JPH06339444A - Vacuum cleaner - Google Patents

Abstract

PURPOSE:To reduce the required number of wiring by dividing the a.c. waveform of a commercial power supply into a feeding phase area and a feed-stop phase area, and using the same common wiring in supplying driving power to a brush driving motor and in reading a setting signal. CONSTITUTION:A vacuum cleaner is provided with a zero-cross signal generator circuit 14 which outputs a rectangular wave signal to a microcomputer 13 as a zero-cross signal via a resistance R1 only for half of a cycle in which the polarity of a commercial power supply 11 is negative by turning on a transistor Tr1 for the other half of the cycle in which the polarity is positive, and by turning off the Tr1 for the first half of the cycle in which the polarity is negative. When the zero-cross signal is input, the Tr2 of an operation setting signal reading control circuit 17 is turned on so that a set value provided by a setting circuit provided on the control panel of a hose grip portion can be read into the microcomputer 13. Also, a blower electric motor control circuit 15 and a brush driving motor control circuit 16 have their respective triacs TR1, TR2 turned on in response to an ignition signal from the microcomputer 13 to drive a blower electric motor 2 and a brush driving motor, respectively.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum cleaner, and more particularly to a vacuum cleaner suitable for reading operation state setting signals of a blower and a rotary brush and controlling the drive of a blower motor and a brush drive motor.

[0002]

2. Description of the Related Art As an electric vacuum cleaner, as shown in FIG. 5, a vacuum cleaner main body 1 is provided with a blower electric motor 2 for sucking dust, and a grip portion 4 provided at a tip end of a suction hose 3 is provided with an operation panel 5. Is formed and the extension pipe 6 is connected to the end of the
Further, a brush drive motor 9 for driving the rotary brush 8 is provided on the floor suction inlet 7 at the tip, and when cleaning is performed, the hose grip portion 4 is held and the operation panel 5 is provided. 2. Description of the Related Art There is known an electric vacuum cleaner which operates a key switch to change the dust suction force by controlling the speed of a blower motor 2 or to turn on / off the drive of a rotary brush 8.

[0003]

However, in this type of vacuum cleaner, a setting signal is input from the operation panel 5 to the cleaner body 1 and a drive power is supplied from the cleaner body 1 to the brush drive motor 9. Will be required. In the conventional device, since a total of four lines of the setting signal line and the power supply line are embedded in the suction hose 3, the hose becomes thick and heavy and the operability is poor, and the connection point with the cleaner body 1 Also, four connection points with the hose grip portion 4 are required respectively, and there are many connection points, which easily cause poor contact and lack reliability.

It is an object of the present invention to solve the above problems, reduce the load on the hose grip portion, and reduce the number of electric wires embedded in the hose to provide a highly reliable electric vacuum cleaner. .

[0005]

According to a first aspect of the present invention, a blower body, a blower motor and a control circuit for driving the blower are provided in a cleaner body, and a rotary brush and a suction brush connected to a tip of an extension pipe. A rotary brush drive motor for driving a rotary brush, one end of which is connected to the cleaner body and the other end of which is connected to an extension pipe. To set a drive state of the blower and the rotary brush in a hose grip portion that connects an extension pipe of a suction hose. In the electric vacuum cleaner equipped with the setting panel of, two wires are arranged in the suction hose and the extension pipe,
An operation setting circuit that sets the operation state of the blower and the rotating brush provided on the operation panel and the brush drive motor provided on the suction port device are connected in parallel to the two wires connected to the cleaner body. Then, the AC waveform of the commercial power supplied to the cleaner body is phase-divided into a power feeding phase section for the brush drive motor and a power feeding stop phase section, and the power feeding phase section is divided into the power feeding phase section via the two wires. While supplying commercial power to the brush drive motor, the setting value set in the operation setting circuit is input to the control circuit provided in the cleaner body during the power supply stop phase section.

According to a second aspect of the present invention, there is provided a drive direction switching circuit for driving the brush drive motor in the forward direction or the reverse direction according to the forward movement or the backward movement of the floor suction port.

[0007]

According to the first aspect of the present invention, the drive power supply to the brush drive motor and the reading of the setting signal can be performed by using the same common wiring. As a result, the number of wirings embedded in the hose can be reduced. Therefore, the load on the hose grip can be reduced.

According to the second aspect, since the brush drive motor rotates in the same direction only by holding the hose grip portion and moving it back and forth, the operability of the floor suction port device is improved, and the floor suction port device can be operated lightly.

[0009]

1 to 3 are circuit configuration diagrams of a controller for an electric vacuum cleaner showing an embodiment of the present invention. The vacuum cleaner of this embodiment is mechanically different from that shown in FIG. 5 except that the extension pipe and the suction hose have two wires embedded therein.
Since it is the same as that shown in FIG. 5, the mechanism portion will be described with reference to FIG. 5 for convenience of explanation.

In FIGS. 1 to 3, 11 is a commercial power source. The power supply circuit 12 steps down the voltage of the input commercial power supply 11 to a voltage close to 5V by the transformer T, rectifies the output of the transformer into direct current by the full-wave rectification circuit REC, and outputs 5V from the full-wave rectified output. A constant voltage IC produces a stable DC voltage of 5 V and supplies it to the microcomputer 13 and its peripheral circuits.

The microcomputer 13 is a RAM, RO
Power supply circuit 1 with built-in M, μCPU and A / D converter
It operates by receiving the 5V DC voltage from 2, inputs the zero-cross signal from the zero-cross input terminal, calculates the timing to read the set value set by the keys on the operation panel 5, and controls the key reading control from the key reading control output terminal. A signal is output to read the set value from the key reading terminal, the firing angle of the blower motor 2 and the brush drive motor 9 is calculated based on the set value, and the blower control output terminal and the brush drive motor control output terminal are used. Each outputs an ignition signal.

In the zero-cross signal generation circuit 14, the transistor Tr ₁ is turned on during the half cycle of the commercial power supply in which the polarity of the commercial power supply 11 input thereto is positive, and the transistor Tr ₁ is turned off during the remaining negative half cycle. Due to
As shown in FIG. 4, a rectangular wave signal of 5 V is input to the microcomputer 13 via the resistor R ₁ as a zero-cross signal only during a period in which the polarity of the commercial power source 11 is a negative half cycle.

The blower motor control circuit 15 turns on / off the triac TR ₁ via the phototriac coupler PC ₁ for signal separation in response to the ignition signal output from the microcomputer 13, so that the blower motor from the commercial power supply 11 is turned on. The phase of the conduction angle of the alternating current supplied to 2 is controlled to control the input power of the blower motor 2.

The brush drive motor control circuit 16 turns on the triac TR ₂ via the phototriac coupler PC ₂ in response to an ignition signal output from the microcomputer 13 similarly to the blower motor control circuit 15, thereby turning on the commercial power supply. The AC conduction angle supplied from 11 to the brush drive motor 9 is phase-controlled to control the input power of the brush drive motor 9.

Operation setting signal read control circuits 17 and 18
Turns on the transistor Tr ₂ in response to the read timing control signal output from the microcomputer 13, and sets the microcomputer of the set value set by the operation setting circuit 21 shown in FIG. 2 provided on the operation panel 5 of the hose grip section 4. It enables reading into the computer 13. That is, when the transistors Tr ₂ and Tr ₄ are in the ON state,
The analog voltage divided by the pull-up resistor R ₂ and the resistance value selected by the key in the operation setting circuit 21 is divided into the resistor R ₃
It is a circuit for reading into the cleaner body 13 via the.

The operation setting circuit 21 includes key switches K _{1 to} K ₅ for setting the states of the blower motor and the rotary brush, for example, OFF of the blower motor, weak notch, strong notch, rotary brush on / off, and the like. Corresponding resistors R with different values
₄ consists of ~R ₈ Metropolitan.

The voltage switch circuit 22 divides the voltage between the resistors R ₉ and R ₁₀ so that the voltage between the base and emitter of the transistor Tr ₃ drops below the operating limit voltage of the transistor when the voltage of the wiring 20 drops below 5V. By setting in advance, when the voltage on the wiring 20 side becomes a positive 5V voltage, the transistor Tr ₃ is turned off and the transistor Tr ₄ is turned on, and 5V is supplied to the operation setting circuit 21 via the pull-up resistor R ₂ .

The power supply display circuit 23 includes a hose grip portion 4
When the power is supplied to the device, the light emitting diode PH is caused to emit light to display the power supply state.

The drive direction switching circuit 31 includes the floor suction port 7
The switches S ₁ and S ₂ are selectively closed according to the moving direction of the floor suction port device 7 and a current of one polarity is applied to the triac TR ₃ so that the same direction as the moving direction is obtained. It is a circuit for rotating the brush drive motor 9.

As can be seen from FIGS. 1 to 3, the blower motor 2 and the circuits 11 to 18 described above are provided inside the vacuum cleaner body 1, and the circuits 21 to 23 are provided on the operation panel 5. The brush drive motor 9 and the circuit 31 are arranged in the floor suction port 7, and these circuits are connected by two wires 10 and 20.

Next, the operation of the control device configured as described above will be described with reference to the time chart of FIG.

The power supply circuit 12 produces a stable DC voltage of 5 V from the input commercial power supply 11 and the microcomputer 1
3 and its peripheral circuits. Thereby, the microcomputer 13 operates. In addition, the zero-cross signal generation circuit 14 has a transistor Tr _{1 for} a negative half cycle of the AC voltage waveform of the commercial power supply 11, that is, a period in which the wiring 20 side is positive.
A 5 V rectangular wave signal of the power supply circuit 12 generated by turning off is input to the microcomputer 13 as a zero-cross signal.

When the microcomputer 13 receives this zero-cross signal, it outputs a "high" level key read control signal to the base of the transistor Tr ₂ of the operation setting signal read control circuit 17 for a time from the zero cross point of the AC waveform of the commercial power supply 11. Is output to turn on the transistor Tr ₂ .

On the other hand, the voltage switch 22 includes a diode D.
_The commercial power supply 11 is supplied via ₁ only during the negative half cycle of the AC waveform of the commercial power supply 11.
While the voltage level of the AC voltage waveform is high, the transistor Tr ₃ is turned on, the transistor Tr ₄ is turned off, and the operation setting circuit 21 is disconnected from the wiring 20. While the commercial power supply 11 is not applied to the brush drive motor 9, the transistor Tr ₃ is turned off and the transistor Tr ₄ is turned on, so that the operation setting circuit 21 is connected to the wiring 20 only during that period and the pull-up resistor R _{2 is used} . A constant voltage of 5V is supplied to the operation setting circuit 21.

As a result, as shown in FIG. 4, during the period a, the transistor Tr ₂ of the operation setting signal reading control circuit 17 is turned on by the key reading control signal output from the microcomputer 13, so that the operation setting circuit 21 is turned on. read becomes possible, the resistance R ₃ of the analog voltage corresponding to the resistance value corresponding to one of the key switches K ₁ ~K ₅ which is selected this time is the operation setting signal read-in control circuit 18
Is read by the microcomputer 13 at the timing of b via.

The analog voltage from the operation setting circuit 21 read by the microcomputer 13 is converted into a corresponding digital value by an A / D converter provided inside, and the digital value is converted into, for example, O of the blower motor 2.
FF, weak notch, strong notch, rotary brush on / off, etc. are determined, and drive control of the blower motor 2 or the brush drive motor 9 is performed so as to be in the corresponding state. For example,
When it is determined that the notch is weak, the value of the electric current flowing through the blower motor 2 is reduced, so that a firing signal is output to the blower motor control circuit 15 at the timing when the firing angle becomes large to fire the triac TR ₁ .

The firing signal of the triac TR ₂ for driving the brush drive motor 9 is output to the brush drive motor control circuit 16 such that, for example, the firing signal shown in c is always output after the key reading control signal is output. Then Triac TR
Fire ₂ As a result, the AC voltage waveform having the firing phase angle of d is applied to the brush drive motor 9 from the wirings 10 and 20.

As described above, the brush drive motor 9 is supplied with the AC component of the phase after the key reading signal of the AC voltage waveform of the commercial power source 11 is output. Further, during this period, Tr ₄ of the voltage switch circuit 22 is turned on to supply a constant DC voltage of 5 V to the operation setting circuit 21 from the wiring 20 via the pull-up resistor R ₂ of the operation setting signal read control circuit 18. As a result, the two wirings are shared and the drive control of the brush drive motor 9 and the operation setting circuit 21 for the microcomputer 13 are performed.
The setting value of can be read.

[0029]

As described above, according to the present invention, the drive power supply to the brush drive motor and the reading of the setting signal can be performed using the same common wiring, and as a result, the wiring to be arranged in the hose. The number can be reduced and the load on the hose grip can be reduced.

Further, since the moving direction of the floor suction inlet coincides with the rotating direction of the rotary brush, the operability of the floor suction inlet when holding the hose grip is improved, and the floor suction inlet can be operated lightly. Become.

[Brief description of drawings]

FIG. 1 is a circuit diagram of a portion arranged inside a cleaner body of a controller for an electric vacuum cleaner according to an embodiment of the present invention.

FIG. 2 is a circuit diagram of a portion arranged on the operation panel of the hose grip portion of the control device for the electric vacuum cleaner according to the embodiment of the present invention.

FIG. 3 is a circuit diagram of a portion of the control device for the electric vacuum cleaner according to the embodiment of the present invention, which is disposed in the floor suction inlet at the end of the extension pipe.

FIG. 4 is a time chart for explaining the operation of the control device for the electric vacuum cleaner according to the embodiment of the present invention.

FIG. 5 is a conceptual diagram of an electric vacuum cleaner.

[Explanation of symbols]

 1 Vacuum cleaner body 2 Blower electric motor 3 Suction hose 4 Hose grip part 5 Operation panel 6 Extension pipe 7 Floor suction device 8 Rotating brush 9 Brush drive motor 11 Commercial power supply 12 Power circuit 13 Microcomputer 10 Wiring 20 Wiring 21 Operation setting circuit 31 Drive direction switching circuit

Claims (2)

[Claims] 1. A cleaner body, a blower, a blower motor and a control circuit for driving the blower, a suction brush connected to a tip of an extension pipe, a rotary brush, and a rotary brush drive motor for driving the rotary brush. An electric vacuum cleaner comprising a setting panel for setting a driving state of the blower and a rotary brush in a hose grip portion that connects an extension pipe of a suction hose whose other end is connected to an extension pipe in the cleaner body. Two wirings are arranged on the suction hose and the extension pipe, and an operation setting circuit for setting operation states of the blower and the rotary brush provided on the operation panel on the two wirings connected to the cleaner body, The brush drive motor provided in the suction port device is connected in parallel, and the AC waveform of the commercial power supplied to the cleaner body is changed to the brush drive model. The power supply phase section to the motor and the power supply stop phase section are divided into phases, and the brush drive motor is supplied with commercial power through the two wirings while the power supply stop phase section is supplied. An electric vacuum cleaner, wherein a set value set in an operation setting circuit is input to a control circuit provided in the cleaner body. 2. The electric vacuum cleaner according to claim 1, further comprising a drive direction switching circuit for driving the brush drive motor in a normal direction or a reverse direction in response to forward movement or backward movement of the floor suction inlet.