In view of the defects of thet rumpet table absorber and semicylinder table absorber widely used in the present chemistry laboratories,a research of a table absorber has been conducted and a new type of fine absorber has been designed.

Analysis and experiment of blower fans in a vacuum cleaner;

Developed a high-powder,efficient and practical air powder vacuum cleaner after studing its working principle in order to suck up air powder,the vacuum cleaner is vevy practical.

After analyzing the structure and work principle of the U36 vacuum cleaner finding out the influence factors of inhelation efficiency,the improving measures and design aiming at every factor were put forward.

This paper particularly discussed the manufacture technology of the needle-punched composite nonwovens used in cleaner filter element,and this product with other needle-punched nonwoven filter material was compared,the result indicated this produce is better.

According to the demands for the robot-cleaner to detect a real field,the software is designed based on gyro,ultrasonic sensors,approximate probes,dual CPU structure combined with DSP and MPU.

The technological features of the elbow union joint of dirt collector were analyzed.