JPS58157393A - Electric cleaner - Google Patents

Abstract

PURPOSE:To enable two conductors to be sufficient from an electric cleaner to a hand switch by arranging a resistor and a bidirectional 3-terminal controlled rectifier in parallel with each other, and suitably connecting the trigger circuit and a switch circuit and the like. CONSTITUTION:When a switch 11 and a contact S1 of a hand switch 5 are closed, a motor-driven blower 2 is rotated, a rated voltage is applied to a motor 13 by the switching operation of a controlled rectifier T1, and an ordinary cleaning can be performed. When the rotating speed of the motor 2 is altered, the contact S2 is closed instead of the contact S1. Thus, the rectifier T1 is closed, and a thyristor 12 is controlled through an amplifier 15. Since the rotation of the blower 2 is gradually increased, in case that the hand switch 5 is contacted at the contact S1 from the contact S2 when the blower 2 rotates at the desired rotating speed, the cleaning can be performed at the desired speed.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vacuum cleaner that easily and reliably controls the speed of an electric blower.

Conventionally, remote control of vacuum cleaners incorporates a low-voltage transformer into the vacuum cleaner body, and applies this low voltage to a conductor embedded in the hose. The speed of the blower was controlled. However, in the case of a vacuum cleaner with an electric floor suction port, a total of four conductive wires are required: two conductors to operate the electric floor suction port and two conductors for remote control. There is a problem in that when such a large number of conductive wires are provided, the operability of the vacuum cleaner deteriorates. Additionally, an expensive low-voltage circuit is required for remote control, which is a factor that hinders cost reduction.

In view of the above points, it is an object of the present invention to provide a vacuum cleaner that requires only two conductors from the vacuum cleaner body to the hand switch, and that can control the speed of an electric blower without using an expensive low-voltage circuit. With the goal.

An embodiment of the present invention will be described based on the accompanying drawings.

- When fixed, 1 is the main body of the vacuum cleaner, which has an electric blower 2 built-in, a conductive hose 3 is electrically connected, and a tip pipe 4 is provided with a hand switch 6.

6 is a cord connected to the electric floor suction lower, which is attached along the extension pipe 8.

9 is a switch pedal for turning the power on and off. To explain the electric circuit, 1o is a power source, which is turned on and off by a main body switch 11. The speed of the electric blower 2 is controlled by a thyristor 12. Resistor R1 in parallel with electric blower 2
, and the electric floor suction motor 13 are connected, and by switching the hand switch 5, the switch S1 is directly connected, and the switch S2 is connected to the diode D1. Power supply 1o via resistor R3
is connected to. Further, a bidirectional three-terminal controlled rectifier T1 is arranged in parallel with the resistor R1, and this is switched by a Zener diode -θ trigger facing the resistor R2 in series. In addition, a capacitor C1 is connected in parallel to the resistor R1.
A parallel circuit of the switch 14 and the capacitor C1 is connected.
The potential charged in the thyristor 12 is passed through the amplifier 16.
is transmitted to. Okay, switch 14 and main body switch 11.
are mechanically linked.

They are connected so that when the switch pedal 9 is operated, the on/off state is reversed. A volume 16 adjusts the initial setting input of the control circuit such as the amplifier 15.

In the above configuration, the present switch 11 and the hand switch 6
When the switch S1 is turned on, the electric blower 2 rotates, and if the set voltage of the Zener diode T2 is set to nearly half the rated voltage of the power supply 1o, %lIf? r'lk
Due to the switching of Chiryo T1, the current flows bypassing the resistor R1, so that the rated voltage is applied to the motor 13, and normal cleaning can be performed.

Next, when changing the rotation speed of the electric blower 2, do as follows. That is, switch S instead of switch S1
2, the diode D1. The voltage flowing here becomes less than half of the rated voltage through the resistor R3, and the voltage flowing here becomes less than half of the rated voltage.
ff 17 ; Li penalty T1 is turned off, voltage is applied to resistor R1, and the potential is charged to capacitor C1,
At the same time, the thyristor 12 is controlled via the amplifier 15. While the switch s2 is on, the rotation of the electric blower 2 gradually increases, so when the desired rotation speed is reached, the hand switch 6 is changed from switch S2 to switch S1 to clean at the desired speed. Can be done.

Now, when the main body switch 11 is turned off after cleaning, the switch 14 is turned on at the same time, and the charge in the capacitor C1 is discharged. Therefore, the next time the power is turned on, it can start again from the speed set by the polygon 16.

As described above, according to the present invention, the speed control of the electric blower in the vacuum cleaner body can be performed using two conductive wires, and can be performed entirely by an electronic circuit without using a broken low-voltage transformer, etc., thereby improving its reliability. , extremely durable, and since the main unit switch and capacitor discharge switch are linked, the speed of the electric blower is automatically reset when the main unit switch is turned off, and cleaning is always performed at the same set speed when starting cleaning. be able to.

[Brief explanation of drawings]

FIG. 1 is an external perspective view of a vacuum cleaner showing an embodiment of the present invention. FIG. 2 is an electric circuit diagram of the vacuum cleaner. 2... Electric blower, 5... Hand/main switch, 11... Body switch, 12... River/thyristor, 14... Switch, 15... ...Amplifier, T1...Bidirectional three-terminal control rectifier,
R,, R2...Resistor, cl...River/Capacitor.

Claims (1)

[Claims] A resistor and a bidirectional three-terminal controlled rectifier are arranged in parallel, the rectifier having a circuit triggered by a Zener diode facing the resistor in series, and a capacitor and a switch connected in parallel. , the resistance in parallel with the rectifying element is connected to one side through the main body switch, and the other side is connected to the resistance through the main body switch.
A circuit is configured such that a hand switch is connected to a power source via a diode or a resistor, and a signal is given to a thyristor that controls the rotational speed of the electric blower via an indication of the capacitor potential or an amplifier, and the switch and the main body switch are connected. A vacuum cleaner that is linked so that its importance is reversed.