Patent ID: 7997097

Claim:
An air conditioner comprising: a variable speed compressor; a four-way valve; an outdoor heat exchanger; a decompression device; an indoor heat exchanger; an accumulator; a bypass pipe which connects a discharge side of the compressor and an outlet of the accumulator and has a two-way valve therein; a compressor temperature sensor constructed and arranged to detect a temperature of the compressor; and a controller constructed and arranged to open the two-way valve and charge the maximum operating frequency of the compressor on the basis of the temperature detected by the compressor temperature sensor when the temperature detected by the compressor temperature sensor is less than or equal to a first determination temperature at the time of the startup of the compressor after the air conditioner is operated, and close the two-way valve when the temperature detected by the compressor temperature sensor is greater than or equal to a second determination temperature, wherein the variable speed compressor, the four-way valve, the outdoor heat exchanger, the decompression device, the indoor heat exchanger, and the accumulator are connected to one another in a ring shape, and wherein, when the temperature detected by the compressor temperature sensor is greater than or equal to the second determination temperature, the two-way valve is closed, and when the amount of reduction in the detected temperature is more than a predetermined value after a predetermined time has elapsed since the closing of the two-way valve, the two-way valve is opened until the temperature of the compressor is greater than or equal to the second determination temperature again.