吸尘器的技术与历史毕业设计外文翻译.docx

The vacuum cleaner technology and historyVacuum cleaner - classification Vacuum cleaner species more, according to the structure points are mainly：1, vertical：a bucket or square round the majority，points on, under two parts，the upper part． is powered with motor，the lower for dust collection box．2, horizontal: rectangular or models shape，have two parts，front before for dust collection box，rear part for the motor．3 and portable，it usually has four kinds of form - shoulder type：smaller，when using back on his shoulders，smaller power；Pole type： shape like rod，handles，and on the top is for suction nozzle below，smaller power；Portable:smaller，which can be directly used in hand grip, smaller power；Mini type：multi-purpose battery-powered，smaller，more for clean clothes, instruments，smaller power．According to the drive motors to pointsvacuum cleaner and can be divided into the following categories: ac vacuum cleaners, dc cleaner and ac/dc amphibious vacuum cleaner．Vacuum cleaner - working principle Cleaner mainly by up dust，vacuuming，blow 3 parts，generally includes string-excited motor, centrifugal blower KSF, blow device (bags) and vacuuming accessories. KSF string-excited motor speed up more than 20000r/min (mini vacuum cleaner analyzed．combined by micro，rated voltage dc machines for 3 ~ 6V). Blow is usually adopts mesh， flannelette or filter materials. General cleaner power for 400 ~ 1000W or higher，portable vacuum cleaner power generally lower than 250W．Cleaner principle of work is as follows： motor high-speed drive their impeller rotation, make air high-speed eduction, and the air blower front-end vacuuming cottrell constantly supply，make aspiration to fan cottrell，thus produced with outside the instantaneous vacuum forming negative pressure differential pressure，on the pressure difference，under the action of inhaled air，the dust scurf，ejecting purity is filtered air cleaner air．The greater the air pressure difference，the greater the greater ability，aspiration．A vacuum cle