JP2956204B2 - Electric vacuum cleaner - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric vacuum cleaner that controls the input (rotation speed) of an electric blower by indexing the type of floor surface to be cleaned and fuzzy inferring it together with the amount of dust.

2. Description of the Related Art In recent years, there has been a demand for a vacuum cleaner to automatically control an input of an electric blower based on a floor surface to be cleaned, an amount of dust, and the like to control a suction force. Conventionally, this type of vacuum cleaner generally has a configuration as shown in FIG. Hereinafter, the configuration will be described.

As shown in the figure, a cleaner body (hereinafter referred to as a body) 1
Has a built-in electric blower 2 and a hose
4. The extension pipe 5 and the suction tool 6 are connected. A hand switch 7 is provided at the end of the hose 4, and the rotation speed of the electric blower 2 disposed in the main body 1 is controlled by operating the hand switch 7.

Problems to be Solved by the Invention In such a conventional vacuum cleaner, a user determines the floor surface to be cleaned, and manually changes the input (the number of revolutions) by operating the hand switch 7 according to the floor surface. The suction force was changed. Therefore, there is a problem that the operation is troublesome.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned conventional problems and to perform processing of an output of a sensor for detecting dust to automatically identify a floor surface and perform fine input control of an electric blower.

Means for Solving the Problems In order to achieve the above object, the present invention provides a sensor for detecting dust passing through a dust passage, a pulse converting means for converting an output of the sensor into a pulse signal, First counting means for counting the number of pulses within a unit time, a plurality of counting means for counting if the count result of the first counting means is equal to or more than a predetermined value, and a fuzzy inference device for determining an input of the electric blower. Wherein the fuzzy inferencer determines the input of the electric blower based on the output of the first counting means and information obtained by indexing the type of the floor surface from the count values of the plurality of counting means having different predetermined values. It is something to do.

Function The present invention can provide an index of the type of the floor surface by the outputs of the plurality of counting means, and the input control of the electric blower according to the floor surface and the amount of dust by the index of the floor surface and the amount of dust. And improve the usability.

Embodiment An embodiment of the present invention will be described below with reference to FIGS. The same components as those in the conventional example are denoted by the same reference numerals, and description thereof is omitted.

As shown in the figure, a sensor 8 has a light emitting diode 10 provided in a dust passage 9 of a hose 4, and a light receiving unit 11 provided in opposition to the light emitting diode 10 to detect a change in the amount of light due to dust 12 passing through the dust passage 9. I am trying to do it. The signal from the light receiving unit 11 is amplified by the amplifying unit 13, the waveform is shaped by the pulse converting unit (pulse converting means) 14, converted into a pulse signal, and input to the microcomputer 15. The microcomputer 15
A first counting means 16 for counting the number of pulses from the pulse conversion unit 14 within a unit time; and a second counting means for counting if the count result of the first counting means 16 is equal to or more than a first predetermined value (for example, 2). Means 17, a third counting means 18 for counting if the count result of the first counting means 16 is equal to or more than a second predetermined value (for example, 3), a fuzzy inference device 19 for determining an input of the electric blower 2, a timer And a unit 20. The output of the microcomputer 15 is input to the phase control circuit 21, and the input of the electric blower 2 is controlled to control the rotation speed.

The output of the second counting means 17 and the output of the third counting means 18 are generally small in the case of a "flat floor surface" and large in the case of a "carpet surface with a lot of waste hair". Determine the exponent.

The fuzzy inference unit 19 calculates the index of the floor surface and the first counting means 16.
The input of the electric blower 2 is determined by the output of
The input of the electric blower 2 is determined by the input inference rules shown in Table 2 based on the dust amount membership function and the floor membership function as shown in FIGS. 3 (a) and 3 (b).

The operation of the above configuration will be described with reference to FIGS. 4 (a) to (d) to FIG.

As shown in FIGS. 4 (a) and 4 (b), dust is relatively large on the "carpet surface with a lot of waste" and is continuously sucked in. On the "flat floor surface", FIG. As shown in (d) and (d), dust is locally present, and almost no dust is removed by a single suction, and there is no continuity in dust detection. The first counting means 16 counts the number of passes of the dust 12 per unit time of the output of the pulse converter 14 as shown in FIG. 5 (a), and obtains a count value as shown in FIG. 5 (b). The second counting means 17 and the third counting means 18 count the number of the first counting means 16 when the value of the first counting means 16 is a predetermined value, and FIG.
A count value as shown in (d) is obtained. FIG. 5 (b)
In (d), the specific numerical value of the count value is omitted.

The above operation will be described with reference to FIG. 6. A series of cycles in the flowchart of FIG. 6 is performed at a half cycle of the power supply frequency. Therefore, when the power supply frequency is 60 Hz, it is 0.1 second when the timer section 20 of step 1 counts 12 times. The passage of the dust 12 is performed by the first counting means 16 by the interrupt function.
Is counted. If the unit time has elapsed in step 2, the count value of the first counting means 16 is checked in step 3,
If the count value is equal to or more than the second predetermined value (for example, 3), the count value of the third counting means 18 is incremented by one. If the count value is not equal to or more than the second predetermined value (for example, 3) in Step 3, the process proceeds to Step 3 '. The count value of the first counting means 16 is checked, and if the count value is equal to or more than a first predetermined value (for example, 2), the count value of the second counting means 17 is incremented by one. In step 4, the optimum input of the electric blower 2 is determined by fuzzy inference from the count value of the first counting means 16 and the floor index previously indexed as described later, and the count value of the first counting means 16 is cleared. . If less than the predetermined value, the second counting means 17 and the third counting means
After the above-mentioned fuzzy inference is performed without doing anything, the count value of the first counting means 16 is cleared. Step 5
If the predetermined time has elapsed in step 6, the second counting means is set in step 6
17 and the third counting means 18 determine the floor index as shown in Table 1. The second counting means 17 and the third counting means 18
Is cleared and a series of processing is completed. As described above, the floor surface under operation is automatically identified based on the output of the sensor 8, and the input of the electric blower 2 is controlled according to the floor surface. In (2), it is possible to control so as to increase the number of inputs, so that the dust is sucked more quickly. In this manner, by identifying the floor surface and detecting the amount of dust, the hatched portion (intermediate value) in FIG. 7 can be controlled, and fine and smooth input control can be performed. The electric blower can be controlled according to the floor surface by detecting dust without such an artificial operation, and the usability can be improved.

Effects of the Invention As is apparent from the above embodiments, according to the present invention, the fuzzy inference device for determining the input of the electric blower includes a plurality of counting means for indexing the output of the first counting means and the type of floor surface. Since the input of the electric blower is determined by the output, the cleaning floor surface can be identified without any manual operation, and the input of the electric blower can be automatically controlled according to the cleaning floor surface and dust,
On the "carpet surface" where there is a lot of dust, the input is controlled so as to increase, the dust can be sucked more quickly, and the usability can be improved.

[Brief description of the drawings]

FIG. 1 is a block circuit diagram of a vacuum cleaner according to an embodiment of the present invention, FIG. 2 is a sectional view of a sensor of the vacuum cleaner, and FIGS. 3 (a) and 3 (b) are fuzzy diagrams of the vacuum cleaner. 4 (a) to 4 (d) are diagrams showing membership functions of the inference device, and FIGS. 4 (a) to 4 (d) are characteristic diagrams of the vacuum cleaner at the time of detecting dust, and FIGS.
Is a time chart of the main part of the vacuum cleaner, FIG. 6 is a flowchart of the main part of the vacuum cleaner, FIG. 7 is a characteristic diagram of an operation state of the vacuum cleaner, and FIG. 8 is a perspective view of a conventional vacuum cleaner. FIG. 2 ... Electric blower, 8 ... Sensor, 9 ... Dust passage, 12
... dust, 14 ... pulse conversion unit (pulse conversion means), 16
... first counting means, 17 ... second counting means, 18 ... third counting means, 19 ... fuzzy inference device.

Continuation of the front page (56) References JP-A-3-77522 (JP, A) JP-A-3-77523 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) A47L 9 / 28

Claims (1)

(57) [Claims] A sensor for detecting dust passing through a dust passage;
A pulse conversion unit for converting the output of the sensor into a pulse signal, a first counting unit for counting the number of pulses from the pulse conversion unit within a unit time, and a count result of the first counting unit being greater than or equal to a predetermined value. A plurality of counting means for performing counting, and a fuzzy inference device for determining an input of the electric blower, wherein the fuzzy inference device includes an output of the first counting means and a plurality of counting means having different predetermined values. An electric vacuum cleaner wherein the input of the electric blower is determined based on information obtained by indexing the type of floor surface from the count value.