| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a heat insulation device capable of suppressing the dissipation of heat from a member with heat generation and capable of remarkably simplifying a configuration used for suppressing the heat dissipation. <P>SOLUTION: The heat insulation device includes: a motor 21; and a casing 42 surrounding the motor 21 and being arranged between a closing cover 51 configuring a closed space 54 and the motor. The casing 42 is configured by selecting a plurality of metallic materials having mutually different heat capacities and mutually joining the metallic materials so that the heat capacities are increased towards the downstream side from the air-current upstream side in the space. In the casing, a leading-out part 55 extracting an air current in the space 54 to the outside is formed near an end on the air-current downstream side in the space 54, and an introducing part 56 extracting the outside air into the space 54 is formed near the air-current upstream side in the space 54. <P>COPYRIGHT: (C)2010,JPO&INPIT |
