Adjustable circuit for personal electric cleaning and care appliances

Abstract

An adjustable circuit for a personal electric cleaning and nursing appliance, the cleaning and nursing appliance includes a power supply part and a driver, the power supply part includes an H-bridge circuit, and the driver includes a transducer, a driving coil and a driving coil iron core arranged in the driving coil , the transducer is provided with elastic parts and permanent magnets, and the drive shaft of the transducer is equipped with a cleaning element. When the driving coil flows through an alternating current, the cleaning element and the transducer resonate reciprocatingly under the action of the electromagnetic force of the driving coil Rotational movement. The adjustable circuit includes a microchip processor and the H-bridge drive circuit. By connecting the capacitor bank and the drive coil in series with the capacitor bank at the load end of the H-bridge circuit, at least part of the capacitors in the capacitor bank are connected in series with the drive coil or connected with the drive coil. The driving coil is disconnected to control the capacitance of the connected capacitor, so that the current flowing through the driving coil can be controllably limited to a certain value, so that the movement amplitude of the cleaning element can be controlled without additional electromagnetic interference.

Description

technical field [0001] The present invention relates to an adjustable circuit for personal electric cleaning and nursing appliances, more specifically, to a circuit with adjustable electric efficiency and amplitude for personal electric cleaning and nursing appliances. Background technique [0002] In personal electric cleaning and care appliances (hereinafter referred to as cleaning and care appliances), a resonant drive system is often used to drive the cleaning and care appliances to rotate. As described in another patent application PCT / CN2015 / 071696 of the applicant, the cleaning and care appliance includes a handle with a handle housing, and the inside of the handle housing is equipped with a power supply part for supplying power to various parts of the cleaning and care appliance to control cleaning. Various working modes of the nursing appliance, a control part for opening or closing the cleaning and nursing appliance, a triggering part for starting or closing the op...

AI Technical Summary

Problems solved by technology

However, this method increases the current of the driving coil, which increases the overall power consumption of the cleaning and care appliance and reduces the output mechanical power.

In another prior art, the average current flowing through the driving coil is reduced by controlling the time that the current flows through the driving coil, for example, the current in the driving coil is frequently switched on and off by using PWM (pulse width modulation) mode, the smaller The average current of the drive coil can reduce the movement range of the cleaning element. Although this method can obtain a smaller movement range of the cleaning element while reducing the overall power consumption, frequent switching of the current in the drive coil may cause electromagnetic interference and cause pollution. surroundings

Of course, this electromagnetic interference can be shielded by other means, but it will increase the cost

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