JPH01214328A - Vacuum cleaner control device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a vacuum cleaner control device having a power nozzle used in general households.

2. Description of the Related Art A conventional electric vacuum cleaner control wJ device will be described below with reference to the drawings.

Figure 3 shows the air volume JI of a conventional vacuum cleaner! FIG. 1 is a circuit diagram of one circuit. In Figure 3, the commercial power supply includes an electric blower t
11 and a bidirectional thyristor 2 are connected in series.

3 is a control circuit for bidirectional thyristor 2;
The trigger timing of the bidirectional thyristor 2 of the main body control circuit 7 is controlled by a switch 5 and a variable resistor 6 provided on the hand operation section 4 at the end of the hose. 8 is a power nozzle installed at the end of the hose, and an electric motor 9 built into this power nozzle
The rotating brush is configured to be driven by the rotating brush.

Reference numeral 10 denotes a switch provided on the hand-operated unit 4 to turn on and off the electric motor [9 inside the power nozzle 8.

Problems to be Solved by the Invention In the conventional configuration as described above, the electric motor 9 that drives the rotating brush is turned on and off by the user manually using the switch 10.
The problem was that it was inconvenient to use because it had to be turned on and off. Further, when cleaning, a manual switch operation is required to drive the rotating brush on the carpet and stop the rotating brush on the fold or floor, which also poses a problem of poor usability.

The present invention is intended to solve the above-mentioned conventional problems, and is provided with a detector that detects the air volume in the air flow path of the power nozzle, and is configured so that the rotation speed of the rotating brush can be varied according to the air volume. The purpose of this invention is to provide an intelligent device for a vacuum cleaner that can perform appropriate cleaning depending on the surface.

Means for Solving the Problems In order to solve the above problems, the vacuum cleaner control of the present invention is
! The device is a vacuum cleaner having a power nozzle that drives a rotating brush by an electric motor, and includes a detection means for detecting an air volume in an air flow path, and controls power supplied to the electric motor according to an output of the detection means. A control means is provided so that the number of rotations of the rotating brush can be automatically varied in accordance with changes in air volume.

Effect With the above configuration, the air volume in the power nozzle air flow path is detected by the air volume detection means, the power supplied to the electric motor is controlled according to the output from the air volume detection means, and the rotation speed of the rotating brush is automatically adjusted. For example, if you set the suction power of the vacuum cleaner to a high level on a carpet, the suction air volume will also increase, so the rotating brush of the power nozzle will also rotate at high speed according to the increased suction air volume, increasing the dust collection power. In addition, when on the floor or on a folding floor, the suction force can be set low to reduce the suction air volume, and the rotation speed of the rotating brush can be automatically set to a low value. This improves usability and allows for automatic cleaning that is appropriate for the floor surface, rather than manual operation.

EXAMPLE Hereinafter, an example of the present invention will be described based on the drawings.

Fig. 1 is a block diagram of the control circuit of the motor for driving the rotating brush of a vacuum cleaner, which is an embodiment of the present invention.It is built into the power nozzle, and the commercial power supply is connected to the vacuum cleaner body via a hose. has been done.

In FIG. 1, a bidirectional thyristor 11 and a power source 1174312 are connected in series to both ends of a commercial power source.

A gate terminal of this bidirectional thyristor 11 is connected via a trigonal element 13 to the other end of a capacitor 14 whose one end is connected to a commercial power supply. 15 is the capacitor 14
This is a control circuit connected to the other end of the capacitor 14 in order to vary the charging speed of the airflow detector 16.
An electric @ number (voltage value) corresponding to m on a one-to-one basis is input to the control circuit 15 via the constant current circuit 17 at the next stage. That is, the air volume in the air flow path of the power nozzle is detected by the air volume detector 16, the current value of the constant current circuit 17 is set based on the amount of change, and the charging speed of the capacitor 14 is varied via the control circuit 15. Capacitor 14
By changing the charging speed of bidirectional thyristor 1
The trigger timing of motor 12 is continuously varied.
The power is controlled according to FiM.

FIG. 2 is a circuit diagram embodying FIG. 1. In FIG. 2, a bidirectional thyristor 11 and an electric motor 312 are connected in series to both ends of the commercial power source.

A resistor 17 is connected to the gate terminal of the bidirectional thyristor 11 via an element 13 to the other end of a capacitor 14 whose one end is connected to a commercial power source, and the other end of the resistor 17 is connected to an AC voltage of a diode bridge 18. A transistor 19 and a resistor 20 are connected in series between the DC terminals of the diode bridge 18 . 21 is an airflow detector, and its output is calculated! It is connected to the non-inverting terminal of the air volume A unit 22, and its inverting terminal is connected to the emitter terminal of the transistor 19. Further, the output of the operational amplifier 22 is connected to the base of the transistor 19 via a resistor 23.

The operation will be explained using the above configuration. In FIG. 2, the am detector 21 detects the air volume in the power nozzle air flow path, and when Jlffi increases,
The output voltage is also operated to increase accordingly. That is,
When the output of the airflow detector 21 increases, the emitter potential VA of the transistor 19 also increases, and the current V^/Rε set by the emitter resistance Rε and the emitter potential V^ increases to the capacitor 1.
4, and when the output of the air volume detector 21 changes, V^ changes, and the charging speed of the capacitor 14 changes. Therefore, the trigger timing of the bidirectional thyristor 11 changes, the power supplied to the electric motor 12 changes, and the rotation speed of the rotating brush of the power nozzle changes. In this way, the rotation speed of the rotating brush is automatically set according to the air volume.

Effects of the Invention As described above, according to the present invention, the power nozzle includes a detection means for detecting the air volume in the air flow path, and a control means for controlling the power supplied to the electric motor according to the output of the detection means. By providing this, the number of rotations of the rotating brush can be automatically changed according to the air volume, which improves usability and automatically performs appropriate cleaning according to the floor surface.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an 1llIJ111 circuit of a motor for driving a rotating brush of a vacuum cleaner, showing an embodiment of the present invention;
FIG. 2 is a circuit diagram embodying FIG. 1, and FIG. 3 is a circuit diagram of a conventional vacuum cleaner control circuit. 11... Bidirectional thyristor, 12... Electric motor, 1
3...T road, 16.21...Air volume detector, 17...
・Constant current circuit, 18--Diode bridge, 19-
...Transistor, 22...Arithmetic #A@device. Agent Kaede Morimoto Private 1st page

Claims (1)

[Claims] 1. A vacuum cleaner having a power nozzle that drives a rotating brush by an electric motor, which includes a detection means for detecting the air volume in an air flow path, and controls the power supplied to the electric motor according to the output of the detection means. A control device for a vacuum cleaner is provided with a control means and is configured to automatically vary the rotation speed of a rotating brush according to changes in air volume.