JPH05261045A - Driving controller for vacuum cleaner - Google Patents

Abstract

PURPOSE:To control to a prescribed sound pressure level in which a wind-cut sound at the time of operation or a driving sound or a driving sound of a motor does not cause a user anxiety. CONSTITUTION:The driving controller is constituted by providing a sound pressure detecting part 3 for detecting sound pressure, and a control part 4 for controlling the number of revolution of a motor 2 in accordance with a level variation of the sound pressure detected by this sound pressure detecting part 3. Or, by the constitution provided with a sound pressure detecting part 12 for detecting sound pressure and a control part 13 for controlling an output of a sound output part 14 in a roughly opposite phase to a variation of the sound pressure detected by this sound pressure detecting part 12, a speed command value sent to the control part 4 is corrected in accordance with a variation of a sound pressure level, or an output is executed from the sound pressure sound output part 14 of a sound pressure level of a variation pattern of an opposite phase to a variation of the sound pressure level, and the sound pressure level can be made constant.

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 a vacuum cleaner which controls the sound pressure of a variable speed vacuum cleaner to a constant level.

[0002]

2. Description of the Related Art A conventional vacuum cleaner uses a trigger element such as a triac to drive the triac,
A method of applying a single-phase alternating current to a motor driven by direct current by applying alternating current called a universal motor to drive the motor has been mainly performed. The drive pattern was performed by repeating on / off of the rotation speed and stop determined by the commercial power supply and the commercial frequency. Further, in order to variably control the rotation speed by this electric motor, average voltage control by a phase control method has been conventionally performed. And the driving is strong, standard,
It was due to weak switching.

A conventional drive controller for an electric vacuum cleaner is shown in FIG.
As shown in, the grip portion 20 of the suction tool 6 of the electric vacuum cleaner 15 is shown.
The automatic operation power control of the electric motor 16 is performed by the electric motor control unit 18 and the drive unit 17 by the optimum power according to the amount of dust detected by the dust detection unit 19 disposed in the above. 7 is a hose.

[0004]

However, in the above-mentioned conventional configuration, since the drive control is closed loop control,
In particular, there is a problem in that the wind noise during the operation of the electric vacuum cleaner 15 or the driving noise of the electric motor 16 is irregular, which causes a very annoying sound.

The present invention solves the above-mentioned conventional problems, and provides a drive control device for an electric vacuum cleaner, which can be controlled so as not to disturb the wind noise or the driving sound of the electric motor during operation of the electric vacuum cleaner. With the goal.

[0006]

To achieve this object, a drive control device for an electric vacuum cleaner according to the present invention comprises, as a first means, a sound pressure detecting section for detecting sound pressure and a sound pressure detecting section. A configuration is provided that includes a control unit that controls the number of rotations of the electric motor according to a change in the detected sound pressure level, and a sound pressure detection unit that detects the sound pressure as the second means, and this sound pressure detection unit. The configuration is such that a control unit for controlling the output of the sound output unit is provided in a phase approximately opposite to the change in the sound pressure detected by.

[0007]

In the first means, the speed command value sent to the control unit is corrected in accordance with the change in the sound pressure level so that the sound pressure level becomes constant, and in the second means, the sound pressure level is changed. In accordance with the level change, the sound output section outputs a sound of a sound pressure level having a change pattern of a phase opposite to the change of the sound pressure level to make the sound pressure level constant.

[0008]

【Example】

(Embodiment 1) An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 is an electric vacuum cleaner driven by an electric motor 2, 3 is a sound pressure detecting section arranged at an appropriate position of the electric vacuum cleaner 1 for detecting sound pressure, and 4 is a sound pressure detecting section. A controller for controlling the number of revolutions of the electric motor 2 in accordance with a change in the level of the sound pressure detected at 3, a driving unit of the electric motor 2 controlled by the controller 4, 6 a suction tool, and 7 a hose.

With respect to the drive control device for the electric vacuum cleaner including the above-described components, the relationship and operation of the components will be described.

As shown in FIG. 2A, the electric motor is driven by the control unit 4 and the drive unit 5 in accordance with the pattern of the level change of the sound pressure detected by the sound pressure detection unit 3 during the operation of the electric vacuum cleaner 1. FIG. 2B shows an operation pattern in which the rotational speed of 2 is controlled.

As shown in the figure, when the sound pressure level output is below the average value indicated by the alternate long and short dash line, the rotation speed of the electric motor 2 is increased, and when above the average value, the rotation speed of the electric motor 2 is decreased. Then, the sound pressure level can be made constant as shown in FIG. 2C by raising or lowering the number of revolutions according to the change in the sound pressure level.

As described above, according to the present embodiment, the closed-loop drive control makes it possible to control the wind noise or the drive noise of the electric motor 2 when the electric vacuum cleaner 1 is in operation.

(Second Embodiment) A second embodiment of the present invention will be described below with reference to the drawings.

In FIG. 3, reference numeral 8 is an electric vacuum cleaner driven by an electric motor 11, 12 is a sound pressure detecting section arranged at an appropriate position of the electric vacuum cleaner 8 for detecting sound pressure, and 13 is this sound pressure detection. A control unit that controls the output of the sound output unit 14 in a phase substantially opposite to the change in the sound pressure detected by the unit 12, and 9 is the motor control unit 10.
Is a drive unit of the electric motor 11 controlled by, 6 is a suction tool, and 7 is a hose.

With respect to the drive control device for the electric vacuum cleaner including the above-mentioned components, the relationship and operation of the components will be described.

As shown in FIG. 4A, the sound pressure output of the sound output unit 14 is changed according to the level change pattern of the sound pressure detected by the sound pressure detection unit 12 during the operation of the vacuum cleaner 8. The controlled control pattern is shown in FIG.

As shown in the figure, when the sound pressure level output is below the average value shown by the alternate long and short dash line, the sound pressure from the sound output section 14 is increased, and when it is above the average value, the sound output section is increased. As shown in FIG. 4C, the sound pressure level from the sound output unit 14 is raised or lowered according to the pattern of the sound pressure level change so that the sound pressure level from the sound pressure level from the sound pressure level from 14 is lowered. Can be constant.

As described above, according to the present embodiment, it is possible to control the current open-loop drive control as it is, without disturbing the wind noise or the drive noise of the electric motor 11, especially when the electric vacuum cleaner 8 is in operation.

[0020]

As is apparent from the above description of the embodiments, the present invention responds to a sound pressure detecting section for detecting sound pressure and a level change of the sound pressure detected by the sound pressure detecting section. A configuration including a control unit that controls the rotation speed of the electric motor, a sound pressure detection unit, and a control unit that controls the output of the sound output unit in a phase approximately opposite to the change in the sound pressure detected by the sound pressure detection unit. With the configuration including the above, it is possible to realize an excellent drive control device for an electric vacuum cleaner that can control the wind noise or the driving sound of the electric motor during operation of the electric vacuum cleaner without being bothered.

[Brief description of drawings]

FIG. 1 is a block diagram showing the concept of the configuration of a drive control device for an electric vacuum cleaner according to a first embodiment of the present invention.

FIG. 2 is a graph showing the relationship between the sound pressure of the sound pressure detection unit of the vacuum cleaner drive control device, the rotation speed of the electric motor, and the controlled sound pressure.

FIG. 3 is a block diagram showing the concept of the configuration of a drive control device for an electric vacuum cleaner according to a second embodiment of the present invention.

FIG. 4 is a graph showing the relationship between the sound pressure of the sound pressure detection unit, the sound pressure of the sound output unit, and the controlled sound pressure of the drive control device for the electric vacuum cleaner.

FIG. 5 is an external perspective view including a block diagram showing the concept of the configuration of a drive controller for a conventional electric vacuum cleaner.

[Explanation of symbols]

 2 Electric motor 3 Sound pressure detection unit 4 Control unit

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Akihiro Kitagawa 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (2)

[Claims] 1. An electric vacuum cleaner provided with an electric motor and a dust collecting means, wherein the sound pressure detecting section for detecting sound pressure and the level change of the sound pressure detected by the sound pressure detecting section. A drive control device for an electric vacuum cleaner, comprising a control unit that controls the rotation speed of an electric motor via a drive unit. 2. An electric vacuum cleaner having an electric motor and a dust collecting means, the electric motor control unit controlling the rotation speed of the electric motor via a drive unit, a sound pressure detecting unit detecting sound pressure, and a sound pressure detecting unit. A drive control device for an electric vacuum cleaner, comprising: an output unit; and a control unit that controls an output of the sound output unit in a phase substantially opposite to a change in the sound pressure detected by the sound pressure detection unit.