JP3286398B2 - Electric vacuum cleaner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric blower control device for a vacuum cleaner.

[0002]

2. Description of the Related Art As a prior art of the present invention, as shown in FIG. 5, a circuit diagram of a vacuum cleaner having a suction opening having a rotating brush rotated by an electric motor is provided on a cleaner body and a suction opening. The electric motor 11 and the electric blower control switch 16 provided on the hand operation unit 8 are connected by two conductors, respectively, so that the suction hose 5 connecting the cleaner body and the hand operation unit has a total capacity. There is a vacuum cleaner provided with four conductors.

[0003]

However, in the prior art, since four suction wires are provided in the suction hose, the suction hose itself becomes very heavy, and the operability during cleaning is very poor. There were disadvantages. SUMMARY OF THE INVENTION In view of the above-described drawbacks, an object of the present invention is to reduce the number of conductors of a suction hose, reduce the weight of the suction hose itself, and obtain an operable vacuum cleaner.

[0004]

The vacuum cleaner of the present invention comprises:
A cleaner body having a dust collection chamber and an electric blower, a suction hose having one end connected to a dust suction port provided in the cleaner body and the other end connected to an extension pipe, and a tip connected to the tip of the extension pipe. And a suction device having a rotary brush rotated by the driving force of the electric motor, wherein the electric motor and an electric blower control switch are connected in parallel to a power supply, and power is supplied to the electric motor. Is provided between the electric motor and a power supply, and the signal of the electric blower control switch is supplied to the electric blower control circuit via the power supply line only during a period when power is not supplied to the electric motor by the control element. It is characterized by inputting.

Further, according to the present invention, the control element is controlled by the output of the electric blower control circuit to stop supplying power to the electric motor, and the signal of the electric blower control switch is incorporated into the electric blower control circuit. It is characterized by.

Further, according to the present invention, an output of the electric blower control circuit is output in synchronization with a frequency of a power supply, the output of the electric blower control circuit is controlled to stop supply of electric power to the electric blower, and A signal of a control switch is incorporated in the electric blower control circuit.

Further, according to the present invention, the output of the electric blower control circuit is output at regular intervals, and the output of the electric blower control circuit is controlled to stop the supply of electric power to the electric motor and the switch for controlling the electric blower. Is input to the electric blower control circuit.

[0008]

According to the vacuum cleaner of the present invention, the signal of the electric blower control switch is input to the electric blower control circuit by using the power supply line of the rotary brush driving electric motor provided along the suction hose. Further, the control element is controlled by the output of the electric blower control circuit to temporarily stop the power supply to the electric motor, and during that period, the signal of the electric blower control switch is taken into the electric blower control circuit.

[0009]

An embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows the whole vacuum cleaner of the present embodiment, wherein 1 is a vacuum cleaner body having an electric blower 2 and a dust collection chamber 3 therein, and 4 is a communication with the dust collection chamber 3. It is a dust suction port provided in the cleaner body. Reference numeral 5 denotes a suction hose having one end connected to the dust suction port 4 and the other end connected to the extension pipe 6, and two power supply wires 7 spirally provided on the outer periphery thereof. Reference numeral 8 denotes a hand operation unit. Reference numeral 9 denotes a suction port connected to the end of the extension pipe 6, and a rotary brush 10 and the rotary brush 10 therein.
And a rotating brush driving motor 11 for rotating the motor.

FIG. 2 is a circuit diagram of the present embodiment. Reference numeral 12 denotes a commercial power supply, and 13 denotes an electric blower control element such as a triac connected in series to the electric blower 14 and the commercial power supply. Reference numeral 15 denotes a full-wave rectifier circuit including a diode bridge, which supplies DC power to the rotating brush driving motor 11. Reference numeral 16 denotes an electric blower control switch provided in the hand operation unit, which is connected in parallel with the rotary brush driving electric motor 11 and has two electric blower control circuits 17 and a full-wave rectifier circuit 15 in the cleaner main body 1. Are connected by power supply lines 7 and 7. Reference numeral 18 denotes a motor control element such as a triac provided between the rotating brush driving motor 11 and the full-wave rectifier circuit 15. Reference numeral 19 denotes a switching element having one end connected to the full-wave rectifier circuit 15 and the other end connected to the ground line of the electric blower control circuit 17. The power from the full-wave rectifier circuit 15 is not supplied to the rotary brush driving motor 11. It is sometimes turned on to connect the connection line with the full-wave rectifier circuit 15 and the earth line. In addition, 2
Reference numerals 8 and 29 denote diodes provided for preventing backflow.

Next, the operation of the embodiment constructed as described above will be described. First, a first embodiment will be described with reference to FIG. A zero-cross signal 30 (b in FIG. 3) synchronized with the waveform of the commercial power supply 12 (a in FIG. 3) is input to the electric blower control circuit 17. A switching element control signal 31 (C in FIG. 3) is input from the electric blower control circuit 17 to the switching element 19 based on the zero cross signal 30, and the switching element 19 is turned on while the signal is being input. This switching element control signal is output once in one cycle of the power supply during the non-conduction period of the phase-controlled motor power supply. At this time, the motor control element 1
8 is an OFF state, and the electric blower control switch 16 is
Is turned on, the electric blower control switch 16 passes from the power supply line (A) of the control circuit power supply circuit (5 V power supply circuit) 23 through the resistor 24 (B). And, a current flows through the (C) point, the switching element 19, the (D) point, and the earth line of the electric blower control circuit 17. As a result, the voltage divided by the resistor 24 and the resistors 25, 26, and 27 of the electric blower control switch 16 changes the voltage of the electric blower control circuit 1 from the point (E).
7 is input as an input signal, and controls the electric blower 14 via the electric blower control element 13 according to the input signal. FIG. 3D shows a voltage waveform applied to the rotary brush driving motor 11, and FIG.
The voltage waveform between (C) and (B) is shown. In this embodiment, the power supply applied to the rotary brush driving motor 11 is phase-controlled by the electric blower control circuit 17, and when the power is not supplied, the operation state of the hand operation unit is read.

Next, a second embodiment will be described with reference to FIG.
FIG. 4A shows the waveform of the commercial power supply 12, and FIG. 4B shows the waveform of the zero cross signal 30 synchronized with the commercial power supply. FIG. 4C shows the voltage waveform of the rotating brush driving motor 11, which is configured not to energize the rotating brush driving motor 11 for a certain period of time from the rise of the zero-cross signal. In this case, the period during which power is not supplied is once per cycle of the commercial power supply based on the signal from the electric blower control circuit 17, but this is performed at regular intervals based on the signal from the electric blower control circuit 17. (For example, according to an experiment, since the time during which the switch of the hand operation unit is normally pressed is kept at least 0.5 seconds, and the average of the time being pressed is about 1 second, in order to reliably detect the operation of the hand operation unit, It has been found that it is better to set the fixed period to 0.5 seconds). 4 shows a voltage waveform between (C) and (B), and shows a waveform in a state in which the operation state of the hand operation unit is read when the rotary brush driving motor 11 is not energized (FIG. 4). 4). The electric blower 14 is controlled via the electric blower control element 13 according to the input signal taken into the electric blower control circuit 17 in this manner.

In this embodiment, since the signal of the electric blower control switch is put on the power supply line as described above, two power supply lines are connected to the suction hose connecting the cleaner body and the hand operation unit. It is only necessary to dispose it, and the suction hose can be made lightweight, resulting in a vacuum cleaner with excellent operability.

[0015]

According to the present invention, in a hand-operated vacuum cleaner having a suction opening having a rotary brush driven by an electric motor, only two lead wires are required for the suction hose, and the suction hose itself is provided. And the operability during cleaning becomes very good. Further, since the power supply to the rotating brush driving motor is stopped for a certain period in synchronization with the power supply frequency (phase control), vibration and noise of the motor can be minimized. Furthermore, since the power supply to the rotary brush drive motor is stopped for a certain period of time at a certain period of time and the signal of the electric blower control switch is taken in that period, by adjusting this time, it becomes unnecessary The signal of the electric blower control switch can be accurately taken in without stopping the input to the electric motor.

[Brief description of the drawings]

FIG. 1 is an external view of an entire vacuum cleaner according to an embodiment of the present invention.

FIG. 2 is a control circuit diagram of a vacuum cleaner according to an embodiment of the present invention.

FIG. 3 is a timing chart showing a voltage waveform of the vacuum cleaner according to the first embodiment of the present invention;

FIG. 4 is a timing chart showing a voltage waveform of an electric vacuum cleaner according to a second embodiment of the present invention.

FIG. 5 is a control circuit diagram of a conventional vacuum cleaner.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vacuum cleaner main body 2 Electric blower 3 Dust collecting chamber 4 Dust suction port 5 Suction hose 6 Extension pipe 7 Power supply line 9 Suction opening tool 10 Rotary brush 11 Rotary brush drive motor (motor) 12 Commercial power supply 16 Electric blower control switch 17 Electric Blower control circuit 18 Motor control element (control element) 19 Switching element

──────────────────────────────────────────────────続 き Continuation of the front page (72) Yoshikazu Ota 2-18-18 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (56) References JP-A-59-67927 (JP, A) JP-A Sho 58-134655 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) A47L 9/28 A47L 9/04

Claims (4)

(57) [Claims] A cleaner body having a dust collecting chamber and an electric blower; a suction hose having one end connected to a dust suction port provided in the cleaner body and the other end connected to an extension pipe;
A vacuum cleaner having a suction port having a rotating brush connected to a tip of the extension pipe and rotated by a driving force of the electric motor, wherein the electric motor and an electric blower control switch are connected in parallel to a power supply; And a control element for controlling power supply to the electric motor is provided between the electric motor and a power supply, and the signal of the electric blower control switch is supplied to the power supply line only during a period when the electric power is not supplied to the electric motor by the control element. An electric vacuum cleaner, wherein the electric vacuum is inputted to an electric blower control circuit via the controller. 2. The electric blower control circuit controls the control element to stop supplying power to the electric motor, and incorporates a signal from the electric blower control switch into the electric blower control circuit. The vacuum cleaner according to claim 1, wherein: 3. An output of the electric blower control circuit is output in synchronization with a frequency of a power supply, the output of the electric blower control circuit is controlled to stop the supply of electric power to the electric motor, and the control of the electric blower control switch is performed. The electric vacuum cleaner according to claim 2, wherein a signal is incorporated into the electric blower control circuit. 4. An output of the electric blower control circuit is output at regular time intervals, the output of the electric blower control circuit is controlled to stop the supply of electric power to the electric motor, and a signal of the electric blower control switch is output from the electric blower control circuit. 3. The vacuum cleaner according to claim 2, wherein the vacuum cleaner is incorporated in an electric blower control circuit.