JPH0546810B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vacuum cleaner, and particularly to a vacuum cleaner designed to purify exhaust air.

[Conventional technology] Conventional vacuum cleaners have a primary dust collection section that collects and filters most of the dust that is sucked into a filter made of non-woven fabric or a disposable paper bag, and a filter that collects fine dust in microns that leaks from the filter and paper bag. Exhaust gas was purified using a secondary dust collection unit such as a charged filter that collects and filters the dust.

[Problem that the invention seeks to solve]

Conventional vacuum cleaners are configured as described above, so in order to improve the collection performance of exhaust dust, the pressure drop must be minimized so as not to reduce the suction performance, and the wind speed must be extremely reduced to improve the collection performance. Therefore, the area of the charged filter in the secondary dust collection section must be increased, which is a contradictory technical issue for a vacuum cleaner that aims to be lightweight and compact.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a vacuum cleaner with a simple structure and improved exhaust dust collection performance.

[Means for solving problems]

The vacuum cleaner according to the present invention includes a first charged filter detachably provided in front of a blower motor, a jaggedly folded Hepa filter (HEPA filter) provided at the rear of the blower motor, and a HEPA filter provided at the rear of the HEPA filter. A second elastic charging filter that is pressed by the ridge line portion of the filter is provided.

Note that Hepafilter is a high-performance filter made of high-density and ultra-fine glass fiber.

[Effect]

In the vacuum cleaner of the present invention, by providing a jagged Hepa filter behind the blower motor, the filter area can be secured and the performance of collecting exhaust dust can be improved. By providing the filter at the front or rear, the strength of the filter and the time taken for clogging by fine dust can be increased, and the exhaust gas purification performance can be improved without impairing the lightweight and compact design of the vacuum cleaner.

〔Example〕

Hereinafter, a diagram of an embodiment of the present invention will be described.

In Fig. 1, 1 is the main body case, which is open at the front, has a partition wall 2 with a grid in the center, an exhaust vent 3 at the rear, and a carrying handle 4 at the top, and can be assembled into left and right or top and bottom parts. There is. Reference numeral 5 denotes a garbage disposal lid which is detachably provided at the opening of the main body case 1 with a latch 6 and has a suction port 7 in the center;
is a mount made of a material such as hard cardboard, which attaches and detaches a disposable paper bag 9, which collects and filters most of the large dust that is sucked in, so as to tightly adhere to the suction port 7, and holds the paper bag 9 together by adhesive. There is.
10 is a removable first charging filter disposed in front of the partition wall 2 with a grid and behind the paper bag 9;
14 is a blower motor installed inside the main body case 1 via anti-vibration rubber 12 and 13; 14 is a purification case that opens at the front and forms an exhaust port 15 at the rear; 16 is 0.3
It is a Hepa filter made of glass fiber that has a collection efficiency of 99.99% of micron dust, and as shown in Figure 2, it is folded into many jagged pieces, and the periphery is glued and fixed with a holder 17 such as an iron plate to form a square lunch box as a whole. It is installed inside the purification case 14 in the shape of .
18 is a holding plate with an opening in the center that holds the Hepa filter 16; 19 is a holder 17 and holding plate 1;
8, a first gasket forming an airtight seal; 20, a second gasket disposed between the HEPA filter 16 and the exhaust port 15;
As shown in FIG _.
When the thickness of the second charged filter 20 is _t1 , it is always set to _t1 > _t2 . This purification case 1
4 is installed in the exhaust gas passage port 3 of the main body case 1 via a second gasket 21. 2
2 and 23 are casters and running wheels for moving the main body.

The operation of the vacuum cleaner with the above configuration will be explained. When the main body switch (not shown) is turned on, the dust sucked from the floor brush and hose (not shown) flows into the paper bag 9 through the suction port 7, and most of the dust is filtered out by the paper bag 9. . The filtered air passes through a first charged filter 10 located at the rear.
The fine dust is further filtered and passed through the blower motor 11 into the purification case 14 through the exhaust gas conduit 3, and the fine dust and carbon powder from the blower motor 11 are also filtered together by the Hepa filter 16. This filtered air is further filtered by a charging filter 20 and then exhausted to the outside of the main body through an exhaust port 15.

The vacuum cleaner configured as described above has 9 paper bags.
Most of the dust is collected, and fine dust of several microns is collected by the Coulomb force of the first charged filter 10 attached to the rear of the paper bag 9. However, even with the first charged filter 10, the collection efficiency of fine dust of 1 micron or less is low, and in the past, it was exhausted into the atmosphere together with the carbon of the blower motor 11.
Since the Hepa filter 16 is attached behind the filter, the efficiency of collecting fine dust and carbon of 1 micron or less is extremely high. Further, since the Hepa filter 16 is folded in a jagged manner, a large area can be ensured in relation to its volume, so that pressure loss is small, clogging due to fine dust is small, and exhaust gas can be cleaned without reducing suction power as a cleaner. Next, since the first charged filter 10 is disposed in front of the blower motor, the first charged filter 10
Collects fine dust of microns or larger. Fine dust of 1 micron or less is mainly collected by the Hepa filter 16.

Furthermore, the hepafilter 16 is folded into jagged pieces,
The thickness of the second charged filter 20 behind it is t ₁ >
Since the relationship is set to t ₂ , the ridgeline of the jagged Hepa filter 16 is the second charged filter 2.
0, the second charged filter 20 can compensate for slight damage caused when the Hepa filter 16 is folded. The first and second charged filters 10 and 20 do not need to be charged filters, and the same effect can be obtained as long as they are elastic and breathable filters.

FIG. 4 is a characteristic diagram showing the effect of this embodiment, in which the horizontal axis shows the particle size (μm) of dust and the vertical axis shows the number of leaking dust. In the figure, a is a characteristic diagram showing atmospheric dust concentration, b is a characteristic diagram of a conventional vacuum cleaner equipped with a charged filter, and c is a characteristic diagram of an embodiment of the present invention having a Hepa filter and a charged filter. It can be seen from the characteristic diagram c that fine dust of 1 micron or less is effectively collected.

〔Effect of the invention〕

As described above, according to the present invention, since the Hepa filter is provided behind the blower motor, the performance of collecting exhaust dust can be improved, and since the Hepa filter is folded into jagged pieces, a large filter area can be secured. The pressure drop is small, and clogging caused by fine dust can be reduced.

Furthermore, since the charged filter is removably provided in front of the Hepa filter, slightly larger particles can be collected by the charged filter, and the time for the Hepa filter to become clogged can be extended.

Furthermore, by providing an elastic filter at the rear of the Hepa filter so as to press it with the ridgeline of the Hepa filter, even if there is slight damage to the bent part of the Hepa filter, the elastic filter provided at the rear It can be captured with a filter.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention;
Figure 2 is a sectional view taken along the - line in Figure 1;
This figure is a main sectional view of the hepafilter portion in FIG. 2, and FIG. 4 is a characteristic diagram showing the effects of the present invention. In the figure, 7 is a suction port, 9 is a paper bag, 10 is a charging filter, 11 is a blower motor, 15 is an exhaust port, 16
is a hepafilter, and 20 is an elastic filter.
In addition, in the figures, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims] 1. In a vacuum cleaner that houses a blower motor, has a dust collection chamber containing a paper bag on the suction side of the blower motor, and has a suction port and an exhaust port of the blower motor on the suction side of the dust collection chamber, in front of the blower motor. a first charged filter is removably provided in the
A vacuum cleaner characterized in that a Hepa filter folded in a jagged manner is provided at the rear of a blower motor, and a second elastic charging filter is provided at the rear of the Hepa filter and is pressed by a ridgeline portion of the Hepa filter.