Patent ID: 6978856

Claim:
An electrical apparatus having a liquid path including a space for allowing a cooling medium for cooling a heating member to flow therein, said liquid path comprising: a cooling part formed at the place corresponding to said heating member; an introducing part for being continuous with said cooling part, and for introducing said cooling medium supplied from an outside into said cooling part; and a draining part for being continuous with said cooling part, and for draining said cooling medium introduced into said cooling part to the outside, wherein said liquid path is configured so that the cross-sectional area of the liquid path extending from said introducing part up to said draining part through said cooling part is substantially constant, wherein the liquid path width at the leading edge of said introducing part is equal to that at the trailing edge of said draining part and smaller than that in said cooling part, and wherein the liquid path depth at the leading edge of said introducing part is equal to that at the trailing edge of said draining part and larger than that in said cooling part.