JP3204577B2 - Electric vacuum cleaner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a vacuum cleaner.

[0002]

2. Description of the Related Art Most home-use vacuum cleaners include a main motor,
And a control circuit thereof, a vacuum pressure generating fan, a dust bag and the like are built in the main body. On the other hand, it is separated from this main body,
An operation circuit and an operation switch are arranged in a hand operation unit connected by a flexible hose in which two to four conductive wires are spirally wound. Then, a control circuit of the main body receives an electric signal generated by operating the operation switch, and controls the main motor. That is, at present, on / off and power control are performed. In this type of conventional vacuum cleaner, the hand operation unit does not have a power supply for driving an electric circuit, and is supplied with power from the main body via the above-described two to four conductive wires.

[0003]

The two to four conductive wires entangled in the hose can be used for a long time with the vacuum cleaner.
Conductive wires may be double-insulated in order to prevent accidents such as electric shock accidents when the resin forming the hose is worn, the conductive wires inside are exposed, and there is a risk of touching the human body directly. It is regulated by law to transmit a low-voltage signal that is insulated by an insulating transformer or the like from an AC power supply that does not cause electric shock. However, if the conductive wire inside the hose is
Vacuum cleaner manufacturers have invested a great deal of cost in safety measures in addition to the original control in order to consider heavy insulation or supply of low voltage insulated by an insulation transformer or the like.

[0004] In addition, there is also an inconvenience that a total of four conductive wires are required for supplying power and transmitting operation electric signals. The present invention has been made in view of the above problems,
It is an object of the present invention to provide a vacuum cleaner that is safer and less expensive than before.

[0005]

According to a first aspect of the present invention, there is provided a vacuum cleaner comprising: a main body;
A suction cylinder portion, a suction nozzle portion, a main motor and a control circuit thereof are provided in the main body portion, and a hand operation portion including an operation circuit is provided in an appropriate position of the suction cylinder portion or the suction nozzle portion. The suction cylinder or the suction nozzle is provided with a power supply circuit that uses power generated by the wind power generator as a power supply, and this power supply circuit is used as a power supply for the operation circuit of the hand operation unit .

In this vacuum cleaner, the power supply circuit of the operation circuit uses the power generated by the wind power generator, and does not receive power supply voltage from the main body.

A vacuum cleaner according to a second aspect of the present invention comprises a main body, a suction cylinder, and a suction nozzle. The main motor is provided with a main motor and a control circuit therefor. Alternatively, in a device in which a hand operation unit including an operation circuit is provided in the suction nozzle unit, the suction cylinder unit or the suction nozzle unit includes a power supply circuit that uses power generated by a wind power generator as a power supply, and the power supply circuit is used for an operation circuit. And the power supply circuit is used as a power supply for operating electric signals from the hand operation unit to the control circuit of the main unit.

In this vacuum cleaner, the power supply circuit of the operation circuit uses the generated power of the wind power generator, and the power generated by the wind power generator is also used as the power supply of the operation electric signal to the control circuit of the main body. Since it is used, no power supply voltage is supplied from the main unit.

A vacuum cleaner according to a third aspect of the present invention includes a main body, a suction cylinder, and a suction nozzle. The main motor is provided with a main motor and a control circuit therefor. Alternatively, in a device in which a hand operation unit including an operation circuit is provided in the suction nozzle unit, the suction cylinder unit or the suction nozzle unit includes a power supply circuit that uses power generated by a wind power generator as a power supply, and the power supply circuit is used for an operation circuit. As a power source for the operation, the power supply circuit is used as a power supply for operation electric signals from the hand operation unit to the control circuit of the main unit, and the transmission of operation electric signals between the hand operation unit and the control circuit is performed by a photocoupler. Primary and secondary electrical insulation are performed using two wires.

In this vacuum cleaner, the hand operation unit and the main body are electrically insulated by the photocoupler.

[0011]

The present invention will be described in more detail with reference to the following examples. FIG. 1 is a block diagram showing a schematic circuit configuration of a vacuum cleaner according to an embodiment of the present invention. This vacuum cleaner comprises a main body 1, a suction cylinder 2, and a suction nozzle 3. The main motor 1 is provided with a main motor 4 and its control circuit 5, and the suction cylinder 2 is operated. In the apparatus provided with the hand operation unit 6 including the circuit 7, the suction cylinder unit 2 is provided with a power supply circuit that uses the power generated by the wind power generator 8 as a power supply, and this power supply circuit is used as a power supply for the operation circuit 7. At the same time, the power supply circuit is used as a power source of the operation electric signal from the hand operation unit 6 to the control circuit 5 of the main body unit 1 and the transmission of the operation electric signal between the hand operation unit 6 and the control circuit 5 is performed by the photocoupler 11. The primary and secondary electrical insulation is performed using two wires 10.

In this embodiment, since the wind power generator is used as the power source for the hand operation unit, there is no need to supply power from the main unit for the power circuit of the hand operation unit. Therefore, a wiring for that purpose is unnecessary. Further, since the operation signal of the hand operation unit is transmitted to the main unit after being insulated by the photocoupler, there is no danger of electric shock because the main unit and the hand operation unit are electrically insulated.

FIG. 2 is a diagram showing an overall schematic configuration of a vacuum cleaner in which the present invention is implemented. This vacuum cleaner includes a main body case 21, a suction tube 22, and a suction nozzle 23. The main body case 21 includes the motor 2
4. A blower 25, a filter 26, a dust bag 27, a motor control circuit 28, etc. are built in.
Reference numeral 2 denotes a hose 29 and an extension pipe 30, and a hand operation unit 31 is provided at the center. Although not shown, two conductive wires are wound around the inner wall of the hose 29. In addition, the operation unit 31 includes a generator (wind power generator) that generates a voltage according to a suction force for sucking dust.

As shown in FIG. 3, when the external pressure is sucked from the intake hole 33 by the suction pressure, the generator 32 rotates by rotating the turbine impeller 34, thereby generating a voltage. This voltage is applied to the light emitter, light receiver 35,
The power is supplied as a power supply voltage to the dust sensor circuit unit 37 including the power supply 36. It is also used as a power source for signals to the control circuit 28 of the main body case 1.

FIGS. 4 and 5 are connection diagrams showing specific circuit portions of the vacuum cleaner according to the embodiment. FIG. 4 shows a circuit unit built in the case (main body unit) 21, and includes a main motor 41,
A triac (bidirectional three-terminal thyristor) _Tc is connected in series and connected to the AC power supply 42. Further, a series circuit of a capacitor C ₁ and resistors R ₂ and R ₃ is connected in parallel to a series circuit of the main motor 41 and the triac _Tc . A series circuit of a resistor R ₁ and capacitor C ₂ are connected in parallel with the TRIAC T _c. Further, the gate G of the triac T _c, the connection point of the resistors R ₂ and R _3,
A point of the rectifier circuit D ₁ of the diode bridge configuration, b point is connected. The points c and d of the rectifier circuit D ₁ are connected to the collector and the emitter of the transistor Q ₁ , respectively.

[0016] The transistor to Q ₁ base and resistor R ₄ between an emitter connected, further the transistor Q ₁
The base through the resistor R _5, is connected to the collector of the transistor Q _2. A series circuit of resistors R ₆ and R ₇ is connected in parallel to the collector and the emitter of the transistor Q ₁ , and a diode D ₂ is connected between the connection point of the resistors R ₆ and R ₇ and the base of the transistor Q ₂ . A phototransistor P _T of the resistor R ₈ and the photocoupler P _c, the capacitor C
₃ is connected in parallel with the series circuit of the resistors R ₆ and R ₇ , and the connection point of the phototransistor _PT and the capacitor C ₃ is connected to the emitter of the transistor Q ₂ .

FIG. 5 mainly shows a circuit housed in the operation unit 31 at hand. The terminal T _1, T _2, the light emitting element L _D photocouplers P _c are connected. The circuit on the left side of the terminals T ₁ and T ₂ and the circuit shown in FIG. Terminal T ₃ is connected to the positive electrode of the battery BAT through a resistor R _9. A series circuit of a diode D ₃ , a resistor R ₁₀ , and a generator 43 is connected in parallel to the battery BAT. The generator 43 generates power by rotation of a fan (turbine) 44. Negative electrode of the battery BAT is connected to the common terminal of the switch SW, the switching terminal H is the resistance R _11, the switching terminal M resistor R _12, switching terminal L is connected to the terminal T ₄ via the resistor R ₁₃ I have. The switching terminal O is in an open state. Resistors R ₁₁ , R ₁₂ ,
Resistance of R ₁₃ is in the R ₁₁ <R ₁₂ <R ₁₃ relationship. The terminals T ₁ , T ₂ and the terminals T ₃ , T ₄ are connected by two conductive wires 45 in the hose 29.

Next, the operation of the circuit of this embodiment will be described.
The hand operation switch SW is initially at the 0 position. In this case, the signal output from the operation command circuit is “none”, and the vacuum cleaner remains in the standby state. Here, when the hand operation switch SW is turned on to the switching terminal L, the voltage of the generator 43 (including the floating battery BAT) becomes the resistance R
₁₀ , diode D ₃ , resistor R ₉ , terminal T ₃ , conductive wire 4
5, terminal T ₁ , light emitting element L _D , terminal T ₂ , conductive wire 45,
A current flows through the path of the terminal T ₄ , the resistor R ₁₃ , and the switch SW. Thus, the light emitting element L _D photocouplers P _c is emitted at an illuminance of an amount corresponding phases passing current, is incident on the phototransistor P _T. Phototransistor P _T is because it has the property of passing a photocurrent corresponding to the illuminance of the incident light (collector current), the AC power supply 22, via a resistor R _2, is rectified by the rectifier circuit D _1, resistors R _8, phototransistor P _T, the charging current path of the capacitor C ₃ stream, to charge the capacitor C _3.

[0019] By charging continues, the potential of the capacitor C ₃ gradually increases, and reaches the resistor R _6, the base potential of the transistor Q ₂ to which at R ₇ is reverse biased threshold, the capacitor C ₃ charge is discharged to the transistor Q _2, the moment the transistor Q ₂ is turned on. Transistor Q ₂ is turned ON, the base current to the transistor Q ₁ through a resistor R ₅ flows instantaneously, the transistor Q ₁ is ON
I do.

The transistor Q ₁ is turned ON, the diode bridge circuit D ₁ +, - terminals (c point, d point) machining gap is short moments, corollary diode AC input terminal of the bridge circuit D ₁ (a point, An instantaneous short circuit condition also occurs between point b)
Some of the divided power supply voltage by resistors R _2, R ₃ is applied to the gate G of the triac T _c, the TRIAC T _c is ignited, it becomes conductive, current flows through the main motor 41 of the load, the rotation Begin to.

[0021] The above operation by the time of the time constant for a period of up to the discharge starting from the charge start of the capacitor C _3, since the delay from "0 cross" of the AC power supply voltage waveform, by variably controlling the time constant By varying the conduction angle of the input current flowing through the main motor 41, power adjustment control (power control) becomes possible. The switching terminals of the hand operation switch SW "L", "M", by switching to "H", current passing through the light emitting element L _D is "small", "medium", can be adjusted to "large" (however, the _{R 13> R 12> R 11} ) as also appreciated illuminance of the light emitting element L _D also, "small", "medium", "large"
And changing (see FIG. 6), the time delay time constant of the capacitor C ₃ also "large", "medium", is adjusted to "small" (see FIG. 7),
The power of the main motor 21 is controlled to “small”, “medium”, and “large” (see FIG. 8).

[0022]

According to the first aspect of the present invention, since the wind power generator using the wind for suction is used as the power supply for the circuit of the hand operation unit, the power supply from the main body unit to the hand operation unit is provided. Wiring is unnecessary, and there is no need to supply a power supply voltage from the main unit to the hand operation unit. According to the second aspect of the present invention, since only signal transmission from the hand operation unit to the main body is sufficient, two conductive wires formed on the hose portion are sufficient,
Simplified. According to the third and fourth aspects of the present invention, the signal transmission from the hand operation unit to the main unit is also two-wire, but the primary and secondary electrical insulation is secured in the photocoupler. Since the hose and hand-operated parts can not only be separated from the AC power supply but also handle small signal currents, there is no need to double-insulate them, so an inexpensive hose is sufficient and the entire vacuum cleaner can be used. It can be realized at low cost. Also,
Opportunities for electric shock are reduced, and a safer vacuum cleaner is obtained.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a schematic circuit configuration of an electric vacuum cleaner according to an embodiment of the present invention.

FIG. 2 is a diagram showing an overall schematic configuration of an electric vacuum cleaner according to an embodiment of the present invention.

FIG. 3 is a sectional view showing a hand operation unit of the electric vacuum cleaner according to the embodiment.

FIG. 4 is a circuit connection diagram showing a circuit portion of the electric vacuum cleaner of the embodiment.

FIG. 5 is a circuit connection diagram showing a circuit portion of the electric vacuum cleaner according to the embodiment, together with FIG. 4;

FIG. 6 is a characteristic diagram showing a relationship between a resistance value of a photocurrent limiting resistor and a light amount (illuminance) in the electric vacuum cleaner of the embodiment.

FIG. 7 is a characteristic diagram showing a relationship between a light amount (illuminance) and a time constant of main motor control in the electric vacuum cleaner of the embodiment.

FIG. 8 is a characteristic diagram showing a relationship between a simultaneous constant and power in the vacuum cleaner of the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body part 2 Suction cylinder part 4 Main motor 5 Control circuit 6 Hand operation part 7 Operation circuit 8 Wind power generator 10 Conductive wire 11 Photocoupler

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-61-240937 (JP, A) JP-A-7-39493 (JP, A) JP-A-5-317213 (JP, A) JP-A-2- 152420 (JP, A) JP-A-62-68433 (JP, A) JP-A-61-240936 (JP, A) JP-A-57-112841 (JP, A) JP-A-57-55123 (JP, A) JP-A-64-49526 (JP, A) JP-A-58-44021 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) A47L 9/28 A47L 9/02

Claims (4)

(57) [Claims] 1. A main motor, a suction motor, and a control circuit for the main motor are provided in the main body, and an operation circuit is provided at an appropriate position of the suction cylinder or at the suction nozzle. in vacuum cleaner operation unit is provided, wherein the suction tube unit or suction nozzle unit, a power supply circuit for the generation power of the wind power generator and power, before the power supply circuit
An electric vacuum cleaner characterized in that it is used as a power supply for an operation circuit of a hand operation unit . 2. A main body, a suction cylinder, and a suction nozzle.
The main unit is equipped with a main motor and its control circuit.
Operation circuit in the appropriate position of the suction cylinder or the suction nozzle
In a vacuum cleaner the operation portion is provided comprising, before
A wind power generator is generated in the suction cylinder or suction nozzle.
Equipped with a power supply circuit that uses electric power as a power source, and operates this power supply circuit
Used as a power source for circuits and
As a power source for operating electric signals to the control circuit of the main body,
An electric vacuum cleaner characterized by using a power supply circuit . 3. A main body, a suction cylinder, and a suction nozzle.
The main unit is equipped with a main motor and its control circuit.
Operation circuit in the appropriate position of the suction cylinder or the suction nozzle
In a vacuum cleaner the operation portion is provided comprising, before
A wind power generator is generated in the suction cylinder or suction nozzle.
Equipped with a power supply circuit that uses electric power as a power source, and operates this power supply circuit
Used as a power source for circuits and
As a power source for operating electric signals to the control circuit of the main body,
Uses a power circuit and operates between the operation unit and the control circuit
Transmission of electrical signals is performed by primary and secondary electrical
A vacuum cleaner characterized in that it is performed with two lines of electrical insulation . (4) A battery is attached to the power supply circuit, and a wind power generator
Claims that are used together with Electric cleaning described in 3
Machine.