A refrigerant regenerating apparatus comprising: a regenerator into which a refrigerant flows and from which the refrigerant is discharged, the regenerator configured to separate and discharge oil contained in a refrigerant flowing in the regenerator; and a recoverer into which the refrigerant discharged from the regenerator flows, the recoverer including a compressor configured to compress a refrigerant flowing in the recoverer and a heat exchanger configured to condense a refrigerant discharged from the compressor, wherein the regenerator comprises: a charger configured to charge oil contained in the refrigerant flowing in the regenerator with positive ions or negative ions using corona discharge; and a collector configured to electrically collect the oil charged through the charger, wherein the charger further comprises: a discharge electrode disposed in a channel for a refrigerant flowing into the charger; a ground electrode spaced apart from the discharge electrode and electrically connected to the discharge electrode; and a power source configured to apply a voltage between the discharge electrode and the ground electrode, characterized in that the discharge electrode includes a plurality of discharge electrodes spaced apart from each other in the flow direction of a refrigerant flowing into the charger, each of the plurality of discharger electrodes is electrically connected to the ground electrode. a regenerator into which a refrigerant flows and from which the refrigerant is discharged, the regenerator configured to separate and discharge oil contained in a refrigerant flowing in the regenerator; and a recoverer into which the refrigerant discharged from the regenerator flows, the recoverer including a compressor configured to compress a refrigerant flowing in the recoverer and a heat exchanger configured to condense a refrigerant discharged from the compressor, wherein the regenerator comprises: a charger configured to charge oil contained in the refrigerant flowing in the regenerator with positive ions or negative ions using corona discharge; and a collector configured to electrically collect the oil charged through the charger, wherein the charger further comprises: a discharge electrode disposed in a channel for a refrigerant flowing into the charger; a ground electrode spaced apart from the discharge electrode and electrically connected to the discharge electrode; and a power source configured to apply a voltage between the discharge electrode and the ground electrode, characterized in that the discharge electrode includes a plurality of discharge electrodes spaced apart from each other in the flow direction of a refrigerant flowing into the charger, each of the plurality of discharger electrodes is electrically connected to the ground electrode. a charger configured to charge oil contained in the refrigerant flowing in the regenerator with positive ions or negative ions using corona discharge; and a collector configured to electrically collect the oil charged through the charger, wherein the charger further comprises: a discharge electrode disposed in a channel for a refrigerant flowing into the charger; a ground electrode spaced apart from the discharge electrode and electrically connected to the discharge electrode; and a power source configured to apply a voltage between the discharge electrode and the ground electrode, characterized in that the discharge electrode includes a plurality of discharge electrodes spaced apart from each other in the flow direction of a refrigerant flowing into the charger, each of the plurality of discharger electrodes is electrically connected to the ground electrode. a discharge electrode disposed in a channel for a refrigerant flowing into the charger; a ground electrode spaced apart from the discharge electrode and electrically connected to the discharge electrode; and a power source configured to apply a voltage between the discharge electrode and the ground electrode, characterized in that the discharge electrode includes a plurality of discharge electrodes spaced apart from each other in the flow direction of a refrigerant flowing into the charger, each of the plurality of discharger electrodes is electrically connected to the ground electrode.