Suction blower

Abstract

The invention discloses a suction blower capable of adjusting the wind speed. The suction blower comprises a blower body and an outer pipe, wherein an air-out hole and an air outlet are formed in the outer pipe; a rotating inner pipe of which the axis direction is the same to that of the outer pipe is arranged in the air outlet, the rotating inner pipe can rotate around the axis of the outer pipe, and the cross-sectional area of air outflowed from the air outlet can be changed in the rotating process; an adjusting element is arranged on the outer pipe in a sleeving manner, and used for adjusting the air-out hole to be opened or closed and adjusting the cross-sectional area of air outflowed from the air outlet. The air flow quantity and flow speed are adjusted by the rotating inner pipe and the adjusting element, the suction blower has three speed stages, namely, a low-speed stage, a medium-speed stage and a high-speed stage, different choices can be provided for users, and particularly sundries in narrow and damp environments can be effectively removed by the suction blower, particularly, at the high-speed stage.

Description

technical field [0001] The invention relates to a blower, in particular to a blower capable of changing blowing speed. Background technique [0002] The blower is widely used in the fields of household electric tools and garden electric tools. Taking the field of garden electric tools as an example, when the blower is in the blowing state, it can effectively blow away light debris such as fallen leaves and reduce the user burden. However, in some humid and narrow areas, debris such as fallen leaves will not be blown away by the wind at ordinary speeds, so it is necessary to increase the wind speed of the blower in the blowing state. Some of the blower and suction machines in the prior art realize the increase and decrease of wind speed by changing the speed of the motor, but this is a waste of time and power; in fact, when the speed of the blower and suction machine motor is constant and the power is not cut The easiest way to improve the blowing speed is to reduce the cro...

AI Technical Summary

Problems solved by technology

Some of the blower and suction machines in the prior art realize the increase and decrease of wind speed by changing the speed of the motor, but this is a waste of time and power; in fact, when the speed of the blower and suction machine motor is constant and the power is not cut The easiest way to improve the blowing speed is to reduce the cross-sectional area of ​​the blowing port, so that the airflow density passing through the unit area will increase, and the wind speed will also increase thereupon. Another part of the blowing and sucking machine in the prior art utilizes this to give The blower is equipped with multiple detachable and installable outer tubes of different calibers, but due to too many accessories, it is not convenient for the blower that is often used outdoors

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