of the heat exchanger unit so that air is suctioned from rearward of the heat exchanger unit to be introduced into the mixed flow fan, an outlet port which is exposed forward of the panel through the opening so that the air passing though the mixed flow fan is discharged through a front portion of the panel, and a plurality of circular louvers to open and close the outlet port by moving outwards from a center of the outlet port.

Abstract: An indoor unit of an air conditioner having improved structures of suction, discharge and/or flow passages which may increase operation efficiency, reduce noises and realize a compact size. The indoor unit includes a housing comprising a front panel and a rear panel coupled to a rear portion of the front panel, at least one discharge outlet exposed to a front of the front panel, at least one suction inlet formed in the rear panel at a position corresponding to the discharge outlet, at least one heat exchanger disposed at a front portion of the suction inlet to absorb heat from air introduced through the suction inlet or transfer heat to the air introduced through the suction inlet, and at least one diagonal flow fan disposed between the heat exchanger and the discharge outlet to suction air passing through the heat exchanger and discharge the air through the discharge outlet.

Abstract: A multi-stage operation type air conditioner which can be operated in various cooling or heating capacities. The multi-stage operation type air conditioner includes a first discharge port, a first opening/closing device for opening or closing the first discharge port, a second discharge port having a size different from that of the first discharge port, a second opening/closing device for opening or closing the second discharge port, and a controller for controlling the air conditioner such that the air conditioner may be operated with one of the first and second discharge ports opened, in an operation with a lower cooling or heating load, and the air conditioner may be operated with both the first and second discharge ports opened, in an operation with a higher cooling or heating load.

Abstract: A refrigerant cycle system in which the arrangement of a connecting pipe for connection between a compressor and an accumulator is improved effectively to recover oil collected in the accumulator to the compressor. The accumulator is installed to be separate from the compressor. A connecting pipe is arranged between the compressor and the accumulator to feed a refrigerant gas separated in the accumulator to the compressor. An oil recovery hole is provided at an inlet portion of the connecting pipe received in the accumulator such that it is arranged at a level higher than a highest level portion of the connecting pipe located outside of the accumulator. A second accumulator may be connected between the connecting pipe and the compressor while being directly installed at the compressor. In this case, the connecting pipe has an outlet portion connected to the second accumulator.

Abstract: A refrigerant cycle system in which the arrangement of a connecting pipe for connection between a compressor and an accumulator is improved effectively to recover oil collected in the accumulator to the compressor. The accumulator is installed to be separate from the compressor. A connecting pipe is arranged between the compressor and the accumulator to feed a refrigerant gas separated in the accumulator to the compressor. An oil recovery hole is provided at an inlet portion of the connecting pipe received in the accumulator such that it is arranged at a level higher than a highest level portion of the connecting pipe located outside of the accumulator. A second accumulator may be connected between the connecting pipe and the compressor while being directly installed at the compressor. In this case, the connecting pipe has an outlet portion connected to the second accumulator.