| 摘要 |
An air conditioner is provided. The air conditioner includes: a compressor (2) for compressing a refrigerant; an indoor heat exchanger (10) for cooling or heating indoor with a refrigerant; an outdoor heat exchanger (20) for exchanging heat of a refrigerant and outdoor air; an outdoor fan (22) for ventilating outdoor air to the outdoor heat exchanger (20); a cooling/heating switching valve (50) for switching cooling/heating; a first expansion device (40) installed between the indoor heat exchanger (10) and the outdoor heat exchanger (20); a carbon nano tube (CNT) heater module (50) installed between the outdoor heat exchanger (20) and the cooling/heating switching valve (50) to evaporate a refrigerant; a second expansion device (60) installed between the outdoor heat exchanger (20) and the CNT heater module (50); and a controller (100) for sustaining, when performing a heating operation, if a defrost condition becomes, a heating mode of the cooling/heating switching valve (50), fully opening the first expansion device (40), adjusting an opening degree so that the second expansion device (60) expands a refrigerant, and performing a continuous heating defrost operation for operating the CNT heater module (50). Therefore, continuous heating can be performed with an indoor heat exchanger while defrosting an outdoor heat exchanger. |
