VACUUM CLEANER HAVING A POWER INDICATOR FOR DETERMINING A THRESHOLD VALUE OF THE SUCTION POWER, POWER INDICATOR FOR USE IN SUCH A VACUUM CLEANER, USE OF A SNAP SPRING IN SUCH A VACUUM CLEANER AND METHOD FOR DETERMINING A THRESHOLD VALUE OF THE SUCTIO

摘要

Vacuum cleaner comprising a suction passage (4, 40) that communicates with a suction nozzle, a generator that generates a suction power for transporting a medium from the suction nozzle through the suction passage, and a power indicator (1, 10) for determining a threshold value of the suction power. The power indicator comprises a disc shaped snap spring (20) that has at least one hole (3, 30) and that is arranged to reversibly snap between two positions once a sufficient force (F) is exerted on the snap spring. In a working condition, the power indicator is accommodated within the suction passage so as to snap once the suction power in the passage exceeds a threshold value. Method for determining a threshold value of a suction power of a vacuum cleaner.