| 摘要 |
<p>The invention relates to a vacuum cleaner (1) having a suction channel and a pressure sensor (13), which is provided in the suction channel and is intended for sensing an actual suction-pressure value, having a suction fan (4), which can be flow-connected to the suction channel, and having a regulating unit (15), which regulates the power of the suction fan (4), in dependence on the pressure measured in the suction channel, to a desired suction-pressure value. According to the invention, it is provided that the vacuum cleaner (1) has means for adjusting the desired suction-pressure value, wherein the pressure sensor (13) is preferably designed as an analogue vacuum load cell (14) and the means for adjusting the desired value is advantageously a potentiometer (17) which interacts with a rotatable handle (16). The invention also relates to a method for operating a vacuum cleaner (1) in which a measurement is taken of the actual suction-pressure value in the suction channel and this value is compared with a desired suction-pressure value and the power of the suction fan (4) is regulated such that the actual suction-pressure value is changed in the direction of its desired suction-pressure value, wherein it is provided according to the invention that the desired suction-pressure value is set in dependence on the suction application required. It is an achievable advantage of this design that convenient operation of the vacuum cleaner (1) is possible even in the case of suction applications for cleaning different kinds of floor, for which the suction power has to meet very different requirements. In particular it is possible to avoid the situation where the suction nozzle (10) sinks down deep into compliant underlying surfaces and jumps over the floor when shifted. Furthermore, the probability of carpets which rest loosely on a smooth underlying surface being shifted by the suction nozzle during cleaning is reduced.</p> |
