| 摘要 |
<P>PROBLEM TO BE SOLVED: To obtain a motor protective device which is used for a sealed motor compressor and has a function to detect an abnormal refrigerant pressure together with an over-current and an overheat. <P>SOLUTION: A pressure-proof container is constituted of a container 2 and a cover plate 3 in the motor protective device 1. A stationary contact point 9 is adhered to one electroconductive terminal pin 8A insert-penetrating and fixed to the cover plate 3. A thermally-actuating plate 5 is connected with and fixed to the inner face of the container 2, and the movable contact point 6 is arranged open-close free with the stationary contact point 9. In the motor protective device 1, because a thermally-actuating plate fixing position 2A of the container 2 is flattened and deformed, the pressure between the contact points is adjusted, and the operated temperature is calibrated. A displacement part 2B which is made easier to deform by making the plate thickness thinner than that of its peripheral part is installed in the vicinity of the thermally- actuated plate fixing position. The operating temperature of the thermally- actuated plate can be reduced because the displacement part 2B of the container is deformed in the smashed direction if it is exposed to a high pressure state. Therefore, the current supply can be cut off under a high pressure. <P>COPYRIGHT: (C)2004,JPO |
