Abstract: A steam generator includes a housing, a heating unit, an electrothermal unit and a one-way valve. The housing has a chamber and a water inlet. The heating unit includes a heating portion extending into the chamber. The heating portion has a first spiral channel thereon. One end of the heating portion is formed with a vaporization room and a steam outlet. The vaporization room has a second spiral channel therein to extend the time that the water and the wet steam pass through the heating unit so as to provide a complete heating and vaporizing function. Besides, by the one-way valve coupled to the water inlet, the steam generator of the present invention is simple in structure and cost-effective, providing an automatic water supply and re-heating function.

Abstract: For use in an electric home appliance, such as steam mop or steam vacuum cleaner, a steam generator is disclosed to include an electric heater, a fluid storage tank connected to the electric heater, a pressure valve installed in the fluid storage tank and an air compression unit operable by hand, electricity or steam to pump air into the fluid storage tank to force fluid out of the fluid storage tank to the electric heater for heating into steam for application.

Abstract: A steam generator includes a housing, a heating unit, an electrothermal unit and a one-way valve. The housing has a chamber and a water inlet. The heating unit includes a heating portion extending into the chamber. The heating portion has a first spiral channel thereon. One end of the heating portion is formed with a vaporization room and a steam outlet. The vaporization room has a second spiral channel therein to extend the time that the water and the wet steam pass through the heating unit so as to provide a complete heating and vaporizing function. Besides, by the one-way valve coupled to the water inlet, the steam generator of the present invention is simple in structure and cost-effective, providing an automatic water supply and re-heating function.

Abstract: A floor sweeper includes a sweeper head defining therein a dust chamber, sweeping rollers mounted around all sides of the sweeper head and powered by a motor to direct dust into the dust chamber, and electric fans mounted in the sweeper head for inducing currents of air toward the inside of the sweeper head to offset outward flowing currents induced during the rotation of the sweeping rollers so as to prevent outside dust from flying about to cause secondary contamination.

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.

Abstract: A hand vacuum cleaner with a dry/wet switcher that operates in dry or wet mode without any external attachment is comprised of an elevation deck adapted with a water curette provided at the nozzle of the dust receiver; the knob being turned to control the ascending or descending of the elevation deck to change the openness of the nozzle; larger openness of the nozzle allowing dry operation mode and smaller openness to fully expose the water curette thus to operate in wet mode at the highest vacuuming velocity.

Abstract: Accordingly, the primary object of the present invention is to provide a waste recycle vacuum cleaner for generating power which comprises a flow guide seat, a flow guide tube, at least one blade set and at least one driving device. By above components, exhausted waste gas from the vacuum cleaner is recycled through the flow guide seat to be as a wind power. The wind passes through the outlet to pass through the flow guide tube. The blade set serves to convert the wind power to the dynamic power for driving at least one driving device. Thereby, waste gas from the vacuum cleaner is recycled as a dynamic power to drive a driving device and to dissipate the heat of the motor.

Abstract: A hand vacuum cleaner allowing adjustment of its nozzle width and provided with a built-in hose; one either side or both sides of a primary nozzle being provided with one set or two sets of expanded nozzle, each expanded nozzle being comprised of a slider and a connector inserted to each other, the nozzle getting wider as both of the slider and the connector outwardly stretched to enlarge the vacuum cleaning scope, the flexible hose being compressed and stored in an inner sleeve in a dust receiver, and ejected to extend its length in the use.

Abstract: Accordingly, the primary object of the present invention is to provide a waste recycle vacuum cleaner for generating power which comprises a flow guide seat, a flow guide tube, at least one blade set and at least one driving device. By above components, exhausted waste gas from the vacuum cleaner is recycled through the flow guide seat to be as a wind power. The wind passes through the outlet to pass through the flow guide tube. The blade set serves to convert the wind power to the dynamic power for driving at least one driving device. Thereby, waste gas from the vacuum cleaner is recycled as a dynamic power to drive a driving device and to dissipate the heat of the motor.