JP2640187B2 - 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 a vacuum cleaner, and more particularly to a wet vacuum cleaner.

[0002]

2. Description of the Related Art In general, a dry vacuum cleaner that collects dust with a filter such as paper or non-woven fabric is used to catch dust through water contained in a water pan (water tray) containing suctioned dust. A wet vacuum cleaner as shown in FIG. 3 is known. Unlike a dry vacuum cleaner, this wet vacuum cleaner does not cause extreme clogging of the filter, and can theoretically collect fine dust. In FIG. 3, reference numeral 1 denotes a main body case, in which a suction motor 4 is provided, and a centrifugal fan 5 and a water separator 7 are fixed to a shaft of the motor 4. Numeral 8 indicates an air route.

When the motor 4 is operated by the operation power supply unit 11, the intake air containing dust sucked from an intake hose (not shown) passes through the intake port 6 and is discharged into the water pan 2 through the introduction unit 10. . Dust water 3 is previously contained in the water pan 2, and dust contained in the intake air is collected. The intake air leaving dust 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.

[0004]

In a conventional dry-type vacuum cleaner, when a large amount of dust is collected, the ventilation resistance of a filter through which intake air passes increases, so that the intake pressure and the load current of the suction motor are reduced. By detecting, it was possible to know the amount of collected dust relatively easily, that is, the time to replace the filter pack or discard the dust. On the other hand, in a wet vacuum cleaner, the water pan 2 shown in FIG. 3 is formed of a transparent resin or the like, and a window (not shown) is provided in the lower case 12 on which wheels are disposed, so that water for dust collection is provided. They used an abstract means of monitoring dirt to know when to change water. By the way, this water dirt does not always match the amount of dust collected,
For example, even if a large amount of near-white dust or cotton dust is collected, the apparent stain is not noticeable. However, in this case, the movement of the water for collection is hindered, and the collection efficiency is greatly reduced. As described above, in a wet vacuum cleaner, the amount of collected dust cannot be detected by a simple method such as a dry vacuum cleaner. SUMMARY OF THE INVENTION It is an object of the present invention to provide a vacuum cleaner capable of detecting the amount of collected dust with a simple configuration in a wet vacuum cleaner.

[0005]

In order to achieve the above object, a vacuum cleaner according to the present invention is a wet vacuum cleaner that captures dust through suction air containing suctioned dust in water previously contained in a water pan. In the machine, a rotor whose number of rotations is reduced in accordance with the amount of dust collected by the water is provided in the water pan, and means for detecting the number of rotations of the rotor is provided. Display means for displaying or warning by means of

[0006]

In the wet vacuum cleaner constructed as described above, the rotor is rotated by the suction or the like by operating the suction motor. This rotor is at least partially submerged in the dust collecting water. The rotor increases its rotational resistance as the amount of dust in the water for dust collection increases,
The rotation speed decreases. The amount of dust can be grasped by detecting the rotation speed.

[0007]

FIG. 1 shows an embodiment of the present invention.
This will be described with reference to FIG. FIG. 1 is a schematic sectional view of a main portion mainly showing a portion related to the present invention of a wet-type vacuum cleaner, and the same reference numerals as those in FIG. 3 indicate the same portions. Parts not shown are configured similarly to FIG. FIG. 2 is a plan view of a main part of FIG. In FIG. 1, reference numeral 21 denotes a conventionally used water level pin, which is integrally formed with the water pan 2 and serves as a measure of the amount of water when the dust collecting water 3 is put into the water pan 2. Reference numeral 22 denotes a rotor, which is provided rotatably about the water level pin 21. As shown in FIG. 2, the rotor 22 is provided with wings 23 at its upper portion for receiving intake air and has four arms 24 having a circular cross section. A resin magnet 25 for rotation detection is fixed to a part of the wing 23.

As shown in FIG. 2, an introduction portion 10 for guiding the intake water to the water 3 for dust collection from an intake port 6 provided in the water pan 2 is opened clockwise. It reaches the slit of the water separator 7 while rotating as shown by the arrow. The blade 23 of the rotor 22 is rotated by the flow of the intake air, and accordingly, the rotor 22 rotates in the direction indicated by the solid arrow in FIG.

When this vacuum cleaner is used, water 3 for dust collection is put into the water pan 2 using the water level pin 21 as a guide, and the center of the rotor 22 is placed on the water level pin 21. The main body case 1 including the motor 4 described in FIG. Thereby, the rotor 22 is also set at the center.

In the vacuum cleaner configured as described above,
The water 3 for dust collection by the rotor 22 is turned into a circular water pan 2.
The dust is forcibly rotated inside and the dust tends to accumulate on the outer periphery. Due to the rotation of the arm 24 of the rotor 22, the arm 24 traverses the introduction portion 10 following the intake port 6, and the intake water containing the water 3 for collection and the dust is diffused and mixed. Due to the diffusion and mixing, the air bubbles of the intake air are subdivided, and the contact efficiency of the light floating dust in the air bubbles with the water 3 can be increased, so that the dust collecting effect is improved.

Reference numeral 27 denotes a sensor using a magnetoresistive element;
Is a detection circuit to which the output of the sensor 27 is input,
The rotation speed of the rotor 22 is detected by detecting the magnetic flux from the resin magnet 25 of the rotor 22. The detected number of rotations is displayed by appropriate known display means (not shown). When the amount of dust caught in the water for dust collection 3 increases, the rotation resistance to the arm 24 increases, and the rotation of the rotor 22 decreases, the display means displays this, and the amount of dust decreases. You can see that it has increased. In FIGS. 1 and 2, reference numeral 28 denotes a rib protruding inside the water pan 2, and the arm 2 of the rotor 22.
This is to prevent the rotation of 4 and the rotation of the dust collecting water 3 from being the same, and to enhance the efficiency of fragmentation of bubbles by the rotation of the arm 24. Instead of projecting the ribs 28, the water pan may be formed in a polygonal shape such as a square or hexagon instead of a circle.

In the above embodiment, the sensor 27 composed of a magnetoresistive element is used as means for detecting the rotation of the rotor 22, but a sensor composed of a detection coil or a Hall element may be used. The means is not limited to magnetic means, but may be optically known means. In addition, the display means may be a means for displaying the number of rotations by a number or a bar graph, and when the number of rotations falls below a set value, an alarm is displayed by a sound or a change in the color of the display unit. You may do it.

In the above-described embodiment, the rotor 22 is rotated by the intake air.
A magnet is provided for each of the water separator 7 and the rotor 22 which are rotated by the motor, whereby the water separator 7 and the rotor 22 are magnetically coupled to rotate the rotor 22 by the rotation of the motor 4. Is also good. In the above embodiment, the number of the arm portions 24 of the rotor 22 is four, but the number is not limited to four. The number of the arms 24 is desirably two to four. Further, since the rotor 22 can be easily attached and detached, cleaning is easy.

[0014]

Since the present invention is configured as described above, the amount of dust collected by a wet-type vacuum cleaner, which can only be grasped in an abstract manner in the past, is quantitatively displayed or warned with a simple configuration. be able to.

[Brief description of the drawings]

FIG. 1, showing an embodiment of the present invention, is a schematic longitudinal sectional front view of a relevant portion of a wet vacuum cleaner relating to the present invention.

FIG. 2 is a plan view showing a main part of FIG.

FIG. 3 is a vertical sectional front view of a wet vacuum cleaner showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body case 2 Water pan 3 Water 4 Motor 6 Intake port 9 Exhaust port 10 Introducing part 12 Lower case 22 Rotor 23 Wing 24 Arm part 25 Resin magnet 27 Sensor

Claims (1)

(57) [Claims] 1. A wet vacuum cleaner for collecting dust through water containing suctioned dust in water previously placed in a water pan, wherein a rotor whose rotation speed is reduced in accordance with the amount of dust collected by the water is used. A vacuum cleaner provided in the water pan, comprising means for detecting the number of revolutions of the rotor, and display means for displaying or warning in relation to the number of revolutions detected by the means.