STRUCTURE FOR AUTOMATICALLY ADJUSTING PRESSURE-MEASURING PORT OF BLOWER

摘要

Disclosed is a structure for automatically adjusting a pressure-measuring port of a blower. The structure comprises a volute (1) and the pressure-measuring port (2), wherein a cavity (11) accommodating a wind wheel is provided in the middle of the volute (1), a pressure-measuring through hole (21) is provided in the centre of the pressure-measuring port (2), the pressure-measuring port (2) is mounted in a volute through hole (12) provided on the volute (1) and can be moved axially along the volute through hole (12), and the pressure-measuring through hole (21) is in communication with the cavity (11). By changing the position of the pressure-measuring port, the structure changes the negative pressure output value of the blower, thereby changing the performance of the blower. The structure is simple and of low costs, and can be used universally, being suitable for various blowers.