Heat exchange type cooling apparatus for a transformer

A heat exchange type cooling apparatus for a transformer, comprising:

• an insulating oil circulation pipe configured in a closed circuit form so that an insulating oil filled in the transformer is discharged to the outside and then returns again to the transformer;
• an insulating oil pump configured to transfer the insulating oil;
• and
• an insulating oil cooling system configured to cool the insulating oil,
• wherein the insulating oil cooling system includes:
• a liquid refrigerant maintained in a liquid state during the entire circulation cycle;
• a refrigerant circulation pipe configured to circulate the liquid refrigerant;
• a refrigerant pump configured to transfer the liquid refrigerant;
• and
• a heat exchanging part configured to heat-exchange the liquid refrigerant and the insulating oil with each other to cool the insulating oil,
• the heat exchanging part including:
• a multi-layer channel part including a plurality of layers formed so that the insulating oil flows onto the plurality of layers;
• an inlet part disposed at an upper portion of the multi-layer channel part;
• an outlet part disposed at a lower portion of the multi-layer channel part;
• and
• a refrigerant casing part configured to enclose the multi-layer channel part and configured so that the liquid refrigerant flows around multi-layer channel part.