JPS6137924B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vacuum cleaner that filters coarse dust such as cotton waste using a labyrinth effect, and its purpose is to make the dust collecting section smaller and more compact.

In conventional vacuum cleaners, a filter device is composed of a pre-filter made of a mesh material and a main filter made of filter paper. However, in the above-mentioned filter device, especially the pre-filter made of a mesh material, the mesh is easily clogged with fibrous dust, and as a countermeasure to this, it is necessary to set the filtering surface large. Therefore, due to the relationship with the prefilter, the shape of the dust collection section inevitably becomes large, and since clogging of the prefilter cannot be completely prevented, dust absorption performance is also poor.

The present invention eliminates these conventional drawbacks, and embodiments thereof will be described below with reference to the accompanying drawings.

In the figure, reference numeral 1 denotes a vacuum cleaner main body having front and rear wheels 2 and 3 at the bottom, and a fan motor 4 and a filter device 5 located on the suction side thereof. Reference numeral 6 designates a circular dust collecting case detachably attached below the filter device 5, 7 designates a vertical intake pipe passing through the filter device 5, the upper end of which opens outside the vacuum cleaner main body 1, and The lower end is open in the circumferential direction within the dust collection case 6, so that the dust-containing air that flows therein makes a swirling motion.

The filtration device 5 is configured so that air passes from the outer periphery to the inner periphery, and includes a main filter 8 fixed to the cleaner body 1, and a vertical labyrinth passage 9 formed on the upstream side of the main filter 8.
It is composed of. This labyrinth passage 9
are the cylindrical part 11 of the funnel-shaped fine dust case 10 installed below the main filter 8, and the cylindrical part 11.
and the cylindrical body 12 located inside. That is, the inside of the cylindrical part 11 and the cylindrical body 12
A meandering labyrinth passage 9 is formed by alternately protruding fins 13 and 14 outward from each other, with their tips overlapping each other. The fins 13 and 14 have an inclined shape with a downward end, and at least one of them is made of an elastic material.
4 is fixed to a sliding tube 15. The sliding pipe 15 is fitted onto the outer periphery of the intake pipe 7 so as to be slidable only in the vertical direction, and has a cam 16 at its upper end. 17 is a spring that urges the sliding pipe 15 upward; 18 is a drive pipe that is located above the sliding pipe 15 and rotatably fitted to the outer circumference of the intake pipe 7, and is opposed to the cam 16 mentioned above; It has a cam 19 at its lower end. 20 is a gear fixed to the drive tube 18;
A small gear 1 is rotated via a handle 22 and meshes with the large gear 20.

23 is a non-breathable dust bag such as a plastic bag whose opening is attached to the outer periphery of the cylindrical part 11 via a rubber band 24 or the like; This is a negative pressure passage for operating the bag 23 to expand the bag 23. 26 is an exhaust hole.

In the above configuration, the dust-containing air that flows in through the intake pipe 7 makes a swirling motion within the dust collection case 6, and the mass of dust is first separated from the dust-containing air by centrifugal force. Next, the above air passes through the labyrinth passage 9
pass through. Here, the dust is filtered by the so-called labyrinth effect, in which the dust loses kinetic energy due to collisions with the fins 13 and 14 and vortices when passing through the fins 13 and 14.

Furthermore, fine dust is filtered by the main filter 8, and only clean air is passed through the fan motor 4 to the exhaust hole 2.
6.

The dust filtered through the labyrinth passage 9 is transferred to the fin 1.
It descends sequentially along the slopes 3 and 14, and eventually accumulates in the collected dust 23. Also, some dust, such as cotton waste, may get caught on the fins 13 and 14, but this does not affect the ventilation in any way.

Next, the dust attached to the fins 13 is removed by rotating the small gear 21 via the handle 22.

That is, when the large gear 20 rotates via the small gear 21, the drive tube 18 also rotates, and the sliding tube 1 is rotated by the actions of the cams 16, 19 and the spring 17.
5 and one fin 14 move up and down. The tips of the fins 14 and the other fin 13 overlap each other and repel each other due to their elasticity, thereby removing dust.

Further, dust can be disposed of in an extremely hygienic manner by removing the dust bag 23 from the cylindrical portion 11.

In this way, the present invention has a labyrinth passage formed upstream of the main filter instead of a pre-filter made of a net material, and the labyrinth effect of the passage filters dust, which eliminates the problem of conventional clogging. There is no pressure loss caused by the vacuum cleaner, and it can collect dust efficiently, and the area required for the dots is extremely small compared to a mesh pre-filter, so even if the vacuum cleaner is made smaller, it can still collect dust. It is possible to ensure that

Further, as the fins move, the opposing fins repel each other, thereby removing dust from the labyrinth passage, ensuring performance recovery and ensuring good filtration at all times.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a vacuum cleaner showing an embodiment of the present invention, FIG. 2 is a cross-sectional view of a labyrinth passage, and FIG.
The figure is a perspective view showing the fin moving mechanism. 4...Fan motor, 7...Intake port (intake pipe), 8...Main filter, 9...Labyrinth passage, 13, 14...Fin.

Claims (1)

[Claims] 1 A meandering labyrinth passage is created by disposing a main filter in the middle of the suction passage from the intake port to the fan motor, and protruding elastic fins alternately from the opposite passage wall with overlapping tips. The fins are formed in a vertical direction in a part of the suction passage upstream of the main filter, and the fins are inclined so that the tips thereof are lowered, and a mechanism is provided to move the fins of one group relative to the fins of the other group. An electric vacuum cleaner characterized by: