US 12,178,014 B2
Cooling device and cooling method
Kento Kuwabara, Tokyo (JP)
Assigned to TMEIC Corporation, Chuo-ku (JP)
Appl. No. 17/287,586
Filed by TMEIC Corporation, Chuo-ku (JP)
PCT Filed Jul. 30, 2019, PCT No. PCT/JP2019/029792
§ 371(c)(1), (2) Date Apr. 22, 2021,
PCT Pub. No. WO2021/019676, PCT Pub. Date Feb. 4, 2021.
Prior Publication US 2021/0315131 A1, Oct. 7, 2021
Int. Cl. H05K 7/20 (2006.01)
CPC H05K 7/20281 (2013.01) [H05K 7/20263 (2013.01); H05K 7/20272 (2013.01); H05K 7/2039 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A cooling device comprising:
a first heat exchanger configured to exchange heat between a first cooling water and a second cooling water;
a first pipe through which the first cooling water circulates between the first heat exchanger and a heat sink, the heat sink being thermally connected to an electric device;
a second pipe through which the second cooling water circulates between a second heat exchanger and the first heat exchanger;
a bypass pipe that branches from the second pipe so that at least a part of the second cooling water flowing through the second pipe returns to the second pipe without passing through the first heat exchanger;
a flow changing mechanism configured to change a quantity of the second cooling water flowing from the second pipe into the bypass pipe; and
a controller including at least one of circuitry and a hardware processor that executes a program, the controller being configured to monitor a detection value related to at least a power loss of the electric device, configured to control the flow changing mechanism so that the quantity of the second cooling water flowing from the second pipe into the bypass pipe increases in a case where a value related to power loss of the electric device of the detection value is smaller than a first threshold, and configured to control the flow changing mechanism so that the quantity of the second cooling water flowing from the second pipe into the bypass pipe decreases in a case where a value related to power loss of the electric device of the detection value is equal to or larger than a second threshold,
wherein the controller is configured to calculate the power loss based on a current value of an output current of the electric device and a current-loss characteristics of the electric device.