Rechargeable vacuum cleaner

Abstract

A rechargeable vacuum cleaner comprises a main body, at least two sets of rechargeable batteries for driving a motor in the main body and a power-supply control unit. The power-supply control unit is coupled with the sets of rechargeable batteries and the motor for affecting a set of rechargeable batteries of higher voltage to supply power to the motor and for preventing the set of rechargeable batteries charging another set of rechargeable batteries of lower voltage. The power-supply control unit includes a silicon assembly (being a bridge rectifier) or a diode. The rechargeable vacuum cleaner can be of two piece type (with a detachable unit) or a two piece type. Therefore, the rechargeable vacuum cleaner can lengthen the operating time and prevent damaging the batteries.

Description

BACKGROUND OF THE INVENTION [0001] (a) Field of the Invention [0002] The present invention relates to rechargeable vacuum cleaners, more particularly to a rechargeable vacuum cleaner utilizing the technique of voltage dividing to lengthen the operating time and the lifespan of its batteries. [0003] (b) Description of the Prior Art [0004] The majority of the rechargeable vacuum cleaner of prior art use a set of rechargeable batteries connected in parallel to supply a motor, such as four 12V 1300 mA batteries with an output voltage of 4.8V. The motor is then used to provide an effect of vacuum cleaning. As shown in FIG. 1, the electric circuit of a rechargeable vacuum cleaner of the prior art comprises a charging circuit and a power supplying circuit attached with a set of rechargeable batteries for powering a motor. The power supplying circuit further includes a switch for controlling charging and power-supplying of the set of rechargeable batteries. The operating time of the vacuum ...

AI Technical Summary

Benefits of technology

[0006] Accordingly, the primary objective of the present invention is to provide a rechargeable vacuum cleaner utilizing the technique of voltage dividing realized by disposing a silicon assembly or diode between two sets of rechargeable batteries to prevent the sets of rechargeable batteries from mutual charging due to electricity capacity imbalance and therefore to lengthen the lifespan of the sets of rechargeable batteries.

[0007] The secondary objective of the present invention is to provide a rechargeable vacuum cleaner that utilizes the technique of voltage dividing over at least two sets of rechargeable batteries for lengthening the operating time of the rechargeable vacuum cleaner. The technique will not change the output voltage to the motor but can properly control the processed of charging and discharging for preventing damaging the sets of rechargeable batteries.

[0013] The present invention has the advantages as follows. The installation of more than one set of rechargeable batteries using the technique of voltage dividing can lengthen the operating time of the rechargeable vacuum cleaner. Further, the sets of rechargeable batteries will be so managed that all of them can supply power to the motor, even their respective electricity capacities are different, and that mutual charging among the sets of rechargeable batteries due to the capacity imbalance will be avoided, therefore enhancing the durability of the batteries.

Problems solved by technology

Therefore, a rechargeable vacuum cleaner with only one set of rechargeable batteries has a short operating time, and continuously charging the set of rechargeable batteries is necessary for continuously using the rechargeable vacuum cleaner.

However, this design cannot solve the problem of short lifespan of a set of rechargeable batteries substantially.

The problem of short lifespan of sets of rechargeable batteries occurs especially in rechargeable vacuum cleaners having more than one set of rechargeable batteries.

This effect will gradually damage the batteries and therefore shorten the lifespan of the rechargeable vacuum cleaner.

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