| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a motor-driven pump with an enhanced reliability of its peripheral electronic part by thermally insulating the heat generating region of the circuit board from the other regions, an excellent waterproofness of the circuit board and further. <P>SOLUTION: The motor-driven pump is composed of a pump housing 1, a bulkhead 2 in connection with the pump housing 1, a rotor 3 consisting of an impeller 32 and a magnet rotor part 31 and mounted inside the bulkhead 2 rotatably, a ring-shaped solenoid coil 4 surrounding the outside of the bulkhead 2 in the circumferential direction, the circuit board 5 having the heat generating region 51a and a cold region 51d, a covering resin member 6 to cover at least the front surface of the circuit board 5 approximately over the whole area, and a thermally insulating part A to reduce the heat conduction between the heat generating region 51a and the cold region 51d. The thermally insulating part A is formed in the covering resin member 6. <P>COPYRIGHT: (C)2009,JPO&INPIT |
