Rosenberg, Klein & Lee
Device for dissipating heat and cutting off power of a pump
A heat dissipating and power cutting-off device of a pump has a heat dissipating ceramics ring fitted in a plastic member to form watertight connection in between to prevent water from flowing to a motor. The plastic member has a pivotal hole for a main blade wheel connected to a shaft of the motor, and for a shaft seal tightly fitted in same and said ceramics ring. The ring has an annular trench forming between on outer and an inner annular portions for increasing contact area with water so that heat passing through said ring can be dissipated to prevent plastic member from getting melted by said heat. A power cutting-off member is connected to the motor, and has a sensing element abutting the ceramics ring to sense a temperature of same for activation of the cutting-off member when a racing of the motor occurs to cause temperature of both the motor and the ring to rise.
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Wei-Sheng
Wang