JP2563678B2 - Electric vacuum cleaner - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric vacuum cleaner capable of confirming the amount of dust collected by cleaning.

[0002]

2. Description of the Related Art Conventionally, an electric vacuum cleaner of this type has a structure as shown in FIG. Hereinafter, description will be given with reference to the drawings.

As shown in the figure, the suction port 2 of the main body 21
A hose 23, an extension pipe 24, and a suction tool 25 are connected to 2. A hand switch 26 is provided at the tip of the hose 23, and the body switch 21 is operated by operating the hand switch 26.
The rotation number of the electric blower 27 provided inside is controlled.

[0004]

However, such a conventional electric vacuum cleaner has a problem that it is impossible to confirm whether dust is removed or remains even after cleaning.

The present invention has been made to solve the above problems, and an object thereof is to make it possible to confirm the amount of dust sucked during cleaning, to inform the user of the standard of cleaning, and to provide an efficient cleaner.

[0006]

To achieve the above object, an electric vacuum cleaner according to the present invention comprises a dust sensor provided in an air passage through which dust passes, and pulse conversion for converting the output of the dust sensor into a pulse signal. Section, counting means for counting the number of pulses from this pulse conversion section within a unit time, control means for accumulating the counting results by this counting means to calculate a time average, and dust amount input from the control means. And a confirmation switch for outputting to the control means to confirm the amount of dust, and a switching switch is provided instead of the confirmation switch.

[0007]

In the above structure, the dust sensor outputs to the pulse conversion unit according to the number of dusts, the number of pulses from this pulse conversion unit is counted within a unit time and accumulated to calculate the time average, When the confirmation switch is operated, the signal is input to the control means, and the amount of dust during cleaning can be displayed on the display means, and when the off switch is operated, the signal is input to the control means and the display means ends. The amount of dust up to can be displayed.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 4 show a first embodiment of the present invention.

As shown in the figure, a light emitting diode 2 is provided in the air flow path 1, a light receiving portion 3 is provided facing the light emitting diode 2, and a change in the amount of light is detected by dust 4 passing through the air flow path 1. It The light emitting diode 2 and the light receiving portion 3 form a dust sensor 5. As shown in FIG. 1, the signal of the light receiving section 3 is amplified by the amplifying section 6, waveform-shaped by the pulse converting section 7, and input to the control means 8. The control means 8 has a counting means 8a, an accumulating section 8b, and a timer section 8c, and is connected from the control means 8 via a phase control circuit 9 to an electric blower 2 and a display lamp 10 for notifying the amount of dust. . Reference numeral 11 is a confirmation switch for confirming the amount of dust during cleaning.

The operation of the above structure will be described with reference to FIGS. 3 and 4. The counting means 8a counts the number of passing dusts 4 per unit time, and the accumulating section 8b counts the counting means 8a.
Total of. A series of cycles in the flowchart of FIG. 4 is performed at a half cycle of the power supply frequency. Therefore, when the power supply frequency is 60 Hz, it is 0.1 seconds when the timer unit 8c of step 1 counts 12 times. The passage of the dust 4 is counted by the counting means 8a by the interrupt function. If the unit time has elapsed in step 2, the counting means 8 is operated in step 3.
The count value of "a" is added up and added up by the adding up section 8b, and the counter of the counting means 8a is cleared. In step 4, the time during cleaning is counted. If the confirmation switch 11 is pressed in step 5, the contents of the accumulator 8b are divided by the time counted in step 4. Further, the number of display lamps 10 (which may be infrared light emitting diodes) displayed based on the result of the division is determined. Then, in step 6, the counter of the accumulator 8b is cleared and the display lamp 10 is displayed for a certain period of time, and the series of processes is completed.

FIG. 5 shows a second embodiment in which a cut-off switch 12 is provided in place of the confirmation switch 11 and the same processing as that of the above-mentioned embodiment is carried out. This is because the cut-off switch 12 operates at one break time to operate the vacuum cleaner, and mainly corresponds to cleaning one room.
The display number of the display lamp 10 relatively indicates the amount of dust in the room. This has an effect that the degree of dust dispersal in each room can be known.

Incidentally, as shown in FIG. 6, the control means 8 continuously counts the cleaning time with the accumulating portion 8b. That is, when the off switch 12 is pressed from the second time onward, the accumulation unit 8 from the beginning
The counter of b, which is a relative indication of the amount of dust drawn in using the vacuum cleaner. This has an effect that it is possible to know the condition of all the dust that is being cleaned.

[0013]

As described above, according to the electric vacuum cleaner of the present invention, the dust sensor provided in the air passage through which the dust passes,
A pulse conversion unit that converts the output of the dust sensor into a pulse signal, a counting unit that counts the number of pulses from this pulse conversion unit within a unit time, and a counting result by this counting unit is accumulated to calculate a time average. The control means is provided with a display means for displaying the dust amount input from the control means and a confirmation switch for outputting the dust amount to the control means to confirm the dust amount. Can be displayed, and a guideline for cleaning can be seen, and cleaning work can be performed efficiently.

[Brief description of drawings]

FIG. 1 is a block circuit diagram of a vacuum cleaner according to a first embodiment of the present invention.

FIG. 2 is a sectional view of a main part.

FIG. 3 is an operation explanatory diagram of control means.

[Fig. 4] Operation flowchart

FIG. 5 is a block circuit diagram of the electric vacuum cleaner according to the second embodiment of the present invention.

FIG. 6 is an operation flowchart of an electric vacuum cleaner according to another embodiment of the present invention.

FIG. 7 is an external perspective view of a conventional vacuum cleaner.

[Explanation of symbols]

 5 Dust Sensor 7 Pulse Converter 8 Control Means 8a Counting Means 10 Display Lamp (Display Means) 11 Confirmation Switch

Continuation of front page (56) Reference JP-A-3-77522 (JP, A) JP-A-2-297329 (JP, A) JP-A-2-168923 (JP, A) JP-A 64-25828 (JP , A) JP-A-63-194624 (JP, A)

Claims (2)

(57) [Claims] 1. A dust sensor provided in an air passage through which dust passes, a pulse converter for converting an output of the dust sensor into a pulse signal, and a counting for counting the number of pulses from the pulse converter within a unit time. Means, control means for calculating the time average by accumulating the counting results by the counting means, display means for displaying the dust amount input from the control means,
An electric vacuum cleaner comprising: a confirmation switch for outputting to the control means to confirm the amount of dust, and operating the confirmation switch to display the amount of dust during cleaning. 2. An off switch is provided in place of the confirmation switch,
The vacuum cleaner according to claim 1, wherein the amount of dust until the "cut" operation is displayed by operating the cut switch.