JPH05130955A - Vacuum cleaner - Google Patents

Abstract

PURPOSE:To efficiently collect light floating dusts and to reduce the amount of mist to be ejected. CONSTITUTION:The wet-type vacuum cleaner collects dusts by passing the suction including the absorbed dust in water 3 for collecting dust stored in a water pan 2 in advance. A corona discharge part charging the remaining dusts is provided on the suction path through the water 3 and a cylindrical electric filter 13 on the downstream of the corona discharge part. The corona discharge part consists of a needle-shaped positive electrode 11 and a ring-shaped negative electrode 12 arranged on the circumference. The high DC voltage is impressed between the electrods 11 and 12. The generation of the corona discharge positively charges the floating dust in air bubble which can not be caught when passing through the water 3 in the water pan 2 and the fine mist passing through a water separator 7, and they are collected by a cylindrical electric filter 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum cleaner, and more particularly to a wet vacuum cleaner.

[0002]

2. Description of the Related Art In general, a dry electric vacuum cleaner which collects dust by a filter such as paper or non-woven fabric collects water in a water pan (water tray) through suction air containing the sucked dust. A wet electric vacuum cleaner as shown in FIG. 2 is known. Unlike the dry type vacuum cleaner, this wet type vacuum cleaner does not cause the local filter clogging, and theoretically can collect fine dust. In FIG. 2, reference numeral 1 denotes a main body case, a suction motor 4 is arranged in the case 1, and a centrifugal fan 5 and a water separator 7 are fixedly mounted on a shaft of the motor 4. Reference numeral 8 indicates an air route.

When the motor 4 is operated by an operating power source (not shown), the intake air containing dust sucked from the intake hose (not shown) passes through the intake port 6, passes through the introduction part 10, and then inside the water pan 2. Is discharged. The water pan 2 contains water 3 for dust collection in advance, and the dust contained in the intake air is captured. The intake air in which dust remains in the water 3 passes through the slit of the rotating water separator 7 and is exhausted from the exhaust port 9 by the centrifugal fan 5. In the vacuum cleaner shown in FIG. 2, the intake air containing dust is discharged into the water in the water pan 2. However, as a conventional wet electric vacuum cleaner, the intake air containing dust is hit against the water surface of the water pan. Some will be released to.

[0004]

In the conventional wet electric vacuum cleaner described above, the relatively heavy dust contained in the intake air comes into contact with water and is easily trapped in the water, but the light floating dust is explained with reference to FIG. Even those configured to be discharged into water are suspended in large bubbles of inhaled air, and are difficult to contact with water, so that they are easily collected and discharged. In addition, the conventional wet electric vacuum cleaner described above has a drawback in that dirty water for dust collection is discharged as a mist, although the amount thereof is very small due to its structure. The present invention eliminates the above-mentioned drawbacks of the conventional wet electric vacuum cleaner, is capable of sufficiently collecting light suspended dust, and is capable of sufficiently reducing the amount of mist discharged. Is.

[0005]

In order to achieve the above object, an electric vacuum cleaner of the present invention is a wet type electric vacuum cleaner in which water preliminarily put in a water pan is trapped through intake air containing sucked dust. In the machine, a corona discharge part for charging residual dust and the like is provided in an intake passage passing through the water, and a cylindrical electret filter is provided downstream of the corona discharge part.

[0006]

In the wet type vacuum cleaner configured as described above, the light airborne dust which is not collected even though the intake air containing the sucked dust passes through the water in the water pan,
Also, the minute mist that cannot be completely separated by the water separator is charged in the corona discharge part, and is collected by the cylindrical electret filter installed downstream thereof.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. FIG. 1 is a sectional view mainly showing the part of the wet electric vacuum cleaner related to the present invention, and the same reference numerals as those in FIG. 2 denote the same parts. In FIG. 1, 11 is a needle-shaped positive electrode arranged circumferentially (4 to 8), 12 is a ring-shaped negative electrode, and 2 to 6 KV between these electrodes 11 and 12.
Corona discharge is generated by applying a high DC voltage. Due to the occurrence of this corona discharge, the dust contained in the intake air passing through the intake passage, that is, the floating dust in the bubbles that could not be caught when passing the water 3 in the water pan 2 and the water separator 7 were passed through. The minute mist is positively charged.

Inside the exhaust port 9, a cylindrical electret filter 13 having a fitting structure, which is negatively polarized and charged, is detachably attached. The positively charged minute suspended dust or mist passing through the centrifugal fan 5 is collected by the cylindrical electret filter 13 without pressure loss. By the way, the collecting effect is improved by forming the electret filter in a cross beam shape or a honeycomb shape.

[0009]

EFFECTS OF THE INVENTION Since the present invention is constituted as described above, it is possible to efficiently collect fine floating dust with a simple structure and prevent discharge of the dirty water mist peculiar to the wet cleaner. You can

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention and is a vertical cross-sectional front view of a main part of the wet electric vacuum cleaner related to the present invention.

FIG. 2 is a vertical sectional front view of a conventional wet electric vacuum cleaner.

[Explanation of symbols]

 1 Main Body Case 2 Water Pan 3 Water 4 Motor 6 Intake Port 9 Exhaust Port 10 Introductory Section 11 Needle-shaped Positive Electrode 12 Ring-shaped Negative Electrode 13 Cylindrical Electret Filter

Claims (1)

[Claims] 1. In a wet type vacuum cleaner that collects dust preliminarily put in a water pan through suction air containing suctioned dust, a corona discharge unit for charging residual dust and the like in a passage of the suction air passing through the water. And a cylindrical electret filter provided downstream of the corona discharge part.