JP2882010B2 - Electric vacuum cleaner - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum cleaner, and in particular, detects the amount of dust on a floor surface and automatically controls the number of rotations of a rotary brush of a floor suction tool with a rotary brush. Related to vacuum cleaners.

2. Description of the Related Art In recent years, the number of vacuum cleaners having a rotating brush as a floor suction tool has been increasing, and a vacuum cleaner that automatically controls a suction force of a fan motor using a dust sensor or the like has become mainstream. .

Conventionally, this type of vacuum cleaner generally has a configuration as shown in FIGS.

 Hereinafter, this configuration will be described based on a screen.

As shown in the figure, a hose 2 is connected to a vacuum cleaner main body 1, a hand operation unit 3 is provided at the end of the hose 2, and a floor suction tool 4 is further provided. The floor suction device 4 has a configuration in which the rotating brush 5 is rotated by a motor 6 via a belt 19. The light emitting element 7 is provided in the dust passage path such as the hand operation unit 3.
And a dust sensor 17 composed of a light receiving element 8
The current is supplied via 10,20. After the output of the light receiving element 8 is cut off the DC component by the capacitor 11, only the AC component is amplified by the amplifier 12, converted into a pulse signal by the pulse converter 13, and input to the power control circuit 14. The gate terminal of the bidirectional thyristor 15 is connected to the power control circuit 14, and the bidirectional thyristor 15, the AC power supply, and the fan motor 16 are connected.
Are connected in series.

The motor 6 of the rotary brush 5 of the floor suction tool 4 is connected to an AC power supply via a switch 18.

When the dust 9 passes through the dust sensor 17, the amount of light to the light receiving element 8 changes, and the output of the amplifier 12 changes in an analog manner. This change amount is converted into a pulse signal by the pulse converter 13.

That, is output the number of pulse signals corresponding to the throughput of the dust 9, the power control circuit 14, and becomes the set value n number ₁ or more pulses with increasing the suction force of the fan motor 16, n ₁ following pulses Then, the trigger timing of the bidirectional thyristor 15 is controlled so as to reduce the suction force. The rotating brush 5 of the floor suction tool 4 selects rotation or stop by switching the switch 18 by the user.

Problems to be Solved by the Invention In such a conventional vacuum cleaner configuration, even if the suction force of the fan motor 6 is automatically controlled in accordance with the amount of dust, the rotary brush 5 of the floor suction tool 4 can be used. There was a problem that the number of rotations could not be controlled according to the amount of dust on the floor.

The present invention has been made to solve the above-described problem, and has an object to control the number of rotations of the rotating brush 5 of the floor suction tool 4 to an optimum number of rotations according to the amount and type of dust on the floor surface.

Means for Solving the Problems In order to achieve the above object, the vacuum cleaner of the present invention comprises a floor suction tool provided with a rotating brush, and a dust amount detecting means for detecting the amount of dust on the floor surface per unit time. A means for detecting the type of floor surface in response to a plurality of outputs of the dust amount detection means within a predetermined time, wherein the rotary brush is provided in accordance with the outputs of the dust amount detection means and the means for detecting the floor type. Is to control the number of rotations.

Operation With this configuration, the vacuum cleaner of the present invention controls the rotation speed of the rotating brush according to the outputs of the dust amount detection unit and the unit that detects the type of floor surface. The rotation speed is controlled to an optimum value according to the amount and type of dust.

Embodiment Hereinafter, a vacuum cleaner according to an embodiment of the present invention will be described with reference to FIG. 1 to FIG.

As shown in the figure, the dust sensor 21 detects the amount of dust by an optical element provided in a dust passage (not shown).
The dust amount detection unit 22 detects the dust amount per unit time. The comparing and counting means 23 counts and outputs the number of times the amount of dust in the unit time exceeds a predetermined amount within a predetermined time. The outputs of the dust amount detecting means 22 and the comparing and counting means 23 are output by a fuzzy inference device.
Enter 24. The fuzzy inference unit 24 includes a dust amount membership function storage unit 27, a comparison counting membership function storage unit 28, and a dust amount suitability calculating unit 29 for determining the suitability.
And a comparison count adaptability calculating means 30. The rotational speed calculating means 33 compares the output of both the fitness calculating means 29 and 30 with the stored content of the rotating brush inference rule storing means 31. The optimum rotation speed is determined from the rotation speed membership function storage means (hereinafter, simply referred to as rotation speed) 32 of the rotating brush based on the rotation speed. The dust quantity membership function storage means 27, the comparison count membership function storage means 28, and the rotational speed membership function storage means 32 are respectively the membership functions shown in FIGS. 3 (a), (b) and (c). I remember. Further, the rotation speed inference rule storage means 31 stores the rotation speed inference rules shown in Table 1.

The rotation speed calculating means 33 is not shown, but the minimum amount calculation of the antecedent part for inputting the output of the dust amount matching degree calculating means 29 and the comparison count matching degree calculating means 30 and the storage contents of the rotation number inference rule storage means 31 is performed. Means, the consequent part maximum operation means for inputting the output of the antecedent minimum operation means and the storage contents of the rotational speed inference rule storage means 31 and the rotational speed membership function storage means 32, and the consequent part maximum operation And a center-of-gravity calculating means for inputting the output of the means.

The output of the fuzzy inference unit 24 is input to a control unit 25 having a bidirectional thyristor or the like, and controls the rotation speed of the rotating brush motor 26.

The operation of the above configuration will be described.
When the output of 22 is the point A in FIG. 3 (a), among the dust amount membership functions, the "normal" membership function is about 2/3, and the "high" membership function is about 1/3. Weight. When the output of the comparison and counting means 23 is the point B in FIG. 3 (b), the comparison and counting adaptability calculating means 30 similarly performs weighting. Then, the storage contents of the rotational speed inference rule storage means 31 and the two degree of fitness calculation means 29 shown in Table 1
According to the output of 30, the rotation speed calculating means 33 performs weighting of each membership function in the rotation speed membership function storage means 32, determines the rotation speed, and controls the control means 25 to rotate the rotation brush motor 26. Control the number.

According to the vacuum cleaner of the present invention, the number of rotations of the rotary brush is controlled in accordance with the output of the dust amount detection unit and the unit for detecting the type of floor surface, as is apparent from the above description of the embodiment. Therefore, the rotation speed of the rotating brush can be controlled to an optimum rotation speed according to the amount and type of dust on the floor surface.

[Brief description of the drawings]

FIG. 1 is a block diagram of a rotation speed control of a rotary brush of a floor suction device of a vacuum cleaner according to an embodiment of the present invention, FIG. 2 is a block diagram showing a configuration of the fuzzy inference device, and FIG. ~
(C) is a graph showing a membership function stored in a fuzzy inference device for controlling the number of rotations of the rotating brush of the suction tool for the floor, FIG. 4 is a perspective view of a conventional vacuum cleaner, and FIG. FIG. 6 is a cross-sectional view of the dust sensor unit, FIG. 7 is a circuit diagram for controlling the number of rotations of the rotating brush of the floor suction tool, and FIG. 8 is an operation circuit of the rotating brush. FIG. 22: Dust amount detecting means, 23: Comparison counting means, 24: Fuzzy inference device.

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Claims (1)

(57) [Claims] A floor suction device provided with a rotating brush; a dust amount detecting means for detecting a dust amount on the floor surface per unit time; and a plurality of outputs of the dust amount detecting means within a predetermined time. A vacuum cleaner comprising means for detecting the type of floor surface, and controlling the number of revolutions of the rotating brush according to the output of the dust amount detecting means and the means for detecting the type of floor surface.