JPH09154784A - Vacuum cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make the collection of each dust excellent and to make the long- term use possible by composing a vacuum cleaner of two-stage filters, a filter for fine dust disposed in the front stage of a discharge port and a filter for microfine dust disposed in the rear stage thereof as well. SOLUTION: An exhaust gas-filtering device is constituted of two-stage filters, a multicyclone dust collector 11 as a filter part in the front stage and a HEPA filter dust collector 12 in a filter part in the rear stage thereof (an exhaust part of the filter part in the front stage) in order to efficiently collect dust in an exhaust gas wind contng. dust raised out of a motor-driven fan 7. Then, the purified air only is discharged out of the discharge port 23 disposed on the bottom surface of a main body case 1 at the lower part of the vacuum cleaner main body after dust has been collected. In such way, the collection of fin dust in the exhaust gas and, further, the unnecessity of an increase in the pressure loss against the quantity of collection which are the features of the cyclone and exceptionally excellent dust collecting capacity larger tan that of a fabric filter are attained, therefor, the need for disposal and exchange until the service life of the vacuum cleaner is eliminated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric vacuum cleaner having a dust collecting chamber having a suction port in a cleaner body, and an electric blower storage chamber having an exhaust port for accommodating an electric blower. In particular, the present invention relates to an electric vacuum cleaner having an exhaust gas cleaning structure.

[0002]

2. Description of the Related Art In a conventional vacuum cleaner of this type, as shown in FIG. 5, a fibrous exhaust filter 25 is provided adjacent to an exhaust port 23 at the rear of a main body case provided in the rear direction of the electric blower 7. It is a one-stage installation. In FIG. 5, 3 is a partition wall, 4 is a dust collection chamber, 5 is an electric blower chamber, 6 is a suction port, 8 is a cord reel winding device, 10 is a paper bag,
24 is a wheel.

Further, Japanese Patent Laid-Open No. 49-100851,
JP-A-49-100852, JP-A-57-145
An electric vacuum cleaner has been proposed in which a multi-cyclone and a cyclone dust collecting device as described in Japanese Patent No. 636 are provided in the front stage (suction side) of an electric blower.

[0004]

In the case of the conventional electric vacuum cleaner configured as shown in FIG. 5, it is necessary to catch all the exhaust dust in the electric blower housing chamber with the single-stage exhaust filter. Therefore, it is necessary to improve the fiber density of the exhaust filter in order to capture even the area of fine dust with the exhaust filter of one stage, and when the fiber density of the exhaust filter is improved, the exhaust filter is clogged quickly and frequently. There is a problem that sufficient performance cannot be obtained unless the filter is replaced.

Further, taking the above points into consideration, if the area where the dust is captured by the exhaust filter is the area of fine dust, the fiber density of the exhaust filter can be made coarser than that of the exhaust filter that captures the area of fine dust. However, there is a problem in that it is not possible to capture fine dust, and because of the nature of this type of exhaust filter, it is necessary to replace it while the amount of dust is small because it is trapped in the filter fiber.

[0006] Furthermore, JP-A-49-100851, JP-A-49-100852, and JP-A-57-
Since the multi-cyclone and the cyclone dust collecting device described in Japanese Patent No. 145636 are provided in the dust collecting portion of the electric vacuum cleaner (that is, the suction side of the electric blower), the cyclone (including the multi-cyclone) dust collecting device has an air flow. There is a problem in that the pressure loss becomes large because it becomes an inversion type cyclone, and the suction force (suction work rate), which is the basic performance of the electric blower, is reduced by about 100 watts (W) or more as compared with the conventional paper bag dust collection.

Further, when a cyclone dust collector is provided in the dust collector of the electric vacuum cleaner, as described in JP-A-49-100851 and JP-A-49-100852,
Even if a primary filter is provided in the preceding stage of the cyclone, the particle size distribution of dust input to the cyclone dust collector is about 1
Since it is in the range from 00 micron (μm) to submicron, even if the cyclone outer cylinder diameter is reduced to reduce the separation diameter of the cyclone like a multi cyclone dust collector, collision between particles having the above particle size distribution, Due to the repulsion, the particle swirl speed in the cyclone dust collector is converged to a large particle diameter, which causes a problem that the dust collection efficiency decreases.

In order to solve the above problems, the present invention provides an exhaust filter for an electric vacuum cleaner which traps exhaust dust discharged from the electric vacuum cleaner to a fine dust region and can be used for a long period of time. The purpose is to provide an electric vacuum cleaner equipped with it.

[0009]

The electric vacuum cleaner of the present invention comprises:
It is a solution to the above-mentioned problems, that is, dust that has leaked from the paper bag by mounting a conventional paper bag in the dust collecting part of the vacuum cleaner,
An exhaust filter device is provided in the exhaust portion of the electric vacuum cleaner in order to collect dust in the region of particle size distribution from about 5 microns to submicron. Also, an exhaust filter device is provided in the exhaust portion of the electric vacuum cleaner. When provided, even if the pressure loss due to the exhaust filter is large, the influence on the suction force (that is, suction power) of the vacuum cleaner is about 5 watts or less, which is very small.

The exhaust filter has a two-stage filter structure, and a large amount of dust is trapped for capturing fine dust as a pre-stage filter.
In addition, it is equipped with a cyclone dust collector with less pressure loss due to the amount of dust trapped. In addition, the cyclone dust collector is designed to reduce the diameter of the outer cylinder of the cyclone in order to improve the efficiency of capturing fine dust. The particle size distribution of the dust input to the dust device is in the range of about 5 microns to sub-micron as shown above, so the collision and repulsion by large particles are very small, and the dust collection efficiency is improved.) And cyclone collection In order to reduce the initial pressure loss of the dust device, a plurality of axial flow straight-type cyclones are connected in parallel, and in order to reduce the variation in individual pressure loss of the multi-cyclone at each cyclone inlet, a horn-shaped multi-cyclone exhaust intake port Is provided.

Further, the dust collecting container is made common by miniaturizing the cyclone outer cylinder, and the exhaust portion of the cyclone dust collector is used as a post-filter to detect fine dust, and is a fibrous HEPA (High Efficiency). Pa
The rticulate air) filter is installed to capture only the fine dust in the submicron region that leaked from the previous multi-cyclone dust collector.

In the vacuum cleaner of the present invention having the above-mentioned construction, the exhaust force from the electric blower leaking from the paper bag is targeted instead of the dust collecting part of the vacuum cleaner. Rate), the pressure loss is not affected by the amount of fine dust that is about 90% or more of the exhaust dust from the electric blower, and the dust is collected by the multi-cyclone with a large dust container. It is also possible to add H
Dust can be captured with an EPA filter.

Therefore, since the dust collection target of each exhaust filter is limited, the performance of each exhaust filter can be maximized.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of an electric vacuum cleaner according to the present invention will be described below with reference to FIGS. 1 to 4, and the same parts as those of the conventional example will be designated by the same reference numerals. FIG. 1 shows a main body of an electric vacuum cleaner, and the main body case includes an upper main body case 2 which is fixedly connected to an upper side of a lower main body case 1 and whose lower surface is opened.

The inside of the main body of the electric vacuum cleaner is divided into front and rear by a partition wall 3 having a passage opening as shown in FIG. 2, and a space portion in front of the partition wall 3 is a dust collecting chamber 4. At the same time, the space on the rear side is the electric blower chamber 5. In addition, a suction port 6 is formed in the main body of the electric vacuum cleaner so that the dust collection chamber 4 communicates with the outside and one end of a suction hose is detachably connected.

A paper bag 10 for accommodating the collected dust is installed in the dust collecting chamber 4. further,
In the electric blower room 5 at the rear of the electric vacuum cleaner body,
An electric blower 7, a cord reel winding device 8 and an exhaust filter device 9 are installed.

In the flow of the air flow by the electric blower 7, air containing a large amount of dust is first sucked into the paper bag 10 in the dust collecting chamber 4 from the suction port 6, and the paper bag 10 captures dust with a large particle size. Then, the dust that cannot be captured by the paper bag 10 passes through the partition wall 3 and is sucked toward the electric blower 7 side. The dust-containing air sucked by the electric blower 7 is discharged from the electric blower 7 as it is and reaches the exhaust filter device 9.

As shown in FIG. 1, the exhaust filter device 9 has a multi-cyclone dust collecting device 11 as a pre-stage filter part in order to efficiently capture dust of exhaust air including dust from the electric blower 7. , The HEPA filter dust collector 1 in the subsequent filter section (exhaust section of the preceding filter section)
The two-stage filter structure of No. 2 is used, and after the dust is captured, the exhaust port 23 provided on the bottom surface of the lower main body case 1 of the vacuum cleaner main body
It is a structure that exhausts only clean air purified from the vacuum cleaner body.

FIG. 3 shows the detailed construction of the exhaust filter device 9. In FIG. 3, as described above, in the exhaust gas filter device 9, a multi-cyclone dust collecting device 11 is constituted by a plurality of small cyclone dust collecting devices 13 arranged in parallel as a filter part of the preceding stage, and the multi-cyclone dust collecting device 11 is provided. A multi-cyclone exhaust intake 14 is provided to take in the exhaust from the electric blower 7.

The multi cyclone exhaust intake port 14
As shown in FIG. 4, each of the plurality of small cyclone dust collectors 13 comprises a cyclone inlet 15, an exhaust introduction pipe 16, and an exhaust introduction horn 17. The exhaust introduction horn 16 is provided on the direction surface of the multi-cyclone exhaust intake 14 that faces the exhaust direction from the electric blower 7, and the exhaust from the electric blower 7 is efficiently supplied to each small cyclone dust collector 13. Arrangement in multiple rows and multiple columns (2 in the embodiment of FIG. 3) so that data can be input.
A 6-column arrangement is shown. ).

The exhaust gas introduced from each exhaust gas introduction horn 17 passes through each exhaust gas introduction pipe 16 and is input to each small cyclone dust collector 13. Further, the dust-containing air input to each small cyclone dust collector 13 is forcibly swirled by the inner wall surface of the cyclone cylinder 19 and the air flow swirl assisting device 18, as shown in FIG. Since the diameter of the cyclone cylinder 19 is as small as 16 mm in the experiment, the swiveling speed is very high, and fine dust can be separated.

Then, the separated fine dust is the cyclone cylinder 1
It is guided to the inner wall of 9 and while reaching the cyclone dust collecting container 20 connected to the lower part of the cyclone cylinder 19 while swirling the wall surface, it is stored. Further, the cyclone dust collecting container 20 is not arranged individually for each small cyclone dust collecting device 13, but is made common to fix the lower part of each small cyclone 13 and expand the dust collecting amount. With the above configuration, fine dust and air are separated, and the air is cyclone cylinder 19
Is discharged through each cyclone exhaust pipe 21 having a common tube axis.

As described above, by mounting the multi-cyclone dust collecting device 11 as the preceding filter unit, fine dust in the exhaust gas is captured and the pressure loss increases with respect to the amount of dust collected, which is a feature of the cyclone. Since the dust collection amount is far superior to the fibrous filter and the storage capacity is far superior, it is not necessary to dispose of or replace the vacuum cleaner until its usage period (product life).

Further, in the multi cyclone dust collecting apparatus 11, since the pressure loss of the air flow becomes large when the cyclone cylinder 19 is downsized, a large number of small cyclone dust collecting apparatuses 13 are connected in parallel (in FIG. 3, 12 pieces are connected in parallel). By using a multi-cyclone, it is possible to reduce the pressure loss while improving the efficiency of capturing fine dust.

As a method for arranging a plurality of the small cyclone dust collectors 13 in parallel, the front and rear two stages and the six columns are arranged.
It is possible to reduce the mounting space of the multi-cyclone dust collector 11. (In this embodiment, the number of parallels is 12, but the combination is possible depending on the number of parallels or the mounting space.) Exhaust from the multi-cyclone dust collector 11 as the filter unit of the preceding stage, that is, each cyclone exhaust. Tube 2
The exhaust from 1 contains only a few very small fine dusts.

In order to effectively guide the exhaust gas to the HEPA filter dust collector 12 in the subsequent stage, the HEPA filter dust collector 12 is hermetically sealed under the cyclone dust collector 20.
Is connected to the exhaust duct 22 for connection. The exhaust duct 22 guides the exhaust gas from the multi-cyclone dust collector 11 in the front filter unit to the HEPA filter dust collector 12 in the rear filter unit without leaking outside.

The latter filter section is a highly efficient fibrous HEPA filter dust collector 12 for capturing fine dust, and is installed on the surface facing each cyclone exhaust pipe 21.
Since the target dust to be captured by the HEPA filter dust collector 12 is only a very small amount of fine dust,
The A filter dust collector 12 can selectively collect dust suitable for the characteristics, and can keep the excellent characteristics with less clogging for a long period of time.

With the above configuration, the H of the filter unit at the subsequent stage is
The exhaust gas that has passed through the EPA dust collector 12 becomes a highly purified exhaust gas, and is exhausted to the outside of the electric vacuum cleaner body from the exhaust port 23 of the electric vacuum cleaner body.

In the above embodiment, the case where the exhaust port 23 is provided at the bottom rear part of the vacuum cleaner main body has been described, but it may be provided at the rear surface or upper part of the main body of the vacuum cleaner.
Further, in the above embodiment, the case where the exhaust filter device is divided into the front and rear filter parts and is installed inside the electric vacuum cleaner body in an integrated configuration has been described.
The vacuum cleaner may be configured to be externally attached to the exhaust portion of the conventional vacuum cleaner main body, and in the above-described embodiment, since the current multi-cyclone dust collector has a dust collecting characteristic up to a fine dust region, fine dust is not generated. Although a HEPA dust collector is provided in the latter stage for dust collection, a one-stage configuration is possible as long as the dust collection characteristics of the multi-cyclone dust collector can be captured in the fine dust region. It is not limited.

[0030]

Since the electric vacuum cleaner of the present invention has the above-mentioned structure, in the invention of claim 1, the exhaust filter is provided with the fine dust filter in the front stage and the fine dust filter in the rear stage. It is possible to employ a filter that is excellent in catching dust with respect to each dust, and it is possible to provide an effective exhaust filter.

Further, in addition to the effect of the invention described in claim 1, in the invention described in claim 2, by using the cyclone dust collector as the fine dust filter in the preceding stage, the pressure loss is irrespective of the amount of collected dust. Therefore, it is possible to provide a dust collecting apparatus that has less dust and has a stable dust collecting efficiency.

In the invention according to claim 3,
In addition to the effect of the invention described in claim 2, the cyclone inlet total area is improved, and the exhaust air from the electric blower can be effectively guided to the fine dust filter in the preceding stage. Further, in the invention of claim 4, in addition to the effect of claim 2 or claim 3, the pressure loss of each of the small cyclones for capturing fine dust is totally (as a filter for fine dust in the preceding stage) the total pressure. The loss can be reduced and the dust collection efficiency can be improved.

Further, in the invention according to claim 5,
In addition to the effect of the invention according to claim 4, in addition to the large dust collection capacity, it is not possible to increase the dust collection capacity in the individual dust collection containers for each small dust-collecting cyclone, but the common use increases the dust collection capacity. In addition, it can be used without sufficiently collecting and exhausting dust during the product life period, and can also have the one-end holding function of each small cyclone.

Further, in the invention described in claim 6, in addition to the effect described in claim 4, an exhaust duct is provided in addition to the case of the vacuum cleaner body, so that after the passage of the fine dust filter of the preceding stage. The exhaust gas can be effectively guided to the fine dust filter in the subsequent stage. According to the invention of claim 7, in addition to the effect of claim 6, the exhaust gas guided to the exhaust duct is efficiently guided to the fine dust filter in the subsequent stage without leaking to the outside of the exhaust filter dust collector. be able to.

According to the invention of claim 8,
In addition to the effect according to claim 7, it is possible to efficiently capture a small amount of fine dust that has passed from the fine dust filter in the front stage, and the life of the fine dust filter in the rear stage, that is, clogging. It can be reduced.

[Brief description of the drawings]

FIG. 1 is a cross-sectional front view of a main part of an electric vacuum cleaner according to an embodiment of the present invention.

FIG. 2 is a cross-sectional configuration diagram of essential parts showing an embodiment of the electric vacuum cleaner of the present invention.

FIG. 3 is a perspective view of a main part of the exhaust dust collector of FIG.

FIG. 4 is a perspective view of a main part of the small cyclone dust collector of FIG.

FIG. 5 is a cross-sectional front view of essential parts showing an embodiment of a conventional electric vacuum cleaner.

[Explanation of symbols]

 1 Lower Body Case 2 Upper Body Case 3 Partition Wall 4 Dust Collection Room 5 Electric Blower Room 6 Suction Port 7 Electric Blower 8 Cord Reel Winding Device 9 Exhaust Filter Device 10 Paper Bag 11 Multi-Cyclone Dust Collection Device 12 HEPA Filter Dust Collection Device 13 Small cyclone dust collector 14 Multi-cyclone exhaust intake port 15 Cyclone inlet 16 Exhaust introduction pipe 17 Exhaust introduction horn 18 Air flow swirling auxiliary device 19 Cyclone cylinder 20 Cyclone dust collecting container 21 Cyclone exhaust pipe 22 Exhaust duct 23 Exhaust port 24 Wheel 25 Exhaust filter

Claims (8)

[Claims] 1. An electric vacuum cleaner comprising: a dust collecting chamber having a suction port in a cleaner body; and an electric blower storage chamber having an electric outlet for accommodating an electric blower, and a front stage of the exhaust port. An electric vacuum cleaner having a two-stage filter structure in which a fine dust filter and a fine dust filter are provided in the rear stage. 2. The electric vacuum cleaner according to claim 1, wherein a cyclone dust collector is used for the fine dust filter, and pressure loss due to dust trapped by the fine dust filter is reduced. 3. The vacuum cleaner according to claim 2, wherein the cyclone dust collector has a plurality of cyclone inlets arranged in series and in parallel in order to effectively guide the exhaust gas to the cyclone dust collector. 4. The cyclone dust collecting apparatus according to claim 2 or 3, wherein the cyclone dust collecting apparatus is of a multi-cyclone type in which a plurality of corresponding cyclone dust collecting apparatuses are provided at a plurality of cyclone inlets. Vacuum cleaner. 5. The electric vacuum cleaner according to claim 4, wherein a plurality of cyclone cylinders of the cyclone dust collector are formed, and the cyclone dust collector is common to the dust collecting container of the cyclone dust collector. 6. The electric vacuum cleaner according to claim 4, further comprising an exhaust duct for guiding the exhaust of the plurality of cyclone dust collectors connected in parallel to the fine dust filter. 7. The electric vacuum cleaner according to claim 6, wherein one end of the exhaust duct is in contact with an exhaust portion of the cyclone dust collector, and the other end is in contact with a fine dust filter. 8. The vacuum cleaner according to claim 7, wherein the fine dust filter is a HEPA filter.