JPH049129A - Vacuum cleaner - Google Patents

Abstract

PURPOSE:To avoid contact failure in the joint of a hose with the body, by directly driving the gate of a dual directional thyristor connected to the joint of the body and the hose from a controller at hand. CONSTITUTION:The suction force of a fan motor 1, contained in the body 5, sucking dusts or others on a floor is preset by a controller 6 at hand. The controller 6 at hand is connected to the body 5 through a detachable hose 9 having control wires 9a in the inside. And further, the revolution of the fan motor 1 is controlled by the first dual directional thyristor 2 inserted inside the body 5. The gate of the first dual directional thyristor 2 is controlled by the second dual directional thyristor 7 inserted in the hand controller 6. As a result, the contact failure of the joint of the hose and the body is not brought and hence a reliable and inexpensive vacuum cleaner can be supplied.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a vacuum cleaner for domestic use.

Conventionally, in this type of vacuum cleaner, as shown in FIG. The rotation speed of the fan motor 1 was controlled by controlling the fan motor 1 with a low DC voltage and low current through the fan motor 1 and controlling the first bidirectional thyristor 4. 13 in the figure is
A snubber circuit absorbs spark noise generated in the first bidirectional thyristor 14, 15 is a resistance of the second bidirectional thyristor 18, and 20 is a resistance on the signal line.

Problems to be Solved by the Invention In the above configuration, only low voltage and low current are applied to the connection between the main body 12 and the removable hose 16, so oxide films, dirt, and dust generated at the connection may cause poor contact. Wake up,
There was a problem in that the fan motor 1 inside the main body 12 malfunctioned.

In addition, although the control circuit 19 in the hand control unit 17 is driven in a polarized manner, the polarity may change depending on the wiring of the signal line in the hose 16 due to manufacturing reasons, and the second bidirectional thyristor 18 Since the polarity is also determined for the drive, the rectifier 10
was necessary.

The present invention solves these problems, and aims to provide an inexpensive vacuum cleaner that does not cause poor contact between the port and the main body.

Means for Solving the Problems In order to achieve the above object, the present invention includes a fan motor that sucks in dust on the floor, a hand-held operation unit that sets the suction force of the fan motor, and the fan motor. a main body part, a detachable hose that connects the hand control part and the main body part and includes a control line; a first bidirectional thyristor built in the main body part that controls rotation of the fan motor; The first control unit built into the hand control unit
The vacuum cleaner includes a second bidirectional thyristor that controls the gate of the bidirectional thyristor.

Function: The above-mentioned means is such that the gate of the bidirectional thyristor connected to the connecting portion between the main body and the hose is directly driven from the hand-operated portion.

EXAMPLES Hereinafter, examples will be described with reference to the drawings. In FIG. 1, reference numeral 1 denotes a fan motor that sucks in dust and the like from the surface to be cleaned. Reference numeral 2 denotes a first bidirectional sirisk, which controls the rotation of the fan motor 1.

3 is a snubber circuit that absorbs spark noise and the like generated in the first bidirectional thyristor 2. A resistor 4 limits the gate current of the first bidirectional thyristor 2. Reference numeral 5 denotes a main body, which includes a fan motor, a first bidirectional thyristor 2, a snubber circuit 3, and a resistor 4. Reference numeral 6 denotes a hand-held operation unit for setting the suction force of the fan motor l. A second bidirectional thyristor 7 connects the gate of the first bidirectional thyristor 2 to faQa via a resistor 4. Reference numeral 8 denotes a control circuit that drives the second bidirectional thyristor 7 according to the settings of the hand-held operation unit 6. Reference numeral 9 denotes a hose that connects the hand-held operation section 6 and the main body section 5, and guides the dust on the cleaning surface to the main body section 5, where it is contained. Further, the hose 9 can be attached to and detached from the main body portion 5.

The operation of the above configuration will be described. Hand control unit 6
When the rotation speed of the fan motor 1 is set, the control circuit 8 controls the phase of the second bidirectional thyristor 7 in synchronization with the commercial power supply according to the rotation speed. While the second bidirectional thyristor 7 is off, AClooV is applied to the gate circuit of the first bidirectional thyristor 2. Similarly, AClooV is also applied to the contact portion between the hose 9 and the main body portion 5.

While the second bidirectional thyristor 7 is on, a gate current flows to the first bidirectional thyristor 2 through the control line 9ζ in the hose 9 and the resistor 4, and the fan motor 1 is driven.

As described above, in this embodiment, since AClooV is applied to the contact between the hose 9 and the main body 5, the spark generated at the contact immediately after the first bidirectional thyristor 2 is turned on causes the contact to The oxide film and dust will be blown away. Also, since the gate current can be passed with AClooV,
A large current can be secured, and the oxide film and dust on the contacts can also be blown away. Furthermore, since alternating current flows through the hose 9, the polarity does not matter.

Effects of the Invention As described above, the vacuum cleaner of the present invention does not cause poor contact between the hose and the main body, and can provide a highly reliable and inexpensive product, which eliminates the problems of the conventional vacuum cleaner. It is something that is dispelling.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the vacuum cleaner of the present invention, and FIG. 2 is a block diagram showing the configuration of a conventional vacuum cleaner. DESCRIPTION OF SYMBOLS 1... Fan motor, 2... First bidirectional thyristor, 5... Main body part, 6... Hand operation part, 7... Second bidirectional thyristor, 9... Hose.

Claims (1)

[Claims] A fan motor that sucks dust etc. from the floor, a hand control section that sets the suction force of the fan motor, a main body section that houses the fan motor, and a detachable device that connects the hand control section and the main body section. A hose with a built-in control line,
a first bidirectional thyristor built in the main body that controls the rotation of the fan motor; and a second bidirectional thyristor built in the hand control unit that controls the gate of the first bidirectional thyristor. A vacuum cleaner.