JPH03280915A - Dust passing quantity detecting device - Google Patents

Abstract

PURPOSE:To display the sucked dust quantity without being affected by the sticking of dust particles by electrifying the sucked dust particles, detecting the quantity of charges carried by the dust particles, and outputting the dust passing quantity signal in response to the charge quantity. CONSTITUTION:In a dust passing quantity detecting device 1 installed at part of the dust suction path of a cleaner, sucked dust particles are brought into contact with an electrifying electrode 4 applied with the potential generated by an electrifying potential generation section 3 and receive a fixed quantity of charges in an electrification section 2. A detecting electrode 6 receives charges from the dust particles brought into contact in an charge quantity detection section 5. The quantity of charges received by the detecting electrode 6 varies according to the passing quantity of dust particles. A capacitor C and a resistor R convert the quantity of charges received by the electrode 6 into voltage. An LCD 7 changes the reflected light quantity according to the voltage. The passing quantity of dust particles is shown by the brightness of the LCD 7.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a passing dirt amount detection device, and more particularly to a passing dirt amount detection device for detecting the amount of dirt sucked in by a vacuum cleaner.

[Prior Art] FIG. 6 is a configuration diagram of an example of a conventional dust passing amount detection device.

In this dust passing amount detection device 51, the near-infrared LED 52 is driven by the LED driving section 53 and emits near-infrared light.

The photodiode 54 receives near-infrared light emitted from the near-infrared LED 52 and outputs an electric signal.

However, since the near-infrared LED 52 and the photodiode 54 are provided across the dust suction path, the amount of near-infrared radiation received by the photodiode 54 is equal to the amount of dust particles inhaled (hereinafter referred to as the amount of passing dust particles). ) will change accordingly.

Therefore, the transmitted light amount detection section 55 measures the electrical signal output from the photodiode 54 to detect the amount of passing dust particles.

The display unit 56 displays the amount of passing dust particles detected by the transmitted light amount detection unit 55.

[Problems to be Solved by the Invention] In the above-mentioned conventional dust passing amount detection device f151, near-infrared LE
There is a problem in that detection sensitivity decreases due to dust particles adhering to the light emitting window of the D52 and the light receiving window of the photodiode 54.

Further, the near-infrared LED 52 and the photodiode 54 must be installed at opposing positions across the dust suction path, which poses a problem of complicating the structure.

SUMMARY OF THE INVENTION Therefore, it is an object of the present invention to provide a dust passing amount detection device that is not affected by the adhesion of dust particles and has a simple structure.

[Means for Solving the Problems] A passing dirt amount detection device of the present invention includes a charging means for charging inhaled dirt particles in the passing dirt amount detection device installed in a part of a dirt suction path of a vacuum cleaner. , a configuration feature comprising a charge amount detection means for detecting the amount of charge carried by the dust particles, and a dust passing amount signal output means for outputting a dust passing amount signal according to the detected amount of charge. That is.

[Function] In the dust passing amount detection device of the present invention, the charging means charges the dust particles that are sucked. On the other hand, the charge amount detection means detects the amount of charge carried by the dust particles.

When the amount of dirt particles passing through changes, the amount of charge carried by the dirt particles changes accordingly.

Therefore, the dust passing amount signal output means outputs a dust passing amount signal from the charge amount detected by the charge amount detection means.

[Example] Hereinafter, the present invention will be described in more detail based on the example shown in the drawings. Note that this invention is not limited to this.

FIG. 1 shows a dust passing amount detection device 1 according to an embodiment of the present invention.
FIG.

In this dust passing amount detection device 1, in the charging unit 2, the inhaled dust particles come into contact with the charging electrode 4 to which a potential generated by the charging potential generating unit 3 is applied, and receive a certain amount of charge. take.

In the charge amount detection section 5, the detection electrode 6 receives and removes the charge from the dust particles with which it comes into contact.

The amount of charge received by the detection electrode 6 changes depending on the amount of passing dust particles.

The capacitor C and the resistor R convert the amount of charge received by the detection electrode 6 into voltage.

The LCD 7 changes the amount of reflected light depending on the voltage.

Therefore, depending on the brightness of the LCD 7, the amount of passing dust (particles) can be determined.

FIG. 2(a) shows the change in the amount of charge carried by dust particles.

FIG. 2(b) shows the voltage generated across the capacitor C9 resistor R.

Incidentally, since the surfaces of the charging electrode 4 and the detection electrode 6 are constantly cleaned by the collision of large-sized dust particles with the charging electrode 4 and the detection electrode 6, no maintenance is required.

FIG. 3 is an explanatory diagram showing the main parts of the dust passing amount detection device 11 according to another embodiment of the present invention.

In this dust passing amount detection device 11, an electret 14 is used in the charging unit 12 to charge the dust particles that are inhaled. 16 is a detection electrode.

FIG. 4 is an explanatory diagram showing the main parts of a passing dust amount detecting device 21 according to still another embodiment of the present invention.

In this dust passing amount detection device 21, a charger electrode 24 is used in the charging section 2, and the dust particles that are inhaled are charged by corona discharge. 26 is a detection electrode.

FIG. 5 is a circuit diagram of an impedance converter 30 which is an example of a means for outputting a dust passing amount signal according to the present invention.

This impedance converter 30 can be replaced with the LCD 7 in FIG. 1 or connected in parallel.

The dirt passing amount signal output by the impedance converter 30 increases the rotation speed of the vacuum cleaner motor when a large amount of dirt passes, and decreases the rotation speed of the vacuum cleaner motor when a small amount of dirt passes. Used for control.

[Effects of the Invention] According to the passing dust amount detection device of the present invention, an electrical output can be obtained in accordance with the amount of dust sucked in.

Therefore, it is possible to display the amount of inhaled dust.

Moreover, optimal control of the vacuum cleaner becomes possible.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of a dust passing amount detection device according to an embodiment of the present invention, FIG. 2(a) is a characteristic diagram showing temporal changes in the amount of charge carried by dust, and FIG. C1 resistance R
FIG. 3 is an explanatory diagram showing the main parts of a passing dust amount detection device according to another embodiment of the present invention, and FIG. 4 is a characteristic diagram showing a temporal change in the voltage generated at both ends of the invention. FIG. 5 is a circuit diagram of an impedance converter according to the present invention, and FIG. 6 is an explanatory diagram of an example of a conventional dust passage amount detection device. (Explanation of symbols) 1.11.21... Dust passing amount detection device 2... Charging section 3... Charging potential generation section 4... Charging electrode 5... Charge amount detection section 6.・Detection electrode
7...LCD14...Electret.

Claims (1)

[Claims] 1. A dust passing amount detection device installed in a part of a dust suction path of a vacuum cleaner includes a charging means for charging inhaled dust particles and detecting the amount of electric charge carried by the dust particles. What is claimed is: 1. A dust passing amount detection device comprising a charge amount detecting means and a dust passing amount signal outputting means for outputting a dust passing amount signal according to the detected charge amount.