| 摘要 |
A laundry dryer is provided with a safety device for preventing overheating of the laundry in case of mechanical failure of the machine. The dryer comprises a drum (6) adapted to be rotated by a motor (8) through a transmission belt (11) extending around a belt pulley (9) of said motor (8) and said drum (6) and kept under tension by at least one tensioning roller (12) carried by a spring-loaded lever (13) pivotally mounted in the frame of the machine. The safety device comprises a slider element (16) connected to said lever (13) through a spring (21) and adapted to actuate a microswitch (15) connected to the motors (8, 26) driving said drum and a blower, and to a heater element (27) of the machine. Rupture of said driving belt (11) or of the return spring (14) connected to said lever (13) causes said slider element (16) to move in one of two opposite directions for actuating said switch (15) to its open position in both cases. As a result, the electric power supply to said motors (8, 26) and to said heater element (27) is interrupted. |
