Leaf blower with lithium battery multivibrator superposition voltage unit circuit multi-tube noise elimination function

Abstract

A leaf blower with a lithium battery multivibrator superposition voltage unit circuit multi-tube noise elimination function comprises a battery state display unit. Four LEDs serve as display devices,through state combination, the voltage, the electric quantity and the temperature of a battery and whether the battery is abnormal or not can be correctly displayed, and therefore the working state ofthe battery can be judged. The charging voltage supplied to the lithium battery is not traditional constant-voltage constant-current direct current charging voltage but the multivibrator superposition voltage, formed by mixing the rectified voltage of a lithium battery charging circuit with the pulse voltage led from a free running multivibrator originally used for an electric discharge machiningmachine tool, generated by a multivibrator superposition voltage unit circuit, and the lithium battery is charged through holes, storing electric charges, in the lithium battery in a multi-point acupuncturing mode. The mean value of the pulse voltage led from the free running multivibrator is 82 V, the pulse frequency of the pulse voltage is 82 kHz, and twice the result can be obtained with halfthe effort.

Description

technical field [0001] The invention relates to a portable electric tool for blowing and sucking leaves in places such as flower beds, courtyards, parks and roadsides, especially an improvement of a low-vibration leaf blowing and sucking machine, and materials for noise reduction and vibration reduction inside and outside the blowing and sucking machine And honeycomb, and on the basis of the low-vibration leaf blower with safety door of equal logarithmic spiral at the pressure angle and the leaf blower with combined motor front sound absorption and noise reduction and rear air duct multi-tube noise reduction, improve The utility model relates to a leaf blower with a lithium battery multi-harmonic superimposed voltage unit circuit and a multi-tube noise-elimination machine. Background technique [0002] Blowers are widely used to clean leaves in the manner chosen by people's preferences. Some pedestrians like and are used to using the blower, especially when they encounter c...

AI Technical Summary

Problems solved by technology

The stator part of the outer rotor motor of the ordinary brushless motor that is usually used for blower or leaf blower is outside the motor. The stator is large and the lower slot of the stator winding is large, which does not meet the expectation of light weight and high output; especially its The rotor part with windings has to protrude a very long and thin motor output shaft, and the connection between the motor and the impeller fan can only be realized on the long extension line outside the axial direction of the motor, which causes a fatal problem Problem, the output shaft between the motor and the impeller fan forms a material mechanics cantilever beam structure, the length of the output shaft between the motor end and the center of the impeller fan is the moment arm, the radial centrifugal force on the impeller fan This force arm and the bias force form a large harmful bias moment, which consumes a large amount of motor output, unnecessarily increases the deflection of the shaft and the moment of inertia, and restricts the high-speed strength of the blower or leaf blower. out of the wind

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