Patent application number | Description | Published |
20080209924 | AIR CONDITIONER AND CONTROL METHOD THEREOF - An air conditioner including a plurality of compressors uses at least one oil separator for separating oil from an oil-mixed refrigerant discharged from the compressors. The air conditioner performs an oil balancing operation, during which some compressors operate and some do not. At least a portion of the oil separated by the oil separator is distributed to the compressors that are not operating during the oil balancing operation. | 09-04-2008 |
20080236185 | AIR CONDITIONER - An air conditioner including an indoor heat exchange unit to perform a heat exchange process by the supply and absorption of heat through the circulation of a first refrigerant, at least one outdoor heat exchange unit to perform a heat exchange process by the absorption and supply of heat through the circulation of a second refrigerant, and an intermediate connection unit to perform a heat exchange between the first refrigerant and the second refrigerant. | 10-02-2008 |
20100170270 | AIR CONDITIONER AND DEFROSTING OPERATION METHOD OF THE SAME - An air conditioner is provided, in which some of a plurality of outdoor heat exchangers implement a defrosting operation and others implement a heating operation. The air conditioner includes a compressor to compress refrigerant, a hot gas pipe to which a part of the refrigerant compressed in the compressor is moved, a 4-way valve to which the remaining refrigerant compressed in the compressor is moved, an indoor heat exchanger in which the refrigerant, having passed through the 4-way valve, undergoes heat exchange with indoor air, and a plurality of outdoor heat exchangers, some of which implement a heating operation as the heat-exchanged refrigerant from the indoor heat exchanger is moved therethrough while others implement a defrosting operation as the refrigerant having passed through the hot gas pipe is moved therethrough. | 07-08-2010 |
20100174412 | AIR CONDITIONER AND METHOD FOR DETECTING MALFUNCTION THEREOF - An air conditioner, which automatically detects malfunction, and a method for detecting a malfunction thereof are provided. The method includes: measuring an indoor unit pipe temperature around an indoor heat exchanger during operation of the air conditioner; actuating an indoor expansion valve connected to the indoor heat exchanger to a first state; and detecting whether or not a variation of the indoor unit pipe temperature is abnormal by measuring the indoor unit pipe temperature after actuating the indoor expansion valve to the first state. | 07-08-2010 |
20100206000 | Air conditioner and method of controlling the same - An air conditioner includes a plurality of compressors, a common intake pipe, and a plurality of oil equalizing pipes that connect the compressors to the common intake pipe such that oil existing above a reference oil level in the compressors can be transferred to the common intake pipe. An oil equalizing valve provided on at least two of the oil equalizing pipes controls oil flowing through the oil equalizing pipes, where at least two of the oil equalizing valves can be opened together during performance of oil equalizing operation such that amounts of the oil in at least two compressors can be equalized. | 08-19-2010 |
20100212342 | AIR CONDITIONER AND METHOD OF CONTROLLING THE SAME - An air conditioner includes a compressor, a first heat exchanger, and a first pipe configured to allow refrigerant to flow from the first heat exchanger. A bypass pipe is branched off from the first pipe and is configured to expand refrigerant flowing through the bypass pipe. A second heat exchanger is configured to allow the expanded refrigerant of the bypass pipe to heat-exchange with the refrigerant flowing along the first pipe. A second pipe couples the second heat exchanger to the compressor so that the refrigerant expanded by the bypass pipe and heat-exchanged at the second heat exchanger can be introduced into the compressor. | 08-26-2010 |