JPH02152427A - Vacuum cleaner - Google Patents

Abstract

PURPOSE:To switch the rotation of an agitator automatically and reduce the flaws of the cleaned surface of a carpet or the like by setting a floor suction device controlling section for lowering input power to the driving motor of an agitator when dust is detected by a dust sensor, and heightening the input power to the driving motor of the agitator when the dust is not detected. CONSTITUTION:When the passing of dust is detected by a dust sensor 16, then a transistor 24 is turned ON, and a relay 19 is excited, and both ends of a variable resistor 12 are short- circuited at an (a) contact 20, and input power to a motor fan 1 is maximized. In this case, when the transistor 24 is turned ON, then a transistor 34 is turned OFF, and a relay 32 is demagnetized, and a (a) contact 33 is released, and by a phase controlling section 30, the conduction angle of a bidirectional thyristor 29 is limited to come to a value set by a resistor 31, and input power to a motor 6 is lowered, and an agitator 7 is set in a weakly rotated state. Besides, when the passing of dust comes not to be detected by the dust sensor 16, then the relay 19 is demagnetized, and the (a) contact 20 is released, and by a phase controlling section 13, the conduction angle of a thyristor 10 is limited to come to a value set by the resistance value of the variable resistor 12, and the input power to the motor fan 1 is lowered. In this case, both the ends of a resistor 31 are short-circuited at the (a) contact 33, and the input power to the motor 6 is maximized, and the agitator 7 is set in a full rotation state.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a vacuum cleaner with a floor suction device incorporating an agitator driven by a motor.

BACKGROUND OF THE INVENTION As shown in FIG. 2, this type of vacuum cleaner is constructed by attaching a floor suction device 5 to a vacuum cleaner body 2 having a built-in electric blower 1 via a hose 3 and an extension pipe 4. There is. The floor suction tool 5 includes an agitator 7 driven by a motor 6, and the agitator 7 is configured to scrape out dust from the surface 8 to be cleaned. Conventionally, the power supply circuit for the electric blower 1 and the motor 6 is configured as shown in FIG.

A bidirectional thyristor IO is inserted in series in the circuit of the electric blower 1 and the commercial power supply 9, and the bidirectional thyristor IO
The conduction angle is controlled via the phase control section I3 by operating the variable resistor 12 provided on the hand handle section 11 at the tip of the hose 3. Here, the phase control section 13 is configured such that the input power to the electric blower 1 increases as the resistance value of the variable resistor 12 decreases. The hand handle portion 11 or the extension tube 4 is provided with a dust sensor 16 in which an infrared light emitting diode 14 and a phototransistor I5 are arranged facing each other across a suction path so as to detect dust passing inside. When this dust sensor 16 detects the passage of dust, the relay 19 is energized via the inverting amplifier 17, 18, and both ends of the variable resistor 12 are short-circuited at the a contact 20, Regardless of the resistance value of the electric blower 1, the input power to the electric blower 1 becomes maximum.

Specifically, when dust passes through, the phototransistor 15
collector potential rises, and the output of the inverting amplifier 17 becomes “L”.
21 is a DC cut capacitor, which inputs only the change in the collector potential of the phototransistor 15 to the inverting amplifier 17.

When the output of the inverting amplifier 17 changes to the "L'" level, the charge in the capacitor 22 is discharged through the diode 23. At this time, the potential of the inverting input terminal (-) of the inverting amplifier 18 becomes lower than the non-inverting input terminal (+), so the output of the inverting amplifier I8 changes to the "HII level", the transistor 24 turns "on", and the relay 19 is excited, and the input power to the electric blower 1 becomes maximum. When the dust disappears, the capacitor 22 is charged again through the resistor 25, and the potential of the inverting input terminal (-) of the inverting amplifier 18 becomes the non-inverting input terminal. (+), the inverting amplifier 1
8 returns to the "L" level, the transistor 24 turns "off", the relay 19 is demagnetized, and the input power to the electric blower 1 decreases to the power determined by the resistance value of the variable resistor 12 at that time. . 28 is a power supply section for the dust sensor 16, inverting amplifiers 17, 18, and the like.

In addition, a floor suction device switch 27 provided on the hand handle 11 is connected in series to the circuit between the motor 6 and the commercial power source 9, and the agitator 7 is operated by manual operation of the floor suction device switch 27. It is turned on and off.

Problems to be Solved by the Invention In such a conventional configuration, the surface to be cleaned such as a carpet 8
When cleaning the floor, the floor suction switch 27 is turned on and the agitator 7 is rotated. However, conventionally, the agitator 7 is always rotated at full speed regardless of the presence or absence of dust.

If there is a lot of dust, even a small rotation of the Ajichitafu can be enough to remove the dust, but if it is rotated at full speed in this way, there is a problem in that it tends to damage carpets and the like.

An object of the present invention is to provide a vacuum cleaner that causes less damage to the surface to be cleaned, does not require any manual operation of a floor suction tool switch, and can sufficiently collect dust.

Means for Solving the Problems The vacuum cleaner of the present invention collects dust from a floor suction device with a built-in agitator to the vacuum cleaner body with a built-in electric blower, and uses a dust sensor to monitor the passage of dust in the suction path. and is configured to increase input power to the electric blower when the dust sensor detects dust, and lower input power to the drive motor of the agitator when the dust sensor detects dust; The present invention is characterized by being provided with a floor suction device control section that increases the input power to the drive motor of the agitator when the dust sensor does not detect dust.

Effect: According to this configuration, when the dust sensor detects dust, the input power to the electric blower increases, and at the same time, the floor suction device control unit lowers the input power to the agitator drive motor, and the rotation speed of the agitator decreases. . When the dust sensor no longer detects dust, the input power to the electric blower decreases, and at the same time, the floor suction tool control section increases the input power to the agitator drive motor, increasing the rotational speed of the agitator.

EXAMPLE Hereinafter, an example of the present invention will be described based on FIG. Components having the same functions as in FIGS. 2 and 3 showing the conventional example will be described with the same reference numerals.

FIG. 1 shows a vacuum cleaner according to the invention. The power supply circuit of the motor 6 is provided with a floor suction device control section 28 as shown below.

A bidirectional thyristor 29 is connected in series to the power supply circuit of the commercial power source 9, the motor 6, and the floor suction device switch 27, and the conduction angle of the bidirectional thyristor 29 is controlled via the phase control unit 30. be done. The conduction angle of the phase control section 30 is set by a resistor 31.

Here, the phase control unit 30 is configured such that the smaller the resistance value of the resistor 31, the higher the input power to the motor 6. A contact 33 of a relay 32 is connected in parallel to both ends of the resistor 3I, and the relay 32 is switched by a transistor 34. The base of transistor 34 is connected to the collector of transistor 24.

With this configuration, when the dust sensor 16 detects the passage of dust, the transistor 24 turns "6 on 1", the relay 19 is energized, and both ends of the variable resistor 12 are connected to a.
A short circuit occurs at the contact point 20, and the input power to the electric blower 1 becomes maximum regardless of the resistance value of the variable resistor 12 at that time. At this time, when the transistor 24 is turned on, the transistor 34 is turned off, and the relay 32 is demagnetized.
The contacts 33 are opened, and the phase control 30 limits the conduction angle of the bidirectional thyristor 29 to the value set by the resistor 31 to reduce the input power to the motor 6 and the agitator 7
is in a weak rotation state.

When the dust sensor IB no longer detects the passage of dust, the transistor 24 is turned off, the relay 18 is deenergized, the a contact 20 is opened, and the phase control unit 13 adjusts the conduction angle of the bidirectional thyristor IO. , the input power to the electric blower 1 is reduced by limiting it to the value set by the resistance value of the variable resistor 12 at that time. At this time, transistor 24 is “off”
Then, the transistor 34 turns on, and the relay 32
is excited, the a contact 33 turns "on", and the resistor 31
Both ends of the motor are short-circuited at the a contact point 33, and the input power to the motor 6 becomes maximum, and the agitator 7 becomes in a full rotation state.

In this way, when no dust passes through the suction path, the suction force of the vacuum cleaner main body 2 is weakened, but the agitator 7 is in a full rotation state and actively scrapes out dust from the surface to be cleaned 8. do. When more dust passes through the suction path, the suction force of the vacuum cleaner main body 2 becomes stronger, and the agitator 7 automatically enters a weak rotation state to prevent damage to the surface 8 to be cleaned.

Effects of the Invention As described above, according to the present invention, when the dust sensor detects dust, the input power to the agitator drive motor is reduced, and when the dust sensor does not detect dust, the input power to the agitator drive motor is reduced. Since a floor suction device control unit is installed, the agitator of the floor suction device is rotated fully only when there is no dust, and when there is a lot of dust, the agitator of the floor suction device is rotated weakly to stop unnecessary scraping. However, by automatically switching the rotation of the agitator in this way, it is possible to reduce damage to surfaces to be cleaned, such as carpets.

[Brief explanation of the drawing]

Fig. 1 is a configuration diagram of an electric circuit of an embodiment of a vacuum cleaner of the present invention, Fig. 2 is an external perspective view of the vacuum cleaner, and Fig. 3 is a configuration diagram of an electric circuit of a conventional vacuum cleaner. . 1... Electric blower, 2... Vacuum cleaner body, 3...
・Hose, 4... Extension pipe, 5... Floor suction tool, 6.
··motor. 7... Agitator, 8... Surface to be cleaned, 1B... Dust sensor. 27... Floor suction device switch, 28... Floor suction device control unit. 29... Bidirectional thyristor, 30... Phase control unit, 31... Resistor, 32... Relay

Claims (1)

[Claims] 1. When dust is collected from a floor suction device with a built-in agitator to the vacuum cleaner body with a built-in electric blower, and the passage of dust in the suction path is detected by a dust sensor, the dust sensor detects dust. In addition, when the dust sensor detects dust, the input power to the agitator drive motor is increased, and when the dust sensor does not detect dust, the agitator drive motor is configured to increase the input power to the electric blower. A vacuum cleaner equipped with a floor suction device control unit that increases the input power to the vacuum cleaner.