# US 2014/0197912 A1 · Heat exchange type cooling apparatus for a transformer > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0197912 A1 - Document ID: US20140197912A1 - Status: Published application - Kind: A1 - Application number: 14/014,466 - Filed: 2013-08-30 - Published: 2014-07-17 - Earliest claimed: 2013-01-16 - Inventors: Gap-Dong KIM - Web page: https://patentgrep.com/patent/US20140197912A1 ## CPC - H01F 27/008: {with temperature compensation} - H01F 27/12: Oil cooling - H01F 27/16: Water cooling - H01F: MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES ## Abstract Disclosed herein is a heat exchange type cooling apparatus for a transformer, including: 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. ## Claims ### Claim 1 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. ### Claim 2 (depends on 1) The heat exchange type cooling apparatus for a transformer of claim 1, wherein the liquid refrigerant has a boiling point of 120° C. or more. ### Claim 3 (depends on 1) The heat exchange type cooling apparatus for a transformer of claim 1, wherein the liquid refrigerant includes ethylene glycol (EG). ### Claim 4 (depends on 1) The heat exchange type cooling apparatus for a transformer of claim 1, wherein the multi-layer channel part, the inlet part, the outlet part, and the refrigerant casing part are made of a stainless steel. ### Claim 5 (depends on 1) The heat exchange type cooling apparatus for a transformer of claim 1, wherein the respective channel parts forming the multi-layer channel part are formed by bending a metal thin plate in a rectangular shape. ### Claim 6 (depends on 5) The heat exchange type cooling apparatus for a transformer of claim 5, wherein the metal thin plate has a thickness t of 0.4 to 0.8 mm. ### Claim 7 (depends on 5) The heat exchange type cooling apparatus for a transformer of claim 5, wherein the respective channel parts have a rectangular cross section and have an inner side short width h of 1.8 to 2.2 mm and an inner side long width w of 80 to 120 mm. ### Claim 8 (depends on 7) The heat exchange type cooling apparatus for a transformer of claim 7, wherein the multi-layer channel part includes a first multi-layer channel part and a second multi-layer channel part disposed to be spaced apart from each other by a predetermined horizontal distance. ### Claim 9 (depends on 1) The heat exchange type cooling apparatus for a transformer of claim 1, wherein the inlet part includes a guide plate branching a flow channel into a plurality of parts so that the insulating oil is uniformly supplied to the multi-channel part. ### Claim 10 (depends on 1) The heat exchange type cooling apparatus for a transformer of claim 1, further comprising a controlling plate configured to control a set cooling temperature of the heat exchanging part to be higher in the summer than in the winter. ### Claim 11 (depends on 1) The heat exchange type cooling apparatus for a transformer of claim 1, wherein the refrigerant pump includes a motor part and an impeller part transferring the refrigerant by the motor part, and the refrigerant is configured to be circulated to an inner portion of the motor part. ### Claim 12 (depends on 1) The heat exchange type cooling apparatus for a transformer of claim 1, wherein the insulating oil circulation pipe, the insulating oil pump, and the insulating oil cooling system include: a first insulating oil circulation pipe, a first insulating oil pump transferring an insulating oil in the first insulating oil circulation pipe, and a first insulating oil cooling system cooling the insulating oil in the first insulating oil circulation pipe, which are disposed at one side of one transformer; and a second insulating oil circulation pipe, a second insulating oil pump transferring an insulating oil in the second insulating oil circulation pipe at the time of an emergency, and a second insulating oil cooling system cooling the insulating oil in the second insulating oil circulation pipe, which are disposed at the other side of one transformer.