JPH02243125A - Vacuum cleaner - Google Patents

Abstract

PURPOSE:To automatically start and stop a cleaner without operating a switch, by a method wherein a fan motor is brought in operation by a driving circuit on receipt of signals from a sensor when a suction part moves on a surface to be cleaned, and the fan motor is stopped after a specified time period is counted on receipt of signals from the sensor when the suction part stops moving on the surface to be cleaned. CONSTITUTION:When a power brush 1 is moved, wheels 5a - 5d is revolved, which causes a revolving sensor 6 to output signals and a control signal generating circuit 13 to output driving signals to a power source control element 12. The power source control element 12 applies the voltage of a power source E on a motor 8 so that the motor rotates driving a rotary brush 7. Next, when the power brush 1 is stopped on a surface to be cleaned, causing the wheels 5a - 5d to stop revolving, so that the output from the revolving sensor ceases. When the output from the revolving sensor ceases, a built-in timer of the control signal generating circuit 13 counts a specified time period (5 - 15sec, for instance), the control signal generating circuit 13 stops sending the driving signals to the power source control element 12.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application This invention relates to a vacuum cleaner mainly used in ordinary households.

(B) Conventional technology Conventionally, in this type of vacuum cleaner, the fan motor continues to rotate even while performing tasks other than actual cleaning, such as moving furniture or moving the vacuum cleaner. They are often left unattended, resulting in wasted power consumption.

Therefore, a vacuum cleaner has been proposed in which a fan motor is driven by detecting that the suction portion of the vacuum cleaner comes into contact with a surface to be cleaned (see Japanese Patent Laid-Open No. 57-89836).

(c) Problems to be solved by the invention In a vacuum cleaner, the contact between the suction part and the cleaning surface is detected and the fan motor is rotated.If the suction part is not moved, the same spot on the cleaning surface is continuous. Do it and be attracted. Therefore, if the cleaning surface is made of hair or soft fibers such as carpet U, there is a problem in that it may be worn or damaged.

This invention was made taking these circumstances into consideration, so
The fan motor is activated only when the suction part contacts the cleaning surface and moves over the cleaning surface, and the fan motor is automatically stopped when the suction part does not move (this prevents damage to the cleaning surface). We offer vacuum cleaners without vacuum cleaners.

(d) Means for Solving the Problems This invention provides a vacuum cleaner equipped with a fan motor that moves a suction part over a surface to be cleaned and sucks dust from the surface to be cleaned through a suction part. A sensor that detects movement and stoppage with respect to the cleaning surface, a drive circuit that receives the output of the sensor when the suction part moves with respect to the cleaning surface and drives the fan motor, and a drive circuit that receives the output of the sensor when the suction part moves with respect to the cleaning surface and drives the fan motor. This vacuum cleaner is characterized by comprising a timer that receives the output, measures a predetermined time, and outputs the output to the drive circuit after the measurement to stop the fan motor.

(e) Operation When the suction part is moved above the cleaning surface, the drive circuit receives the output of the sensor and drives the fan motor. The fan motor sucks dust from the cleaning surface through the suction section. When the suction part or the surface to be cleaned stops, the timer measures a predetermined time, and after the time has elapsed, outputs an output to the drive circuit to stop the fan motor. Therefore, the suction unit does not continuously suck at the same location on the surface to be cleaned, and the surface to be cleaned is not damaged.

(f) Examples Hereinafter, the present invention will be described in detail based on examples shown in the drawings. This invention is not limited by this.

FIG. 1 is a perspective view showing an embodiment of the present invention, in which 1 is a power brush, 2 is an extension pipe, 3 is a hose, and 4 is a vacuum cleaner main body. Built-in control device.

FIG. 2 is an explanatory diagram of the internal configuration of the power brush shown in FIG. 7 is a rotating brush, 8 is a motor for driving the rotating brush, 9 is a belt connecting the output shaft of the motor 8 and the rotating shaft of the rotating brush 7, and IO is a printed circuit board incorporating electrical parts for control. be.

FIG. 3 is a block diagram of the control circuit of the embodiment shown in FIG.
v power source; 11 is a fan motor that sucks dust from the cleaning surface through the power brush l, extension pipe 2, and hose 3;
2 is a power supply control element (for example, a triac) that supplies the voltage of the power supply E to the rotary brush drive motor 8;
3 is a control signal generation circuit that receives the output of the rotation sensor 6 and controls the power supply control element 12; 14 is a current sensor that detects the current supplied from the power source E to the power brush motor 8; and 15 is a circuit that detects the suction force of the fan motor 11. A hand control unit for setting, 16 a power control element (for example, triac) that controls the voltage of the power source E and supplies it to the fan motor, and 17 a current sensor! 4
and a control signal generation circuit that receives the output of the handheld control section 15 and controls the power supply control element 16.

In such a configuration, the power brush l shown in FIG.
is installed on the cleaning surface (floor surface), and the user uses the power brush l.
When the wheel 5a to 5d is moved, the wheels 5a to 5d rotate. As a result, the rotation sensor 6 outputs a signal, and the control signal generating circuit 3 outputs a drive signal to the power control element 12. The power supply control element 12 receives the drive signal and supplies the voltage of the power supply E to the motor 8, so that the motor 8 rotates and the rotating plane 7 is driven. When the current supplied from the power source E to the motor 8 is detected by the current sensor 14 and the output of the current sensor 14 is input to the control signal generation circuit 17, the control signal generation circuit 17
outputs a drive signal to the 14-source control element 16, and the power supply control element I6 drives the fan motor 11 at the rotational speed set by the hand-held control unit 15. In this way, as the power brush 1 moves, the motor 8 and fan motor 11 are driven, and the cleaning surface is cleaned.

Next, when the user stops the power swing 1 on the cleaning surface, the wheels 5a to 5d stop, so the output of the rotation sensor 6 also stops. When the output of rotation sensor 6 stops,
The control signal generation circuit 13 generates a control signal when a built-in timer measures a predetermined period of time (for example, 5 to 15 seconds) and the output of the rotation sensor 6 remains stopped even after the measurement ends. Circuit +3 stops the drive signal to the power control element 12. As a result, power control element +2 stops supplying power to motor 8. Therefore, the output of current sensor [4] stops and the control signal generation circuit! 7 stops the drive signal to the power supply control element 16, and ii the power supply control element 16 stops the fan motor 11. In this way, the user can request the motor 8 to stop after a predetermined period of time.
and the fan motor 2 automatically stops. Therefore, continuous suction work is not performed at the same location on the cleaning surface (floor surface), and damage to the floor surface is prevented.

Note that the present invention can also be applied to a so-called upright cleaner in which a suction part and a vacuum cleaner body are integrated.

(G) Effects of the Invention According to the present invention, cleaning can be started and stopped automatically without operating a switch.

Furthermore, since successive suctions from the same location on the cleaning surface are automatically prevented, the cleaning surface will not be damaged by suction. Furthermore, since the fan motor automatically stops whenever cleaning is not performed, unnecessary noise and power consumption are prevented.

[Brief explanation of drawings]

1 is a perspective view showing an embodiment of the present invention, FIG. 2 is an explanatory diagram of the main part configuration of FIG. 1, and FIG. 3 is a block diagram of a control circuit of the embodiment shown in FIG. 1. l...Power brush, 2...Extension pipe, 3...Hose, 4...
・Vacuum cleaner body, 5a to 5d...Movement wheels, 6...Rotation sensor 7...Rotating brush, 8...Motor, 9...・・・
・Belt, 11...Fan motor, 12.16...Power control element, 13.
17... Control signal generation circuit, 14...
...Current sensor 15...Hand control section, E...
power supply. Figure 1

Claims (1)

[Claims] 1. In a vacuum cleaner equipped with a fan motor that moves the suction part onto the cleaning surface and sucks dust from the cleaning surface through the suction part, a sensor that detects the movement and stop of the suction part with respect to the cleaning surface, and a suction part A drive circuit that receives sensor output when the suction unit moves relative to the cleaning surface and drives the fan motor, and a drive circuit that receives the sensor output when the suction unit stops relative to the cleaning surface and measures a predetermined time and then drives the fan motor after the time has elapsed. A vacuum cleaner characterized by being equipped with a timer that outputs an output to a circuit to stop a fan motor.