JPH01166736A - Electric cleaner - Google Patents

Abstract

PURPOSE: To automatically adjust the number of revolution of a motor for rotary brush drive to reduce damage on a carpet, by connecting a rectifying diode to the motor for rotary brush drive with a rectifying diode to make half-wave rectification of an AC power source in series and an electromagnetic relay to close on receiving a dust detecting signal from a dust detecting part with the rectifying diode in parallel. CONSTITUTION: When dust is detected at a dust detecting device 15 by connecting a power source 12 to rotate an air blowing motor 11, a dust detecting signal is transmitted from a dust discriminating circuit 16 to a phase control circuit 14 and a continuity angle of a directional thyristor 13 is displaced to increase the number of revolution of the air blowing motor 11 is increased for a prescribed time. When a switch is closed, a rotary brush drive motor 17 is driven, and when no dust is detected by the dust detecting device 15, half-wave rectifying of the AC power source is carried out by a rectifying diode 19 to reduce the number of revolution of the rotary brush drive motor 17 to a half. When dust is detected by the dust detecting device 15, the contact point of an electromagnetic relay 20 is closed to supply all wave of AC to the rotary brush drive motor 17 to make high speed operation for a prescribed time, and then the motor returns to the original condition and the rotary brush makes seeping out dust in a carpet.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a vacuum cleaner for domestic or industrial use.

(Conventional technology) In recent years, as people's lifestyles have become more Westernized, the use of long-pile carpet on the floors of Western-style rooms has become popular. As a vacuum cleaner, for example,
At the dust suction port of the floor nozzle, an electric rotating brush is installed to scrape out dust that gets mixed in with the nap of the carpet, and a dust detection device is installed near the suction port. There is a known device that detects the dust sucked in by a vacuum cleaner and automatically increases or decreases the rotational speed of a suction blower motor depending on the amount of dust.

In a conventional vacuum cleaner with the above configuration,
The blower motor, the motor for driving the rotating brush, and the dust detection device had a circuit configuration as shown in FIG. 2, for example. In Figure 2, the blower motor (1) is connected to an AC power source (
When connected to a commercial power source (2), this AC power source (2) and bidirectional thyristor (3) form a series circuit.
A phase control circuit (4) is inserted in parallel into this series circuit. The phase control circuit (4) is also connected to the gate of the bidirectional thyristor (3), and the AC power source (2) is controlled by the gate signal output from the same phase control circuit (4) to the bidirectional thyristor (3). By changing the conduction angle, the rotational speed of the blower motor (+) is changed. Further, the dust detection device (5) is connected to a dust discrimination circuit (6) for receiving the output from the device (5) and determining whether or not the sucked object is dust. It is connected to the phase control circuit (4) via this dust discrimination circuit (6). Further, a switch (8) for opening and closing the rotary brush driving electric motor (7) is connected in series.

In the conventional configuration described above, when the vacuum cleaner is connected to the commercial power source (2), the rotational drive of the blower motor (1) is started, and at this point, dust is detected by the dust detection device (5). Then, a dust detection signal is sent from the dust discrimination circuit (6) to the phase control circuit (4), which changes the conduction angle of the bidirectional thyristor (3) and keeps the rotation speed of the blower motor (1) constant. The time (about several seconds) increases. On the other hand, the rotary brush driving electric motor (7) starts driving by closing the switch (8), and as a result, the rotary brush scrapes out the dust mixed in in the nap of the carpet.

(Problems to be Solved by the Invention) However, in the conventional configuration as described above, although the rotation speed of the blower motor (1) is automatically changed depending on the lack of dust, the rotating brush drive motor (6) is It always operates at a constant rotation, and this means that there is little dust (even if high-speed rotation of the rotating brush is not required), it is unusual (because it rotates at high speed, the rotation noise of the rotating brush is large, and There were problems such as damage to the carpet due to the rubbing of the brush.

The present invention has been made in view of the above-mentioned conventional problems.
To provide a vacuum cleaner which can operate quietly by automatically adjusting the rotational speed of a rotating brush driving electric motor, and which does not damage the carpet on the surface to be cleaned.

(Means for Solving the Problems) In order to achieve the above object, the vacuum cleaner of the present invention includes: a blower motor for sucking dust; a dust detection device for detecting dust sucked by the blower motor; and a motor for driving a rotating brush provided at the dust suction port, a rectifier diode for performing half-wave rectification of AC power is connected in series to the motor for driving the rotating brush, and a rectifier diode for performing half-wave rectification of AC power is connected to the rectifier diode. It consists of electromagnetic relays connected in parallel that close when receiving a dust detection signal from the device.

(Function) According to the present invention having configuration E, when the dust detection device detects dust in the intake air during suction by the blower motor, the electromagnetic relay closes and the rectifier diode is short-circuited.
All branches of the alternating current power supply are supplied to the rotary brush driving electric motor, which rotates at a predetermined number of rotations at a high speed to vigorously scrape out, for example, dust that has gotten into the napping of the carpet.

In addition, when dust is not detected by the dust detection device, the electromagnetic relay is open, so the rectifier diode performs half-wave rectification of the AC power supply, and the rotation speed of the rotating brush drive motor is reduced to the normal rotation speed. It will rotate at a low speed of about 1/2 the rotation speed. Therefore, the dust detection device rotates at high speed only when it detects dust, and when it does not detect dust, it rotates at a high speed of about 1/2.
Since the rotation speed is 2, quiet operation is achieved with F+J capability, and there is less damage to the carpet.

(Example) Hereinafter, an example of the present invention will be described in detail based on FIG. In Figure 1, (11) is a blower motor for dust suction, and when connected to an AC power source (commercial power source) (12), a series circuit is formed between this AC power source (12) and a bidirectional thyristor (13). A phase control circuit (14) is inserted in parallel in this series circuit.
) is also connected to the gate of the bidirectional thyristor (13), and the AC power source (12) is connected to the gate signal of the bidirectional thyristor (13) from the in-phase control circuit (14).
) is changed to change the rotational speed of the blower motor (If).

Further, (15) is a dust detection device that detects dust sucked by the blower motor (II), and receives the output of this device (15) to determine whether or not the sucked object is dust. A discrimination circuit (1B) is connected, and the phase control circuit (14) is connected via this dust discrimination circuit (16).

Historically, (+7) is a rotary plan drive motor installed at the dust suction port, and a switch (17) is used to open and close the motor (17).
18) are connected in series.

The rotating brush driving electric motor (I7) and the AC power supply (I2)
), a rectifier diode (19) for performing half-wave rectification of this AC power source (12) is inserted in series.

Further, an electromagnetic relay (20) that closes when receiving a dust detection signal from the dust detection device (15) is connected in parallel to the rectifier diode (19).

Next, to explain the operation of the above configuration, first, when the vacuum cleaner is connected to the commercial power supply (I2), the blower motor (11)
starts rotating, and at this point the dust detection device (15
), a dust detection signal is sent from the dust discrimination circuit (I6) to the phase control circuit (I4), which displaces the conduction angle of the bidirectional thyristor (13), causing the blower motor ( 11) rotation speed is - for a certain period of time (about a few seconds)
It will increase.

On the other hand, the switch (I8
), the rotary brush drive electric motor (17) starts to drive, but in this case, if the dust detection device (15) does not detect dust, the rectifier diode (19) turns off the AC power source (12). Half-wave rectification is performed, and only about half the power is supplied as in full-wave supply, and therefore the rotational speed of the rotary brush drive motor (17) is also about half.

After this, when dust is detected by the dust detection device (15), the contacts of the electromagnetic relay (20) are closed, both ends of the rectifier diode (19) are short-circuited, and the rotary brush drive electric motor (17) is closed. is supplied with a full wave of alternating current, rotates at high speed, and returns to its original state after a predetermined time (about a few seconds), similar to the blower motor (11), and the rotating brush scrapes out the dust that has gotten into the nap of the carpet. This is what we do.

According to this embodiment configured and operated as described above,
By increasing or decreasing the rotation speed of the rotating brush depending on the presence or absence of dust,
It is possible to use a vacuum cleaner that is quiet and does not damage carpets in dust-free areas.

(Effects of the Invention) As explained above, the vacuum cleaner of the present invention includes a blower motor for sucking dust, a dust detection device for detecting dust sucked by the blower motor, and a rotating A rectifier diode for half-wave rectification of the AC power source is inserted in series between the rotary brush drive motor and the AC power source, and the dust detection device is connected to the rectifier diode. Since an electromagnetic relay that closes when receiving a dust detection signal is connected in parallel, when dust is mixed in the surface to be cleaned such as carpet, it is possible to scrape out the dust with high efficiency. In addition, on a dust-free surface to be cleaned, the cleaner can be operated quietly and has the remarkable effect of being able to clean the carpet without damaging it.

[Brief explanation of the drawing]

FIG. 1 is an electric circuit diagram of an embodiment of the present invention, and FIG. 2 is an electric circuit diagram of a conventional example. (It)...Blower motor, (12)...AC power supply,
(15)... Dust detection device, (17)... Rotating brush drive motor, (19)... Rectifier diode, (20
)...Electromagnetic relay.

Claims (1)

[Claims] A blower motor for sucking dust, a dust detection device for detecting dust sucked by the blower motor, and a motor for driving a rotary brush provided at a dust suction port are provided, and the rotary brush drive motor is equipped with an AC A vacuum cleaner characterized in that a rectifier diode that performs half-wave rectification of a power source is connected in series, and an electromagnetic relay that closes when receiving a dust detection signal from the dust detection device is connected in parallel to the rectifier diode. Machine.