To provide a compact cooling device by a liquid cooling method having superior cooling performance.
A first flow channel portion 12 and a second flow channel portion 13 are formed on a part of a heat absorbing face 11b and a heat sink face 11a of a cooling portion 11 having a Peltier element, an outflow port of the first flow channel portion 12 and an inflow port of the second flow channel portion 13 are connected by a connection pipe 14, and a refrigerant flowing out from the first flow channel portion 12 flows into the second flow channel portion 13 through the connection pipe 14. By cooling the heat sink face 11a by the refrigerant cooled in the first flow channel portion 12, the cooling performance can be improved and the miniaturization of the device can be achieved.
Hiroki Naito
Daisuke Nagano