US20080034532A1

US20080034532A1 - Off-load reduced input power energy saving low noise air vacuum cleaner

Info

Publication number: US20080034532A1
Application number: US11/502,529
Authority: US
Inventors: Tai-Her Yang
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-02-07
Filing date: 2006-08-11
Publication date: 2008-02-14
Also published as: US20080180049A1; JP2008220812A; EP2103243A1; TW200833287A; CN101243957A

Abstract

An off-load reduced input power energy saving low noise air vacuum cleaner by detecting the operation status of the cleaner to control the size of the electricity inputted to an air pump drive motor, or exercise the control of power delivery or power cut off; normal rated voltage being inputted when the cleaner is in normal working status; or the power outputted to the air pump drive motor being reduced or cut off when the cleaning tool of the cleaner clears away from its working area to render the cleaner in full load operation status as were a blower to increase both noise level and power consumption for reduced noise level and energy saving.

Description

BACKGROUND OF THE INVENTION

(a) Field of the Invention
The present invention is related to an air vacuum cleaner, and more particularly to an off-load reduced input power energy saving low noise air vacuum cleaner, having disposed an electric controlled unit between input source and air pump drive motor of the cleaner to input normal rated voltage when the cleaner is in normal working status; and to either reduce the power outputted to the air pump drive motor or cut off the power source to reduce noise level and save energy when the cleaning tool clears away from the its working area during off-load status.
(b) Description of the Prior Art
The conventional air vacuum cleaner usually idles when the cleaning tool of the cleaner stays away from its working area, that is, the cleaner turns into a full load operation status as it were a blower to result in increased load and the power of the electricity outputted to an air pump drive motor is also increased to produce higher noise level and waste electricity.

SUMMARY OF THE INVENTION

The primary purpose of the present invention is to provide an off-load reduced input power energy saving low noise air vacuum cleaner by detecting the operation status of the cleaner to control the size of the electricity inputted to an air pump drive motor, or exercise the control of power delivery or power cut off; accordingly, normal rated voltage is inputted when the cleaner is in normal working status; or the power outputted to the air pump drive motor is reduced or cut off when the cleaning tool of the cleaner clears away from its working area to render the cleaner in full load operation status as were a blower to increase both noise level and power consumption for achieving low noise level and energy saving purposes.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a circuit block chart of a preferred embodiment of the present invention, wherein an impedance unit connected in series with a power source and an air pump drive motor is provided to control the air pump drive motor.

FIG. 2 is a circuit block chart of another preferred embodiment yet of the present invention, wherein a feedback detector is provided to control the air pump driving motor.

FIG. 3 is the first circuit block chart of the present invention showing that a feedback detector is provided to control an electric controlled unit.

FIG. 4 is the second circuit block chart showing that a feedback detector is provided to control the electric controlled unit.

FIG. 5 is a circuit block chart showing another preferred embodiment yet of the present invention, wherein detection signals from a motor rpm detector are operated to switch the variable windings of the air pump drive motor of the air vacuum cleaner.

FIG. 6 is the third circuit block chart showing that a feedback detector is provided to control the electric controlled unit.

FIG. 7 is a circuit block chart showing another preferred embodiment yet of the present invention, wherein detection signals from a fluid pressure detector of air inlet or air outlet are operated to switch an air pump drive series excitation ring header type motor variable windings of the air vacuum cleaner.

FIG. 8 is the fourth circuit block chart showing that a feedback detector is provided to control the electric controlled unit.

FIG. 9 is a circuit block chart showing another preferred embodiment yet of the present invention, wherein detection signals from a fluid speed detector of air inlet or air outlet are operated to switch an air pump drive series excitation ring header type motor variable windings of the air vacuum cleaner.

FIG. 10 is the first circuit block chart of the present invention showing that a work status detection switch is provided to control the operation of the air pump drive motor of the air vacuum cleaner.

FIG. 11 is a circuit block chart of another preferred embodiment yet of the present invention, wherein a trigger-off dynamo-electric switch is provided to switch the air pump drive series excitation ring header type more variable windings of the air vacuum cleaner.

FIG. 12 is the second circuit block chart of the present invention showing that a work status detection switch is provided to control the operation of the air pump drive motor of the air vacuum cleaner.

FIG. 13 is a circuit block chart of another preferred embodiment yet of the present invention, wherein a non-contact approximate switch detection switch is provided to switch the air pump drive series excitation ring header type more variable windings of the air vacuum cleaner.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

The off-load reduced input power energy saving low noise air vacuum cleaner of the present invention may rely upon AC city power, or DC power, or a source unit of rechargeable batter for its input source; the off-load reduced input power energy saving low noise air vacuum cleaner of the present invention while being provided with the power cord, rechargeable battery source unit, operation switch, and fluid pump for vacuum cleaning, dust collection bag and other mechanism, casing and associate units and equipment related to the vacuuming operation is adapted with an electric controlled unit corresponding to the operation status of the air vacuum cleaner; the modes of interacting control between the electric controlled unit and the source end include:
(1) Active electric controlled unit: an electric controlled unit is comprised of having an impedance unit is connected in series with a power source and an air pump drive motor for executing active control of the power transported to the air pump drive motor of the air vacuum cleaner; and
(2) Passive electric controlled unit: an electric controlled unit is disposed between the input source end and the air pump drive motor of the air vacuum cleaner to function as a passive electric controlled unit; and feedback detector is provided to control the electric controlled unit to execute passive, control of the power transported to the air pump drive motor of the air vacuum cleaner; the air pump drive motor of the air vacuum cleaner is controlled by the electric controlled unit in the following modes:

- Controlling the current transported to the air pump drive motor to maintain as a rated or limit current output; or
- Controlling the voltage transported to the air pump drive motor of the air vacuum cleaner; or
- Controlling the source to supply or cut off the power to the air pump drive motor of the air vacuum cleaner; or
- Controlling to switch the tapping of the magnetic filed winding of the series excitation ring header type of motor if the air pump drive motor of the air vacuum cleaner relates to a series excitation ring header type of motor so to change the rpm of the air pump drive motor of the air vacuum cleaner.

FIG. 1 is a circuit block chart of a preferred embodiment of the present invention, wherein an impedance unit connected in series with a power source and an air pump drive motor is provided to control the air pump drive motor; the preferred embodiment illustrated in FIG. 1 is essentially comprised of:

- An air pump drive motor 102 of the air vacuum cleaner: depending on the source available, an AC or DC series excitation motor, shunt excitation motor, compound excitation motor, or ring header type of brush motors including shunt excitation motor with magnetic field of permanent magnet; or brushless motor of permanent magnet, magnetic resistance motor, cage rotor induction motor, slip ring induction motor that is capable of synchronous or asynchronous operation to drive the air pump of the air vacuum cleaner; and
- An impedance Unit 101: connected in series with the source and the air pump drive motor 102 of the air vacuum cleaner, essentially comprised of a capacitor impedance unit for executing active control; alternatively, the impedance unit 101 for active control unit may be comprised of a resistance device or a positive coefficient resistance device (PTC), or inductive device; or the impedance unit 101 is comprised of any one or multiple of the same or different devices described herein connected in series, parallel, or series-parallel; siad input end of the impedance unit 101 may be related to AC or DC power from city power socket, or to a DC power supplied from a rechargeable battery type of source installation as required so to cause the impedance unit 101 to rise voltage drop between two ends to actively drop the end voltage of the air pump drive motor of the air vacuum motor for reducing the electric power when the load of the air pump drive motor 102 increases and the amperage also increase while the cleaning tool of the air vacuum cleaner clears away from its work area to indicate off-load status.

A feedback detection unit may be further provided to the off-load reduced input power energy saving low noise air vacuum cleaner of the present invention to detect the operation status of the air vacuum cleaner, thus to control the electric controlled unit functioning as a passive control unit for further control of the operation of the air pump drive motor 102 of the air vacuum cleaner; FIG. 2 is a circuit block chart of another preferred embodiment yet of the present invention, wherein a feedback detector is provided to control the air pump driving motor.
The preferred embodiment illustrated in FIG. 2 is essentially comprised of:

- The air pump drive motor 102: a series excitation motor, shunt excitation motor, compound excitation motor, or ring header type of brush motors including shunt excitation motor with magnetic field of permanent magnet driven by AC or DC source; or brushless motor of permanent magnet, magnetic resistance motor, cage rotor induction motor, slip ring induction motor that is capable of synchronous or asynchronous operation may be selected to drive the air pump of the air vacuum cleaner; and
- An electric controlled unit 103: comprised of a electro-mechanical device or solid state electronic device of the prior art to be disposed at where between the source and the air pump drive motor 102 of the air vacuum cleaner for subject to the control by a feedback detection unit 104; accordingly, when the air vacuum cleaner is in its normal work status, the normal rated voltage is inputted; and during the off-load status when the cleaning tool of the air vacuum cleaner clears away from its work area, the power supply to the air pump drive motor 102 is either reduced or cut off for noise reduction and power saving purposes; the input end of the electric controlled unit 103 may be related to AC or DC power from city power socket or a DC source from a rechargeable type of source unit as required; and the output end of the electric controlled unit 103 may be related to AC or DC power to control its output voltage and amperage subject to the specification of the air pump drive motor 102 adapted, and further to control its voltage, amperage and frequency if an AC or DC brushless motor is elected for the air pump driver motor 102 of the air vacuum; and
- A feedback detection unit 104: comprised of a motor load amperage detector 1041 (as illustrated in FIG. 3), or a motor speed detector 1042 (as illustrated in FIGS. 4 and 5), or a fluid pressure detector 1043 (as illustrated in FIGS. 6 and 7), or a fluid speed detector 1044 (as illustrated in FIGS. 8 and 9) to produce detection signals related to the operation status of the air vacuum cleaner, the detection signal may be related to ON-OFF switch signal, analog signal, digital signal or encoding signal to be transmitted to the electric controlled unit 103 where the signal is compared with the settings of the electric controlled unit 103; when the air vacuum is in its normal work status, a normal rated voltage is inputted into the air pump drive motor 102 of the air vacuum cleaner; and when the air vacuum cleaner is in off-load status as the cleaning tool clears away from its work area so to reduce the power supplied to the air pump drive motor 102 of the air vacuum cleaner, thus to reduce the speed of the air pump drive motor 102 of the air vacuum cleaner for achieving reduced noise level and power-saving purposes;
  said electric controlled unit 103 may provide the setup time difference when adapted with a deferred response function to set the response time of the electric controlled unit 103 for the duration of the receiving of feedback signal until the execution of the control of the power supplied to the air pump drive motor 102 of the air vacuum cleaner; the deferred response function relates to an optional function may be provided or not.

The control by the feedback detection unit 104 for the air pump drive motor 102 of the air vacuum cleaner is described below:
FIG. 3 is the first circuit block chart of the present invention showing that a feedback detector is provided to control an electric controlled unit.
In the preferred embodiment of the present invention illustrated in FIG. 3, the feedback detection unit 104 is comprised of the motor load amperage detector 1041 and the load amperage feedback signals are provided for the control of the power transported from the electric controlled unit 103 to the air pump drive motor 102 of the air vacuum cleaner; when the air vacuum is in its normal work status, a normal rated voltage is inputted; and when the air vacuum cleaner is in off-load status as the cleaning tool clears away from its work area so to reduce or cut off the power supplied to the air pump drive motor 102 of the air vacuum cleaner, thus to reduce the noise level and save power.
FIG. 4 is the second circuit block chart showing that a feedback detector is provided to control the electric controlled unit.
The preferred embodiment of the present invention illustrated in FIG. 4, the feedback detection unit 104 is comprised of the motor speed detector 1042 and motor speed feedback signals are produced for the control of the power transported from the electric controlled unit 103 to the air pump drive motor 102 of the air vacuum cleaner; when the air vacuum is in its normal work status, a normal rated voltage is inputted; and when the air vacuum cleaner is in off-load status as the cleaning tool clears away from its work area so to reduce or cut off the power supplied to the air pump drive motor 102 of the air vacuum cleaner, thus to reduce the noise level and save power.
If the air pump drive motor 102 of the air vacuum cleaner relates to a series excitation ring header type of motor, and the air pump drive series excitation ring header type of motor 1021 of the air vacuum cleaner is adapted with the feedback detection unit 104 comprised of the motor speed detector 1042; then as illustrated in FIG. 5, the motor speed detector 1042 directly switches the control of the tapping of the magnetic filed winding from the air pump drive series excitation ring header type of motor 1021 of the air vacuum cleaner or through the control of the electric controlled unit 103 by the motor speed detector 1042; when the air vacuum cleaner is at its normal work status, the power is supplied to a higher speed tapping 411 of the winding of magnetic field of the air pump drive series excitation ring header type of motor of the air vacuum cleaner; and when the air vacuum cleaner is in its off-load status with its cleaning tool clears away from the work area, the power is supplied to a lower speed tapping 412 of the winding of magnetic field of the air pump drive series excitation ring header type of motor of the air vacuum cleaner so to reduce the power transported to the air pump series excitation ring head type of motor 1021 or the power transported thereto is cut off.
FIG. 5 is a circuit block chart showing another preferred embodiment yet of the present invention, wherein detection signals from a motor rpm detector are operated to switch the variable windings of the air pump drive motor of the air vacuum cleaner.
FIG. 6 is the third circuit block chart showing that a feedback detector is provided to control the electric controlled unit.
In the preferred embodiment of the present invention illustrated in FIG. 6, the feedback detection unit 104 is comprised of a fluid pressure detector 1043 disposed at the inlet or outlet of the fluid to produce feedback signals for the control of power transported to the air pump drive motor 102 of the air vacuum cleaner from the electric controlled unit 103; when the air vacuum cleaner is at its normal work status, normal rated voltage is inputted; and when the air vacuum cleaner is in its off-load status with the cleaning tool clears away from the work area, the power supplied to the air pump driver motor 102 of the air vacuum cleaner is reduced or cut off for achieving the purposes of reduced noise level and energy saving.
If the air pump drive motor 102 of the air vacuum cleaner relates to a series excitation ring header type of motor, and the air pump drive series excitation ring header type of motor 1021 of the air vacuum cleaner is adapted with the feedback detection unit 104 comprised of the fluid pressure detector 1043 at the inlet or outlet of the fluid; then as illustrated in FIG. 7, the fluid pressure detector 1043 directly switches the control of the tapping of the magnetic filed winding from the air pump drive series excitation ring header type of motor 1021 of the air vacuum cleaner or through the control of the electric controlled unit 103 by the fluid pressure detector 1043; when the air vacuum cleaner is at its normal work status, the power is supplied to a higher speed tapping 411 of the winding of magnetic field of the air pump drive series excitation ring header type of motor of the air vacuum cleaner; and when the air vacuum cleaner is in its off-load status with its cleaning tool clears away from the work area, the power is supplied to a lower speed tapping 412 of the winding of magnetic field of the air pump drive series excitation ring header type of motor of the air vacuum cleaner so to reduce the power transported to the air pump series excitation ring head type of motor 1021 or the power transported thereto is cut off.
FIG. 7 is a circuit block chart showing another preferred embodiment yet of the present invention, wherein detection signals from a fluid pressure detector of air inlet or air outlet are operated to switch an air pump drive series excitation ring header type motor variable windings of the air vacuum cleaner.
FIG. 8 is the fourth circuit block chart yet showing that a feedback detector is provided to control the electric controlled unit.
In the preferred embodiment of the present invention as illustrated in FIG. 8, the feedback detection unit 104 is comprised of the fluid speed detector 1044 to produce feedback signals for the control of the power transported to the air pump drive motor 102 of the air vacuum cleaner from the electric controlled unit 103; when the air vacuum is in its normal work status, a normal rated voltage is inputted; and when the air vacuum cleaner is in off-load status as the cleaning tool clears away from its work area so to reduce or cut off the power supplied to the air pump drive motor 102 of the air vacuum cleaner, thus to reduce the noise level and save power.
If the air pump drive motor 102 of the air vacuum cleaner relates to a series excitation ring header type of motor, and the air pump drive series excitation ring header type of motor 1021 of the air vacuum cleaner is adapted with the feedback detection unit 104 comprised of the fluid speed detector 1044 at the inlet or outlet of the fluid; then as illustrated in FIG. 9, the fluid speed detector 1044 directly switches the control of the tapping of the magnetic filed winding from the air pump drive series excitation ring header type of motor 1021 of the air vacuum cleaner or through the control of the electric controlled unit 103 by the fluid speed detector 1044; when the air vacuum cleaner is at its normal work status, the power is supplied to a higher speed tapping 411 of the winding of magnetic field of the air pump drive series excitation ring header type of motor of the air vacuum cleaner; and when the air vacuum cleaner is in its off-load status with its cleaning tool clears away from the work area, the power is supplied to a lower speed tapping 412 of the winding of magnetic field of the air pump drive series excitation ring header type of motor of the air vacuum cleaner so to reduce the power transported to the air pump series excitation ring head type of motor 1021 or the power transported thereto is cut off.
FIG. 9 is a circuit block chart showing another preferred embodiment yet of the present invention, wherein detection signals from a fluid speed detector of air inlet or air outlet are operated to switch an air pump drive series excitation ring header type motor variable windings of the air vacuum cleaner.
A work status detection switch, e.g., a contact dynamo-electric switch 1045 or a non-contact approximate switch 1046 is further disposed at where between the fluid suction inlet of the air vacuum cleaner and its work area, the off-load reduced input power energy saving low noise air vacuum cleaner of the present invention to control the voltage transported to the air pump driver motor 102 from the electric controlled unit 103; when the air vacuum cleaner is in its normal work status, the normal rated voltage is inputted to drive the air pump drive motor 102 of the air vacuum cleaner; and when the air vacuum cleaner is in its off-load status with the cleaning tool clears away from the work area, the power transported to the air pump drive motor 102 of the air vacuum cleaner is reduced or cut off for reducing noise level and for energy-saving purposes; or the direct switch is executed by the work status detection switch to lower the speed of the air pump drive motor 102 of the air vacuum cleaner, or to cut off the power transported to the air pump drive motor 102 of the air vacuum cleaner; or the switch is executed by the electric controlled unit 103 to lower the speed of the air pump drive motor 102 of the air vacuum cleaner, or to cut off the power transported to the air pump drive motor 102 of the air vacuum cleaner.
The mode of the control of the operation of the air pump drive motor of the air vacuum cleaner by the work status detection switch is described hereinafter:
FIG. 10 is the first circuit block chart of the present invention showing that a work status detection switch is provided to control the operation of the air pump drive motor of the air vacuum cleaner.
The preferred embodiment of the present invention illustrated in FIG. 10 has a contact dynamo-electric switch 1045 at where between the fluid suction inlet of the air vacuum cleaner and its work area; when the air vacuum is in its normal work status, a normal rated voltage is inputted; and when the air vacuum cleaner is in off-load status as the cleaning tool clears away from its work area so to reduce or cut off the power supplied to the air pump drive motor 102 of the air vacuum cleaner, thus to reduce the noise level and save power.
If the air pump drive motor 102 of the air vacuum cleaner relates to a series excitation ring header type of motor, and the air pump drive series excitation ring header type of motor 1021 of the air vacuum cleaner operates in conjunction with the feedback detection unit 104 comprised of the contact dynamo-electric switch 1045 at where between the fluid suction inlet of the air vacuum cleaner and its work area; then as illustrated in FIG. 11, the contact dynamo-electric switch 1045 directly switches the control of the tapping of the magnetic filed winding from the air pump drive series excitation ring header type of motor 1021 of the air vacuum cleaner or through the control of the electric controlled unit 103 by the contact dynamo-electric switch 1045; when the air vacuum cleaner is at its normal work status, the power is supplied to a higher speed tapping 411 of the winding of magnetic field of the air pump drive series excitation ring header type of motor of the air vacuum cleaner; and when the air vacuum cleaner is in its off-load status with its cleaning tool clears away from the work area, the power is supplied to a lower speed tapping 412 of the winding of magnetic field of the air pump drive series excitation ring header type of motor of the air vacuum cleaner so to reduce the power transported to the air pump series excitation ring head type of motor 1021 or the power transported thereto is cut off.
FIG. 11 is a circuit block chart of another preferred embodiment yet of the present invention, wherein a contact dynamo-electric switch is provided to switch the air pump drive series excitation ring header type more variable windings of the air vacuum cleaner.
FIG. 12 is the second circuit block chart of the present invention showing that a work status detection switch is provided to control the operation of the air pump drive motor of the air vacuum cleaner.
The preferred embodiment of the present invention as illustrated in FIG. 12 has disposed an optical, static, or ultrasonic non-contact approximately switch 1046 at where between the fluid suction inlet of the air vacuum cleaner and its work area; when the air vacuum is in its normal work status, a normal rated voltage is inputted; and when the air vacuum cleaner is in off-load status as the cleaning tool clears away from its work area so to reduce or cut off the power supplied to the air pump drive motor 102 of the air vacuum cleaner, thus to reduce the noise level and save power.
If the air pump drive motor 102 of the air vacuum cleaner relates to a series excitation ring header type of motor, and the air pump drive series excitation ring header type of motor 1021 of the air vacuum cleaner is adapted with the feedback detection unit 104 comprised of the non-contact approximate switch 1046 at where between the fluid suction inlet of the air vacuum cleaner and its work area; then as illustrated in FIG. 13, the non-contact approximate switch 1046 directly switches the control of the tapping of the magnetic filed winding from the air pump drive series excitation ring header type of motor 1021 of the air vacuum cleaner or through the control of the electric controlled unit 103 by the non-contact approximate switch 1046; when the air vacuum cleaner is at its normal work status, the power is supplied to a higher speed tapping 411 of the winding of magnetic field of the air pump drive series excitation ring header type of motor of the air vacuum cleaner; and when the air vacuum cleaner is in its off-load status with its cleaning tool clears away from the work area, the power is supplied to a lower speed tapping 412 of the winding of magnetic field of the air pump drive series excitation ring header type of motor of the air vacuum cleaner so to reduce the power transported to the air pump series excitation ring head type of motor 1021 or the power transported thereto is cut off.
FIG. 13 is a circuit block chart of another preferred embodiment yet of the present invention, wherein a non-contact approximate switch detection switch is provided to switch the air pump drive series excitation ring header type more variable windings of the air vacuum cleaner.
To sum up, an off-load reduced input power energy saving low noise air vacuum cleaner of the present invention achieves reduced noise level and energy saving purposes by reducing the power transported to the air pump driver motor of the air vacuum cleaner when it is in a off-load status and its cleaning tool clears away from its work area by providing an active control unit, a passive control unit and a feedback detection unit at where between the input source and the air pump drive motor of the air vacuum cleaner.

Claims

1. An off-load reduced input power energy saving low noise air vacuum cleaner by detecting the operation status of the cleaner to control the size of the electricity inputted to an air pump drive motor, or exercise the control of power delivery or power cut off; accordingly, normal rated voltage is inputted when the cleaner is in normal working status; or the power outputted to the air pump drive motor is reduced or cut off when the cleaning tool of the cleaner clears away from its working area to render the cleaner in full load operation status as were a blower to increase both noise level and power consumption for achieving low noise level and energy saving purposes; the off-load reduced input power energy saving low noise air vacuum cleaner of the present invention may rely upon AC city power, or DC power, or a source unit of rechargeable batter for its input source; and the off-load reduced input power energy saving low noise air vacuum cleaner of the present invention while being provided with the power cord, rechargeable battery source unit, operation switch, and fluid pump for vacuum cleaning, dust collection bag and other mechanism, casing and associate units and equipment related to the vacuuming operation is adapted with an electric controlled unit corresponding to the operation status of the air vacuum cleaner.

2. The off-load reduced input power energy saving low noise air vacuum cleaner as claimed in claim 1, wherein the modes of interacting control between the electric controlled unit and the source end include an active electric controlled unit comprised of having an impedance unit is connected in series with a power source and an air pump drive motor for executing active control of the power transported to the air pump drive motor of the air vacuum cleaner, and is essentially comprised of:

an air pump drive motor 102 of the air vacuum cleaner: depending on the source available, an AC or DC series excitation motor, shunt excitation motor, compound excitation motor, or ring header type of brush motors including shunt excitation motor with magnetic field of permanent magnet; or brushless motor of permanent magnet, magnetic resistance motor, cage rotor induction motor, slip ring induction motor that is capable of synchronous or asynchronous operation to drive the air pump of the air vacuum cleaner; and

an impedance Unit 101: connected in series with the source and the air pump drive motor 102 of the air vacuum cleaner, essentially comprised of a capacitor impedance unit for executing active control; alternatively, the impedance unit 101 for active control unit may be comprised of a resistance device or a positive coefficient resistance device (PTC), or inductive device; or the impedance unit 101 is comprised of any one or multiple of the same or different devices described herein connected in series, parallel, or series-parallel;

the input end of the impedance unit 101 may be related to AC or DC power from city power socket, or to a DC power supplied from a rechargeable battery type of source installation as required so to cause the impedance unit 101 to rise voltage drop between two ends to actively drop the end voltage of the air pump drive motor of the air vacuum motor for reducing the electric power when the load of the air pump drive motor 102 increases and the amperage also increase while the cleaning tool of the air vacuum cleaner clears away from its work area to indicate off-load status.

3. The off-load reduced input power energy saving low noise air vacuum cleaner as claimed in claim 1, wherein the modes of interacting control between the electric controlled unit and the source end include a passive electric controlled unit disposed between the input source end and the air pump drive motor of the air vacuum cleaner to function as a passive electric controlled unit; and feedback detector is provided to control the electric controlled unit to execute passive control of the power transported to the air pump drive motor of the air vacuum cleaner; the air pump drive motor of the air vacuum cleaner is controlled by the electric controlled unit in the following modes:

controling the current transported to the air pump drive motor to maintain as a rated or limit current output; or

controling the voltage transported to the air pump drive motor of the air vacuum cleaner; or

controling the source to supply or cut off the power to the air pump drive motor of the air vacuum cleaner; or

controling to switch the tapping of the magnetic filed winding of the series excitation ring header type of motor if the air pump drive motor of the air vacuum cleaner relates to a series excitation ring header type of motor so to change the rpm of the air pump drive motor of the air vacuum cleaner; a feedback detection unit may be further provided to the off-load reduced input power energy saving low noise air vacuum cleaner of the present invention to detect the operation status of the air vacuum cleaner, thus to control the electric controlled unit functioning as a passive control unit for further control of the operation of the air pump drive motor 102 of the air vacuum cleaner; and

said air vacuum cleaner is essentially comprised of:

the air pump drive motor 102: a series excitation motor, shunt excitation motor, compound excitation motor, or ring header type of brush motors including shunt excitation motor with magnetic field of permanent magnet driven by AC or DC source; or brushless motor of permanent magnet, magnetic resistance motor, cage rotor induction motor, slip ring induction motor that is capable of synchronous or asynchronous operation may be selected to drive the air pump of the air vacuum cleaner; and

an electric controlled unit 103: comprised of a electro-mechanical device or solid state electronic device of the prior art to be disposed at where between the source and the air pump drive motor 102 of the air vacuum cleaner for subject to the control by a feedback detection unit 104; accordingly, when the air vacuum cleaner is in its normal work status, the normal rated voltage is inputted; and during the off-load status when the cleaning tool of the air vacuum cleaner clears away from its work area, the power supply to the air pump drive motor 102 is either reduced or cut off for noise reduction and power saving purposes; the input end of the electric controlled unit 103 may be related to AC or DC power from city power socket or a DC source from a rechargeable type of source unit as required; and the output end of the electric controlled unit 103 may be related to AC or DC power to control its output voltage and amperage subject to the specification of the air pump drive motor 102 adapted, and further to control its voltage, amperage and frequency if an AC or DC brushless motor is elected for the air pump driver motor 102 of the air vacuum; and

a feedback detection unit 104: comprised of a motor load amperage detector 1041, or a motor speed detector 1042, or a fluid pressure detector 1043, or a fluid speed detector 1044 to produce detection signals related to the operation status of the air vacuum cleaner, the detection signal may be related to ON-OFF switch signal, analog signal, digital signal or encoding signal to be transmitted to the electric controlled unit 103 where the signal is compared with the settings of the electric controlled unit 103; when the air vacuum is in its normal work status, a normal rated voltage is inputted into the air pump drive motor 102 of the air vacuum cleaner; and when the air vacuum cleaner is in off-load status as the cleaning tool clears away from its work area so to reduce the power supplied to the air pump drive motor 102 of the air vacuum cleaner, thus to reduce the speed of the air pump drive motor 102 of the air vacuum cleaner for achieving reduced noise level and power-saving purposes; the electric controlled unit 103 may provide the setup time difference when adapted with a deferred response function to set the response time of the electric controlled unit 103 for the duration of the receiving of feedback signal until the execution of the control of the power supplied to the air pump drive motor 102 of the air vacuum cleaner; the deferred response function relates to an optional function may be provided or not.

4. The off-load reduced input power energy saving low noise air vacuum cleaner as claimed in claim 3, wherein a feedback detection unit 104 is comprised of the motor load amperage detector 1041; the load amperage feedback signals are provided for the control of the power transported from the electric controlled unit 103 to the air pump drive motor 102 of the air vacuum cleaner; when the air vacuum is in its normal work status, a normal rated voltage is inputted; and when the air vacuum cleaner is in off-load status as the cleaning tool clears away from its work area so to reduce or cut off the power supplied to the air pump drive motor 102 of the air vacuum cleaner, thus to reduce the noise level and save power.

5. The off-load reduced input power energy saving low noise air vacuum cleaner as claimed in claim 3, wherein a feedback detection unit 104 is comprised of a motor speed detector 1042; the motor speed feedback signals are provided for the control of the power transported from the electric controlled unit 103 to the air pump drive motor 102 of the air vacuum cleaner; when the air vacuum is in its normal work status, a normal rated voltage is inputted; and when the air vacuum cleaner is in off-load status as the cleaning tool clears away from its work area so to reduce or cut off the power supplied to the air pump drive motor 102 of the air vacuum cleaner, thus to reduce the noise level and save power.

6. The off-load reduced input power energy saving low noise air vacuum cleaner as claimed in claim 5, wherein the air pump drive motor 102 of the air vacuum cleaner relates to a series excitation ring header type of motor, and the air pump drive series excitation ring header type of motor 1021 of the air vacuum cleaner is adapted with the feedback detection unit 104 comprised of the motor speed detector 1042 to directly switch the control of the tapping of the magnetic filed winding from the air pump drive series excitation ring header type of motor 1021 of the air vacuum cleaner or through the control of the electric controlled unit 103 by the motor speed detector 1042; when the air vacuum cleaner is at its normal work status, the power is supplied to a higher speed tapping 411 of the winding of magnetic field of the air pump drive series excitation ring header type of motor of the air vacuum cleaner; and when the air vacuum cleaner is in its off-load status with its cleaning tool clears away from the work area, the power is supplied to a lower speed tapping 412 of the winding of magnetic field of the air pump drive series excitation ring header type of motor of the air vacuum cleaner so to reduce the power transported to the air pump series excitation ring head type of motor 1021 or the power transported thereto is cut off.

7. The off-load reduced input power energy saving low noise air vacuum cleaner as claimed in claim 3, wherein a feedback detection unit 104 is comprised of a fluid pressure detector 1043 disposed at the inlet or outlet of the fluid to produce feedback signals for the control of power transported to the air pump drive motor 102 of the air vacuum cleaner from the electric controlled unit 103; when the air vacuum cleaner is at its normal work status, normal rated voltage is inputted; and when the air vacuum cleaner is in its off-load status with the cleaning tool clears away from the work area, the power supplied to the air pump driver motor 102 of the air vacuum cleaner is reduced or cut off for achieving the purposes of reduced noise level and energy saving.

8. The off-load reduced input power energy saving low noise air vacuum cleaner as claimed in claim 7, wherein the air pump drive motor 102 of the air vacuum cleaner relates to a series excitation ring header type of motor, and the air pump drive series excitation ring header type of motor 1021 of the air vacuum cleaner is adapted with the feedback detection unit 104 comprised of the fluid pressure detector 1043 at the inlet or outlet of the fluid to directly switch the control of the tapping of the magnetic filed winding from the air pump drive series excitation ring header type of motor 1021 of the air vacuum cleaner or through the control of the electric controlled unit 103 by the fluid pressure detector 1043; when the air vacuum cleaner is at its normal work status, the power is supplied to a higher speed tapping 411 of the winding of magnetic field of the air pump drive series excitation ring header type of motor of the air vacuum cleaner; and when the air vacuum cleaner is in its off-load status with its cleaning tool clears away from the work area, the power is supplied to a lower speed tapping 412 of the winding of magnetic field of the air pump drive series excitation ring header type of motor of the air vacuum cleaner so to reduce the power transported to the air pump series excitation ring head type of motor 1021 or the power transported thereto is cut off.

9. The off-load reduced input power energy saving low noise air vacuum cleaner as claimed in claim 3, wherein a feedback detection unit 104 is comprised of the fluid speed detector 1044 to produce feedback signals for the control of the power transported to the air pump drive motor 102 of the air vacuum cleaner from the electric controlled unit 103; when the air vacuum is in its normal work status, a normal rated voltage is inputted; and when the air vacuum cleaner is in off-load status as the cleaning tool clears away from its work area so to reduce or cut off the power supplied to the air pump drive motor 102 of the air vacuum cleaner, thus to reduce the noise level and save power.

10. The off-load reduced input power energy saving low noise air vacuum cleaner as claimed in claim 9, wherein the air pump drive motor 102 of the air vacuum cleaner relates to a series excitation ring header type of motor, and the air pump drive series excitation ring header type of motor 1021 of the air vacuum cleaner is adapted with the feedback detection unit 104 comprised of the fluid speed detector 1044 at the inlet or outlet of the fluid to directly switch the control of the tapping of the magnetic filed winding from the air pump drive series excitation ring header type of motor 1021 of the air vacuum cleaner or through the control of the electric controlled unit 103 by the fluid speed detector 1044; when the air vacuum cleaner is at its normal work status, the power is supplied to a higher speed tapping 411 of the winding of magnetic field of the air pump drive series excitation ring header type of motor of the air vacuum cleaner; and when the air vacuum cleaner is in its off-load status with its cleaning tool clears away from the work area, the power is supplied to a lower speed tapping 412 of the winding of magnetic field of the air pump drive series excitation ring header type of motor of the air vacuum cleaner so to reduce the power transported to the air pump series excitation ring head type of motor 1021 or the power transported thereto is cut off.

11. The off-load reduced input power energy saving low noise air vacuum cleaner as claimed in claim 1, wherein a work status detection switch e.g. a contact dynamo-electric switch 1045 or a non-contact approximate switch 1046 is further disposed at where between the fluid suction inlet of the air vacuum cleaner and its work area, the off-load reduced input power energy saving low noise air vacuum cleaner of the present invention to control the voltage transported to the air pump driver motor 102 from the electric controlled unit 103; when the air vacuum cleaner is in its normal work status, the normal rated voltage is inputted to drive the air pump drive motor 102 of the air vacuum cleaner; and when the air vacuum cleaner is in its off-load status with the cleaning tool clears away from the work area, the power transported to the air pump drive motor 102 of the air vacuum cleaner is reduced or cut off for reducing noise level and for energy-saving purposes; or the direct switch is executed by the work status detection switch to lower the speed of the air pump drive motor 102 of the air vacuum cleaner, or to cut off the power transported to the air pump drive motor 102 of the air vacuum cleaner; or the switch is executed by the electric controlled unit 103 to lower the speed of the air pump drive motor 102 of the air vacuum cleaner, or to cut off the power transported to the air pump drive motor 102 of the air vacuum cleaner.

12. The off-load reduced input power energy saving low noise air vacuum cleaner as claimed in claim 11, wherein a contact dynamo-electric switch 1045 is disposed at where between the fluid suction inlet of the air vacuum cleaner and its work area; and when the air vacuum is in its normal work status, a normal rated voltage is inputted; and when the air vacuum cleaner is in off-load status as the cleaning tool clears away from its work area so to reduce or cut off the power supplied to the air pump drive motor 102 of the air vacuum cleaner, thus to reduce the noise level and save power.

13. The off-load reduced input power energy saving low noise air vacuum cleaner as claimed in claim 12, wherein the air pump drive motor 102 of the air vacuum cleaner relates to a series excitation ring header type of motor, and the air pump drive series excitation ring header type of motor 1021 of the air vacuum cleaner operates in conjunction with the feedback detection unit 104 comprised of the contact dynamo-electric switch 1045 at where between the fluid suction inlet of the air vacuum cleaner and its work area to directly switch the control of the tapping of the magnetic filed winding from the air pump drive series excitation ring header type of motor 1021 of the air vacuum cleaner or through the control of the electric controlled unit 103 by the contact dynamo-electric switch 1045; when the air vacuum cleaner is at its normal work status, the power is supplied to a higher speed tapping 411 of the winding of magnetic field of the air pump drive series excitation ring header type of motor of the air vacuum cleaner; and when the air vacuum cleaner is in its off-load status with its cleaning tool clears away from the work area, the power is supplied to a lower speed tapping 412 of the winding of magnetic field of the air pump drive series excitation ring header type of motor of the air vacuum cleaner so to reduce the power transported to the air pump series excitation ring head type of motor 1021 or the power transported thereto is cut off.

14. The off-load reduced input power energy saving low noise air vacuum cleaner as claimed in claim 11, wherein an optical, static, or ultrasonic non-contact approximately switch 1046 is disposed at where between the fluid suction inlet of the air vacuum cleaner and its work area; when the air vacuum is in its normal work status, a normal rated voltage is inputted; and when the air vacuum cleaner is in off-load status as the cleaning tool clears away from its work area so to reduce or cut off the power supplied to the air pump drive motor 102 of the air vacuum cleaner, thus to reduce the noise level and save power.

15. The off-load reduced input power energy saving low noise air vacuum cleaner as claimed in claim 14, wherein the air pump drive motor 102 of the air vacuum cleaner relates to a series excitation ring header type of motor, and the air pump drive series excitation ring header type of motor 1021 of the air vacuum cleaner is adapted with the feedback detection unit 104 comprised of the non-contact approximate switch 1046 at where between the fluid suction inlet of the air vacuum cleaner and its work area to directly switch the control of the tapping of the magnetic filed winding from the air pump drive series excitation ring header type of motor 1021 of the air vacuum cleaner or through the control of the electric controlled unit 103 by the non-contact approximate switch 1046; when the air vacuum cleaner is at its normal work status, the power is supplied to a higher speed tapping 411 of the winding of magnetic field of the air pump drive series excitation ring header type of motor of the air vacuum cleaner; and when the air vacuum cleaner is in its off-load status with its cleaning tool clears away from the work area, the power is supplied to a lower speed tapping 412 of the winding of magnetic field of the air pump drive series excitation ring header type of motor of the air vacuum cleaner so to reduce the power transported to the air pump series excitation ring head type of motor 1021 or the power transported thereto is cut off.