| 摘要 |
The present invention relates to an outdoor unit of a heat pump air conditioner having a defrost heater. The outdoor unit of a heat pump air conditioner having a defrost heater determines whether or not an outdoor evaporator is frozen based on a signal inputted through an outdoor evaporator freezing sensor attached to a surface of an outdoor evaporator and defrosts the outdoor evaporator using a defrost heater emitting far-infrared radiant heat or near-infrared radiant heat installed inside and outside the outdoor unit. Therefore, the outdoor unit of a heat pump air conditioner having a defrost heater can be efficiently operated and reduce waste of operation power of a compressor consumed for defrost operation without the need to switch an operation mode of a heat pump from a heating mode to a cooling mode for defrost operation as opposed to conventional apparatus. |
