JPH0568662A - Driving controller of vacuum cleaner - Google Patents

Abstract

PURPOSE:To provide the driving controller of a vacuum cleaner which can utilize effectively energy by executing power-down of an input of an air blower motor to a prescribed value, in the case a moving speed of a brush part exceeds a prescribed speed, or it is stopped. CONSTITUTION:A moving distance of a brush part is converted to the number of pulses by a brush movement sensor 23 and detected. By a signal from the brush movement sensor 23, a moving speed of the brush part is calculated by an arithmetic means 25. Based on the moving speed of the brush part calculated by the arithmetic means 25, an air blower motor 8 is subjected to driving control. Also, in the case the moving speed of the brush part exceeds a prescribed speed, or it is stopped, it is operated by executing power-down of an input of the air blower motor 8 to a prescribed value.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drive control device for an electric vacuum cleaner used in general households.

[0002]

2. Description of the Related Art FIG. 8 shows, for example, Japanese Patent Laid-Open No. 2-243125.
It is a block diagram which shows the whole structure of the conventional vacuum cleaner described in the publication. This vacuum cleaner is provided inside the brush unit 1, is connected to the AC power supply E, and rotates the voltage of the AC power supply E. A power supply control element (triac) 3 supplied to the brush motor 2, a control signal generation circuit 6 that controls the power supply control element 3 by receiving an output of a rotation sensor 5 that detects the rotation of the wheels 4, and a rotating brush motor from an AC power supply E. 2 is equipped with a current sensor 7 for detecting the current supplied to it, and a power supply control element (triac) 9 for controlling the voltage of the AC power supply E and supplying it to the blower motor 8 in the main body, and the current sensor 7 and the hand. A control signal generation circuit 11 for controlling the power supply control element 9 in response to an output from the control unit 10 is provided.

Next, the operation will be described.

When the brush portion 1 comes into contact with the cleaning surface and the user moves the brush portion 1, the wheels 4 rotate, whereby the rotation sensor 5 outputs a signal to the control signal generating circuit 6.

The control signal generating circuit 6 is
The drive signal is output to the power supply control element 3 in response to the output of the rotation sensor 5, and the power supply control element 3 receives the drive signal and changes the voltage of the AC power supply E to the rotary brush motor 2.
Supply to.

As a result, the rotary brush motor 2 rotates and the power brush rotates.

Then, the current supplied from the AC power source E to the rotary brush motor 2 is detected by the current sensor 7,
When the output of the current sensor 7 is input to the control signal generation circuit 11, the control signal generation circuit 11 outputs a drive signal to the power supply control element (triac) 9.

Further, the power supply control element (triac) 9 drives the blower motor 8 at the rotation speed set by the hand control unit 10.

Further, when the brush portion 1 is stopped on the cleaning surface, the wheels 4 are stopped, so that the output of the rotation sensor 5 is stopped, and the stop of the output of the rotation sensor 5 causes the control signal generating circuit 6 to operate for a predetermined time ( If there is no signal from the rotation sensor 5 within 5 to 15 seconds), the drive signal to the power supply control element 3 is stopped.

As a result, the power supply control element 3 stops the output to the rotary brush motor 2, and the control signal generation circuit 11 causes the power supply control element (triac).
The drive signal to 9 is stopped, and the blower motor 8 is stopped.

[0011]

The conventional drive control device for the electric vacuum cleaner is constructed as described above, and the brush unit 1 is used.
Since the blower motor 8 is turned ON / OFF by moving / stopping the blower, the blower motor 8 cannot maintain smooth rotation,
There is a problem in that the mechanical system of the blower motor 8 is easily worn due to increased friction due to vibrations at the time of starting and stopping, and the life of the blower motor 8 is shortened. Further, since a large current flows through the blower motor 8 at the time of start-up, if the blower motor 8 repeatedly starts and stops, it consumes more electric power than when the blower motor 8 rotates smoothly, resulting in poor energy efficiency. was there.

Further, if the moving speed V of the brush section 1 becomes very high, the dust collection efficiency becomes extremely poor, but the blower motor 8 is turned ON / OFF according to the movement / stop of the brush section 1.
Since the blower motor 8 is only turned off, the blower motor 8 is operated with the power manually set by the operator, and from this point as well, there is a problem in that the energy utilization efficiency is deteriorated.

The present invention has been made in order to solve the above problems, and wear of the mechanical system of the motor when the moving speed of the brush portion exceeds a predetermined speed or when the brush stops. It is an object of the present invention to provide a drive control device for an electric vacuum cleaner that prevents the occurrence of the above-mentioned problem, extends the life of the device, enhances the energy efficiency, and effectively uses the energy.

[0014]

A drive control device for an electric vacuum cleaner according to the present invention is connected to a cleaner body having a blower motor for generating a suction force and a tip of a hose connected to the cleaner body. And a brush part that has been removed. Further, a wheel that rotates with the movement of the brush unit, a brush movement sensor that converts the rotation of the wheel into a pulse number for detection, a calculation unit that calculates the movement speed of the brush unit based on a signal from the brush movement sensor, and a calculation unit. And a drive control means for driving and controlling the blower motor based on the moving speed of the brush portion calculated by the means, wherein the drive control means controls the moving speed of the brush portion when the moving speed of the brush portion changes from a normal state. Accordingly, the input of the blower motor is powered down to a predetermined value to operate the blower motor.

Further, the drive control means powers down the input of the blower motor to a predetermined value when the moving speed of the brush portion exceeds a predetermined speed.

Further, the drive control means is configured to drive and control the blower motor at the lowest level within the output control range when the brush section is stopped.

[0017]

In the drive controller for the electric vacuum cleaner according to the present invention, the rotation of the wheel that rotates with the movement of the brush connected to the tip of the hose connected to the cleaner body is converted into the number of pulses by the brush movement sensor. Then, the moving speed of the brush portion is calculated by the calculating means based on the signal from the brush moving sensor, and the drive control means drives and controls the blower motor based on the moving speed of the brush portion calculated by the calculating means. Then, when the moving speed of the brush portion changes from the normal state, the drive control means powers down the input of the blower motor to a predetermined value according to the moving speed of the brush portion to operate the blower motor.

For example, when the moving speed of the brush portion exceeds a predetermined speed, the operation of the blower motor is continued with the input of the blower motor being powered down to a predetermined value.

When the brush portion is stopped, the drive control means keeps the blower motor input at the lowest level within the output control range and continues the blower motor operation.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, the vacuum cleaner includes a blower motor 8 having a variable input power in a main body portion 12,
The blower motor 8 has a triac 14 as a power supply control element for controlling the voltage of the commercial power supply 13 to a predetermined voltage.
The electric power is supplied by.

The hand control unit 15 is provided with a constant voltage power supply circuit 16 for converting the voltage of the power from the AC power supply 13 into a predetermined value so that the constant voltage power supply circuit 16 supplies power to a microcomputer or the like. It has become.

Further, the hand control unit 15 has a CPU 17 for controlling the operation of each unit.
Includes a BCR drive circuit 1 for controlling the triac 14.
8, a display 19, a switch 20, a BCR drive circuit 22 for controlling a triac 21 as a power supply control element for controlling the voltage to the brush unit 1 to a predetermined voltage, and a terminal a are connected.

A brush movement sensor 23 for detecting the movement of the brush portion 1 is connected to the terminal a through the terminal b, and the brush motor 24 whose power source is controlled by the triac 21 is connected to the brush portion 1. Are arranged.

As shown in detail in FIG. 2, the CPU 17 has a calculating means 25 for calculating the moving speed V or the moving distance L of the brush portion 1 based on a signal from the brush moving sensor 23. Is connected to a drive control means 26 for driving and controlling the blower motor 8 based on the moving speed V or the moving distance L of the brush part 1 calculated by the calculating means 25, and the moving speed of the brush part 1 calculated by the calculating means 25. A judging means 27 is connected to separate the moving distance of each stroke of the brush portion from the change of V.

The drive control means 26 is configured to control the brush motor 24 so as to drive the power brush when the brush movement sensor 23 moves the brush portion 1.

On the other hand, as shown in detail in FIG. 3, the brush portion 1 is provided with two front wheels 29 and two rear wheels 30 for facilitating the movement of the brush body 28. On the other hand, the rear wheel 30 is provided with a brush movement sensor 23 that detects the movement of the brush portion 1 by detecting the rotation of the wheel 30.

Further, the brush motor 24 is provided in the brush unit 1.
And the power brush 31 is rotatably supported. A belt 32 is wound around the shafts of the power brush 31 and the brush motor 24, so that the driving force of the brush motor 24 is transmitted to the power brush 31.

Further, the brush movement sensor 23 is shown in FIG.
As shown in (a), a rotary shaft 34 rotatably supported by a bearing 33 is provided in a groove 28a of the brush main body 28, and the rotary shaft 34 has a rear wheel 30 that rotates in contact with the floor surface. Is fixed.

The slit disc 35 of FIG. 4B having a plurality of light shielding plates 35a is fixed to one end of the rotary shaft 34, and the slit disc 3 faces the slit disc 35.
A transmission type light shield plate detection sensor 36 that is turned on or off by the light shield plate 35a of No. 5 is arranged.

Next, the operation of this embodiment will be described.

When the brush portion 1 comes into contact with the cleaning surface and the user moves the brush portion 1, the wheels 30 rotate, whereby the brush movement sensor 23 sends a pulse signal (see FIG. 5) to C
It is output to the calculation means 25 of the PU 17.

Then, the calculating means 25 uses the pulse count number of the output of the brush movement sensor 23 in 100 msec to move the brush portion 1 at a predetermined speed of 100 msec.
Is calculated and output to the drive control means 26.

Then, the drive control means 26, based on the moving speed V of the brush portion 1 calculated by the calculating means 25, has a relationship between the moving speed V stored in advance in the memory 26a and the input of the blower motor 8 (FIG. 6). The blower motor 8 is driven and controlled in accordance with the reference).

At this time, depending on the type of the floor surface, as shown in FIG. 7, the amount of dust collection changes with speed, and as the moving speed V increases, the amount of dust collection decreases, so the input of the blower motor 8 is increased. Although the amount of dust collection is made constant, that is, the cleaning efficiency is made constant, the moving speed V of the brush unit 1 is equal to the predetermined speed V.
When the speed is higher than H, the dust collection efficiency is extremely deteriorated, so the drive control means 26 sets the input of the blower motor 8 to a predetermined value (for example, 6 of the input value of the blower motor 8 at a predetermined speed VH).
Power efficiency is reduced to 0%) to improve energy utilization efficiency.

The drive control means 26 drives the brush motor 24 to rotate the power brush 31 when the brush unit 1 is moving.

Next, another embodiment of the present invention will be described.

When the brush portion 1 comes into contact with the cleaning surface and the user moves the brush portion 1, the rear wheel 30 rotates, which causes the brush movement sensor 23 to output a pulse signal (see FIG. 5) to the calculating means of the CPU 17. Output to 25.

Then, the calculating means 25 calculates the moving speed V of the brush unit 1 for every 100 m / sec of a predetermined length by the pulse count number of 100 m / sec of the output of the brush moving sensor 23.

Further, the judging means 27 uses a pulse signal (see FIG. 5).
The sparse portion of the pattern of (1) is detected, it is determined that one stroke of the brush unit 1 is between the sparse portions, and the delimiter position of the stroke is output to the calculating means 25.

Then, the calculation means 25 calculates the movement distance L for each stroke and outputs it to the drive control means 26.

Further, the drive control means 26 is the calculation means 2
5 based on the moving speed V of the brush unit 1 calculated in accordance with the relationship between the moving speed V stored in the memory 26a and the input of the blower motor 8 (see FIG. 8).
Drive control.

When the brush section 1 is stopped, the drive control means 26 sets the input power of the blower motor 8 to the minimum level PL (see FIG. 8).

Further, the drive control means 26 drives the brush motor 24 to rotate the power brush 31 when the brush unit 1 is moving.

[0045]

As described above, according to the present invention, the rotation of the wheel that rotates with the movement of the brush portion connected to the tip of the hose portion connected to the cleaner body is pulsed by the brush movement sensor. Converted into a number and detected, the moving speed of the brush portion is calculated by the calculating means based on the signal from the brush moving sensor, and the drive control means drives and controls the blower motor based on the moving speed of the brush portion calculated by the calculating means, When the moving speed of the brush part changes from the normal state, the moving speed of the brush part is equal to or higher than the predetermined speed due to the configuration in which the input of the blower motor is powered down to a predetermined value according to the moving speed of the brush part In this case, proper operation is performed to prevent wear of the mechanical system of the motor to prolong its life, improve energy efficiency, and save energy. Available.

Further, since the input of the blower motor is set to the lowest level within the output control range when the brush portion is stopped, it is possible to prevent the blower motor from being repeatedly started and stopped, and extend the life of the blower motor. Can also,
When the movement of the brush part is stopped, the brush part smoothly rotates at the lowest level within the output control range, and energy efficiency can be improved.

[Brief description of drawings]

FIG. 1 is a circuit diagram showing a drive control circuit of an electric vacuum cleaner according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a CPU according to an embodiment of the present invention.

FIG. 3 is a cross-sectional view showing a configuration of a brush unit according to an embodiment of the present invention.

FIG. 4 is a cross-sectional view showing a configuration of a brush movement sensor according to an embodiment of the present invention, where (a) shows the entire sensor and (b) shows a slit disk.

FIG. 5 is a diagram showing a pulse pattern of a brush movement sensor according to an embodiment of the present invention.

FIG. 6 is a diagram showing a relationship between a moving speed of a brush portion and an input of a blower motor according to an embodiment of the invention of claim 1;

FIG. 7 is a diagram showing a relationship between a moving speed of a brush unit and a dust collection amount according to an embodiment of the present invention.

FIG. 8 is a diagram showing a relationship between a moving speed of a brush unit and a dust collection amount according to another embodiment of the present invention.

FIG. 9 is a circuit diagram showing a drive control circuit of a conventional electric vacuum cleaner.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Brush part 8 Blower motor 12 Main body part 23 Brush movement sensor 25 Calculation means 26 Drive control means 30 Rear wheel

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Yutaka Takahashi 1728 Omaeda, Omaeda, Ozono-gun, Saitama Prefecture 1728 Mitsubishi Electric Home Equipment Co., Ltd. (72) Hiroshi Taguchi 1728 Omaeda, Omaeda, Oza-gun, Saitama Prefecture Mitsubishi Electric Home Equipment Co., Ltd. (72) Inventor Takahiro Yanagida 1728 Omaeda, Ozono, Hanazono-gun, Saitama Prefecture 1 Mitsubishi Electric Home Equipment Co., Ltd. (72) Koji Hasu 1728 1728, Omaeda, Hanazono-cho, Saitama-gun Mitsubishi Electric Home Equipment Co., Ltd. (72) Inventor Masafumi Nagata 2-14-40 Ofuna, Kamakura-shi, Kanagawa Mitsubishi Electric Corporation Living Systems Laboratory (72) Inventor Yosuke Otsuka 2--14, Ofuna, Kamakura, Kanagawa No.40 Mitsubishi Electric Corporation Life Systems Research Center

Claims (3)

[Claims] 1. A drive controller for an electric vacuum cleaner, comprising: a cleaner body containing a blower motor that generates suction force; and a brush part connected to a tip of a hose part connected to the cleaner body. Wheel that rotates with the movement of the brush portion, a brush movement sensor that converts the rotation of the wheel into a pulse number for detection, a calculation unit that calculates the movement speed of the brush unit based on the signal from the brush movement sensor, and a calculation unit. And a drive control means for driving and controlling the blower motor based on the moving speed of the brush portion, wherein the drive control means is a blower according to the moving speed of the brush portion when the moving speed of the brush portion changes from a normal state. A drive control device for an electric vacuum cleaner, which is configured to operate a blower motor by powering down an input of the motor to a predetermined value. 2. A drive control device for an electric vacuum cleaner, comprising: a cleaner body containing a blower motor that generates suction force; and a brush part connected to the tip of a hose part connected to the cleaner body. Wheel that rotates with the movement of the brush portion, a brush movement sensor that converts the rotation of the wheel into a pulse number for detection, a calculation unit that calculates the movement speed of the brush unit based on the signal from the brush movement sensor, and a calculation unit. And a drive control unit for driving and controlling the blower motor based on the moving speed of the brush unit, wherein the drive control unit powers the input of the blower motor to a predetermined value when the moving speed of the brush unit exceeds a predetermined speed. A drive control device for an electric vacuum cleaner characterized by being down. 3. A drive control device for an electric vacuum cleaner, comprising: a cleaner body containing a blower motor that generates a suction force; and a brush part connected to a tip of a hose part connected to the cleaner body. Wheel that rotates with the movement of the brush portion, a brush movement sensor that converts the rotation of the wheel into a pulse number for detection, a calculation unit that calculates the movement speed of the brush unit based on the signal from the brush movement sensor, and a calculation unit. The drive control means for driving and controlling the blower motor based on the moving speed of the brush portion, wherein the drive control means controls the drive of the blower motor at the lowest level within the output control range when the brush portion is stopped. A drive control device for a characteristic vacuum cleaner.