JP2009142355A - Vacuum cleaner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vacuum cleaner of which suction force is hardly reduced even when dust is sucked, while securing high suction power. <P>SOLUTION: The vacuum cleaner includes an electric blower 21, a dust separation part 23 installed on the upstream side of the electric blower 21 for introducing air containing dust sucked by the electric blower 21, a dust storage part 24 for storing the dust separated in the dust separation part 23, and suction means connected with the dust storage part 24, for sucking the dust separated in the dust separation part 23 from the dust separation part 23 to the dust storage part 24. The dust separation part 23 is provided with a turning air flow ventilation path for making the air containing the dust introduced from a suction port 6 flow as a turning air flow, a dust removing filter 27a for forming at least a part of the turning air flow ventilation path, and a space where the suction force of the electric blower 21 acts is provided on the outer periphery of the dust removing filter 27a. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a vacuum cleaner using a dust collection case that can be used repeatedly.

Conventionally, in this type of vacuum cleaner, a special swirling air flow is generated in the dust collecting case, dust is separated by centrifugal force from the sucked air flow, and dust is accumulated in the dust collecting case. Those are known (for example, see Patent Document 1).
JP 2000-342492 A

  However, in the conventional configuration, a swirling airflow is generated in the dust collecting case, dust is separated by centrifugal force from the sucked air flow, and dust is accumulated in the dust collecting case. Due to the restriction of ensuring a high suction work rate, the dust cannot be sufficiently centrifuged. Therefore, when dust accumulates in the dust collection case, the accumulated dust itself acts as a filter, so fine dust also adheres to the coarse dust accumulation part, which becomes a ventilation resistance, and the suction force decreases rapidly. Had. In addition, in order to generate a swirling airflow, it is necessary to bend the intake path greatly, and since a swirling flow is also generated during inhalation, the pressure loss in the path from suction to exhaust in the dust collection case increases, and the suction work The problem was that the rate would be low.

  The present invention solves the above-mentioned conventional problems, and provides a vacuum cleaner that secures a high suction work rate and hardly reduces the suction force even when dust is sucked.

  In order to solve the above-described conventional problems, an electric vacuum cleaner of the present invention includes an electric blower, a dust separation unit that is installed upstream of the electric blower and introduces air containing dust sucked by the electric blower, and A dust container for storing the dust separated by the dust separator, and a suction means connected to the dust container for sucking the dust separated by the dust separator from the dust separator to the dust container. The dust separation unit is provided with a swirling air circulation air passage for flowing air containing dust introduced from a suction port as a swirling air current, and includes a dust removal filter that forms at least a part of the swirling air circulation air passage, The vacuum cleaner is provided with a space where the suction force of the electric blower acts on the outer periphery of the filter.

  With such an invention, when air containing dust flows into the dust separator, a swirling airflow is generated in the dust separator. Here, dust flowing in with a swirling component also swirls in the cylindrical hollow portion in the dust removal filter, and coarse dust such as cotton dust and hair descends while swirling in the cylindrical hollow portion in the dust removal filter, and is guided to the dust container. . Further, in the cylindrical hollow portion in the dust removal filter, even if dust adheres to the inner surface of the dust removal filter due to the swirling airflow, it is separated by the swirling airflow, so that dust does not accumulate on the dust removal filter and air permeability can be secured.

  In other words, when air containing dust is introduced into the dust separator and becomes a swirling airflow, coarse dust is separated by the dust separator and accumulates in the dust container, and the suction path from the suction port to the electric blower extends around the dust filter. Secured. Therefore, it can be set as the vacuum cleaner which is excellent in air volume maintenance performance, and does not require a long-term maintenance, without causing the air volume fall.

  Further, in the vacuum cleaner of the present invention, in the air passage from the suction port to the electric blower, dust is separated from the air passage without repeatedly bending, expanding, and contracting the air current. Can be secured.

  Furthermore, the suction means draws coarse dust that has entered the dust container to the dust container, so that the coarse dust is retained in the dust container, and the coarse dust flows back to the dust separator and reattaches to the dust removal filter. It is possible to prevent the air volume from being lowered.

  Therefore, the vacuum cleaner of the present invention can provide a vacuum cleaner that does not require maintenance for a long period of time while ensuring a high suction power and is difficult to reduce suction force even when dust is sucked.

  The vacuum cleaner of the present invention can provide a vacuum cleaner that does not require maintenance for a long period of time while ensuring a high suction work rate, and is difficult to reduce suction force even when dust is sucked.

  A first aspect of the invention is an electric blower, a dust separation unit that is installed upstream of the electric blower and introduces air containing dust sucked by the electric blower, and dust that contains the dust separated by the dust separation unit A swirling air circulation airflow path for flowing air containing dust introduced from the suction port as a swirling airflow; and a swirling air circulation airflow, comprising: a housing portion; and suction means communicating with the dust housing space. A vacuum cleaner comprising a dust removal filter that forms at least a part of a path, a space where the suction force of an electric blower acts on the outer periphery of the dust removal filter, and the dust is retained in the dust container by the suction action of the suction means .

  With such an invention, when air containing dust flows into the dust separator, a swirling airflow is generated in the dust separator. Here, dust flowing in with a swirling component also swirls in the cylindrical hollow portion in the dust removal filter, and coarse dust such as cotton dust and hair descends while swirling in the cylindrical hollow portion in the dust removal filter, and is guided to the dust container. .

  Further, the cylindrical hollow portion in the dust removal filter peels off even if dust adheres to the inner surface due to the swirling airflow, so that dust does not accumulate on the dust removal filter and air permeability can be secured. That is, even if the dust is sucked, the dust accumulates in the dust container, and a suction path from the suction port to the electric blower is secured around the dust filter. Therefore, it can be set as the vacuum cleaner which is excellent in air volume maintenance performance, and does not require a long-term maintenance, without causing the air volume fall.

  Further, in the vacuum cleaner of the present invention, in the air passage from the suction port to the electric blower, dust is separated from the air passage without repeatedly bending, expanding, and contracting the air current. Can be secured.

  Furthermore, the suction means draws coarse dust that has entered the dust container to the dust container, so that the coarse dust is retained in the dust container, and the coarse dust flows back to the dust separator and reattaches to the dust removal filter. It is possible to prevent the air volume from being lowered.

  Therefore, the vacuum cleaner of the present invention can provide a vacuum cleaner that does not require maintenance for a long period of time while ensuring a high suction power and is difficult to reduce suction force even when dust is sucked.

  The second aspect of the invention is a vacuum cleaner provided with dust mixture preventing means for preventing dust from entering the suction means, particularly on the upstream side of the suction means in the first invention.

  By such an invention, it is possible to prevent the performance of the suction means from being deteriorated due to the dust being mixed into the suction means, and to reliably keep the dust in the dust container, and to prevent the dust from being reattached to the dust removal filter. It is possible to provide a vacuum cleaner that suppresses the decrease in air volume and is excellent in air volume maintenance performance.

  The third invention is an electric vacuum cleaner in which the dust removal filter in the first or second invention is provided over the entire circumference of the swirling air circulation air passage.

  By such an invention, the suction path from the suction port to the electric blower is ensured over the entire circumference of the dust filter, so that the air volume maintenance performance is excellent without incurring a further reduction in the air volume, and maintenance is unnecessary for a long period of time. Can be a machine.

  The fourth invention is an electric vacuum cleaner in which the dust container in the first to third inventions is provided below the dust filter.

  By such an invention, coarse dust such as cotton dust and hair can descend while turning the cylindrical hollow portion in the dust removal filter, and can be more efficiently guided to the dust container.

  The fifth aspect of the invention is a vacuum cleaner in which the swirling air circulation air passage in the first to fourth inventions has a substantially cylindrical shape, and the suction port is configured in the tangential direction of the substantially cylindrical air of the swirling air circulation air passage.

  According to such an invention, when air containing dust flows in from the tangential direction when flowing into the dust separating portion, a swirling airflow can be generated more strongly in the dust separating portion.

  In the sixth aspect of the present invention, a main air passage in which the suction force of the electric blower acts on the outer periphery of the dust filter is formed in the space provided on the outer periphery of the dust filter in the first to fifth aspects of the invention. Machine.

  According to such an invention, in the air passage from the suction port to the electric blower, dust is separated from the air passage without repeatedly bending, expanding, or reducing the abrupt air current, so that a high suction work rate is ensured over a long period of time. Can do.

  Embodiments of the present invention will be described below with reference to the drawings. Note that the present invention is not limited to the present embodiment.

(Embodiment 1)
1 and 2 show a vacuum cleaner according to Embodiment 1 of the present invention.

  As shown in FIG. 2, an electric blower 21 that generates a suction airflow is built in the vacuum cleaner body 1, and wheels 3 and casters 4 are attached to the outside of the vacuum cleaner body 1. The floor can be moved freely. Further, on the upstream side of the electric blower 21, a dust collection case 5 for introducing air containing dust sucked by the electric blower 21 is detachably attached to the electric vacuum cleaner main body 1 through a partition wall 26 having air permeability. is set up.

  The dust collecting case 5 has a shape in which a plurality of hollow cylinders having different diameters are connected in multiple stages. In the first embodiment, the dust collecting case 5 has a three-stage configuration, and from the upper stage, the case upper part 22a, the case central part 22b, The case upper portion 22a and the case center portion 22b serve as a dust separation portion 23, and the case upper portion 22a is provided with a suction port 6 for introducing air containing dust from the tangential direction. Yes.

  The dust collection case 5 communicates from the suction port 6 to the dust container 24 for depositing the lowest level dust, and the air path from the suction port 6 to the electric blower 21 is connected to the dust separation unit 23 of the dust collection case 5. The opening 25 provided is formed so as to communicate with the partition wall 26 of the vacuum cleaner body 1. Furthermore, a cylindrical dust removal filter 27 is installed in the dust separation unit 23.

  The dust container 24 is communicated with the suction means 28 via the connecting portion 10, and the dust mixing preventing means 11 prevents dust from entering the suction means 28 upstream of the suction means 28 and in the connecting portion 10. Is provided.

  Further, as shown in FIG. 1, a suction hose 7 and an extension pipe 8 are sequentially connected to the suction port 6, a suction tool 9 is attached to the tip of the extension pipe 8, and the electric blower 21 is operated. The dust on the floor in the house can be sucked.

  In the first embodiment, the cylindrical dust removal filter 27 includes a cylindrical first dust removal filter 27a formed of a coarse dust filter on the upstream side and a finer filter provided on the outer periphery on the downstream side of the first dust removal filter. It is comprised from the two-layer structure with the cylindrical 2nd dust removal filter 27b which consists of dust filters.

  The ventilation portions of the first dust removal filter 27a and the second dust removal filter 27b are arranged in the middle of a main air passage (first air passage) 29a in which the suction port 6 of the dust collecting case 5 and the electric blower 21 communicate with each other. is doing.

  A main air passage (first air passage) 29a from the suction port 6 to the electric blower 21 is provided over the entire space from the first dust removal filter 27a to the outer periphery of the second dust removal filter 27b.

  Next, details of the dust collection case 5 and the cylindrical dust removal filter 27 will be described with reference to FIGS. 3 (a), 3 (b), 3 (c), and 3 (d).

  As shown in FIG. 3 (a), the dust collecting case 5 has a shape in which vertical hollow cylinders are arranged in three stages, and the suction port 6 is a circle of the case upper portion 22a as shown in FIG. 3 (c). It arrange | positions in the eccentric position so that airflow may flow in from the tangential direction of a circumferential cross section. In the first embodiment, the dust collecting case 5 is a hollow cylinder, but the cylinder is not limited to a perfect circle, and may be an elliptical shape, a polygonal shape such as an octagonal shape or a decagonal shape. The inflow airflow should just be a shape which a whirling airflow produces along the inner surface of the dust collection case 5. FIG. Similarly, in the cylindrical dust removal filter 27, the cylinder is not limited to a perfect circle, and may be an elliptical shape, a polygonal shape such as an octagonal shape or a 10-sided shape shape, and is generated along the inner surface of the dust collecting case 5. It is sufficient that the swirling airflow has a shape that can be generated in the cylindrical hollow portion of the first dust filter 27a.

  Therefore, the swirling air circulation airflow path is a passage that forms the swirling airflow generated along the inner surface of the case upper portion 22a in the dust separation portion 23 and the swirling airflow generated in the cylindrical hollow portion of the first dust removal filter 27a. .

  In addition, the suction port 6 provided in the case upper portion 22a is arranged at the lower end of the suction port 6 from the upper end of the opening 25 provided in the dust separation unit 23 so that the generated swirling airflow is generated in the direction of the dust container 24. Is arranged so as to be on the upper side. In this way, by arranging the position of the suction port 6 higher than the opening 25, the air introduced from the suction port 6 in the tangential direction of the case upper portion 22a is the dust that is downward due to the suction force action on the opening 25 side. Generated as a swirling airflow in the direction of the accommodating portion 24. Due to the swirling airflow that continues to descend while turning, the coarse dust 52 such as cotton dust receives the wind pressure and turns down to be guided to the dust container 24.

  A dust container 24 for accumulating the sucked dust is provided at the lower part of the dust collecting case 5, and the dust container 24 is connected to the suction means 28 via the connecting part 10. The second air passage 29b is formed by the action. The suction means 28 is composed of a small fan motor, and draws the coarse dust that has entered the dust container 24 toward itself.

  In addition, a filter for preventing dust from entering the suction means 28 is provided as the dust mixture prevention means 11 in the connecting portion 10 that connects the suction means 28 and the dust container 24. Here, as the dust mixing preventing means 11, a non-woven fabric member made of the same material as that of the second dust removing filter 27b for removing fine dust is used.

  Further, the bottom surface of the dust collecting case 5 on the dust container portion 24 side is an open / close lid 31, which is configured to open the open / close lid 31 via a hinge 32 and discharge the dust in the dust container portion 24. .

  The dust collecting case 5 is made of acrylic resin in the first embodiment, but at least part of the dust collecting case 5 is made of a see-through member, so that the amount of dust inside can be easily confirmed visually from above. Therefore, it is preferable. As the transparent member, ABS, polypropylene, acrylic resin and the like are easily available as a member, which is preferable in terms of good workability.

  Further, as shown in FIG. 3B, the outer wall between the dust collection case 5 and the cylindrical dust filter 27 is formed on the inner wall between the suction port 6 of the cylindrical dust collection case 5 and the dust container 24. A space portion 33 provided around the periphery is formed, and the inside of the dust collecting case 5 and the suction port of the electric blower 21 communicate with each other through the space portion 33.

  Further, the inner surface of the case upper portion 22 a of the dust collection case 5 forms one surface as a whole with the inner surface of the inner first dust removal filter 27 a constituting the cylindrical dust removal filter 27. That is, there is no protrusion protruding on the inner surface of the dust collecting case 5.

  As shown in FIG. 3D, the cylindrical dust removal filter 27 has a cylindrical shape so as to surround the inside of the cylindrical dust collecting case 5. The first dust removing filter 27a composed of a coarse dust filter located upstream from the suction airflow removes relatively large dust such as cotton dust and hair from the dust in the suction airflow. The second dust removing filter 27b made of a fine dust filter located in the position removes dust, such as fine dust particles such as sand dust, pollen, and mite feces, from the airflow.

  Thus, by providing a plurality of layers of cylindrical dust removal filters 27 according to the size of dust to be removed, the frequency of clogging of the dust removal filter can be reduced and the air flow sustaining performance can be extended. It does not matter.

  As the first dust removing filter 27a, it is preferable to use a member having a relatively large hole diameter through which fine dust such as sand dust can pass, such as a metal mesh, punching metal, resin mesh, and the like in the first embodiment. A metal mesh having a pore diameter of 250 microns is used to minimize the fine protrusions on the inner surface of the first dust filter 27a.

  On the other hand, as the filter used in the second dust removal filter 27b and the dust mixing preventing means 11, a nonwoven fabric, pulp, glass fiber, HEPA filter, etc. can be used, but a nonwoven fabric member that can remove relatively fine particles efficiently. By connecting the pleated and folded pleated members and installing them in a cylindrical shape, dust removal performance can be ensured while reducing ventilation resistance. In addition, it is more preferable to use a filter in which a dust-adhering surface is coated with a porous PTFE member that has good dust separation, because clogging of the filter can be suppressed.

  FIG. 4 is an enlarged cross-sectional view of a main part of the second dust filter 27b shown in FIG.

  In the first embodiment, as shown in FIGS. 3D and 4, in particular, a sheet-like filter in which a PTFE film having a vent hole diameter of about 0.5 microns is made rigid with PET resin is pleated. A fold-folded filter 41 is used in which both ends are connected to form a cylinder.

  In addition, in the outer peripheral portion of the fold-folded filter 41, the indented portion 42 on the inner surface of the fold-shaped member that corresponds to the upstream side of the suction airflow has a substantially U-shaped roundness of about R = 2 to 5 mm. Note that the folds on the side close to the first dust removal filter 27a of the fold-fold filter 41 are not particularly provided with a recessed portion.

  Further, the outside of the fold-folded filter 41 that is the second dust removing filter 27b is provided with a seal portion 43 that is sealed with a resin, a sealant, or the like only within a range of several millimeters at the upper end and the lower end. Air permeability is blocked.

  About the vacuum cleaner of this Embodiment 1 comprised as mentioned above, the operation | movement is demonstrated based on Fig.5 (a), (b), (c).

  When the electric blower 21 is started to operate, a suction airflow is generated, and dust from the floor surface is sucked into the dust collecting case 5 through the suction tool 9, the extension pipe 8, and the suction hose 7. At this time, since the suction port 6 of the dust collecting case 5 is installed eccentrically in the tangential direction with respect to the cylindrical cross section, as shown in FIG. It enters from the tangential direction of the cylindrical cross section of the case 5 and changes to a swirling airflow.

  Here, since the lower end of the suction port 6 is disposed above the upper end of the opening 25, the airflow flowing from the suction port 6 has a swirling component and also has a downward component. Therefore, the swirling airflow generated in the case upper portion 22a of the dust collecting case 5 continues to descend while swirling and reaches the vicinity of the cylindrical dust removal filter 27. Here, the first dust filter 27a upstream of the cylindrical dust filter 27 does not stop the flow of the swirling airflow because there is no protrusion toward the inside of the dust collecting case 5, and the airflow continues to swirl. However, as shown in FIG. 5 (b), the first dust filter 27 a and the second dust filter 27 b are sequentially passed, and are sucked into the electric blower 21 through the space 33.

  Here, the dust sucked together with the sucked air flow is guided to the cylindrical dust removing filter 27 while turning along with the air flow, and the fine dust 51 such as sand dust among the dust passes through the first dust removing filter 27a. It passes through and is filtered out by the outer second dust filter 27b.

  Further, the coarse dust 52 such as cotton dust that is light in specific gravity and easily receives wind pressure is easily peeled off from the surface of the first dust removing filter 27a by the swirling airflow, and as shown in FIGS. 5 (b) and 5 (c), The turning is continued in the cylindrical hollow portion of the first dust filter 27a. Due to this action, the first dust removing filter 27a has a self-cleaning action due to the airflow, and therefore suppresses a reduction in suction force without clogging.

  Further, when the amount of dust to be sucked increases, coarse dust 52 such as cotton dust descends while turning in the first dust removal filter 27 a and is guided to the dust container 24.

  The coarse dust 52 guided to the dust container 24 is sucked by the suction action of the suction means 28 formed of a small fan motor through the connecting portion 10, while the coarse dust 52 is connected by the dust mixing prevention means 11. Passing through part 10 is prevented. Accordingly, the coarse dust 52 is retained in the dust container 24 and does not return to the upstream dust separator 23 side, and the dust is prevented from reattaching to the first dust filter 27a.

  Further, since a filter for preventing dust from entering the suction means 28 is provided as the dust prevention means 11 in the connecting portion 10 on the upstream side of the suction means 28, the suction means 28 does not contain dust even if it is sucked. Therefore, high suction performance can be maintained over a long period of time.

  From the above, the coarse dust 52 such as cotton dust is swirled and lowered by the swirling airflow, guided to the dust container 24, sucked by the suction means 28, and accumulated in the dust container 24. Since fine dust 51 such as sand dust passes through the holes of the mesh of the first dust removing filter 27a, the first dust removing filter 27a does not accumulate dust and ensures air permeability.

  That is, when dust is sucked, the dust is surely separated into fine dust 51 and coarse dust 52, and the fine dust 51 is filtered by the second dust removing filter 27b, and the coarse dust 52 is captured by the dust container 24. In addition, since the suction path from the suction port 6 to the electric blower 21 is secured around the first and second dust removing filters, it is possible to prevent a decrease in the air volume.

  Further, the dent indented portion 42 on the upstream side of the suction airflow in the second dust removal filter 27b has a substantially U shape and is rounded by about 2R to 5R. Is less likely to adhere and accumulate, and fine dust once accumulated can be easily peeled and removed, thereby preventing a reduction in air volume due to filter clogging.

  Even when the amount of dust in the dust collection case 5 increases, if the opening / closing lid 31 is opened, the dust collection case 5 does not catch any protrusions and the like, so that the dust can be discharged smoothly. Care of the dust case 5 itself is very simple.

  The air quantity maintenance performance evaluation test was performed using the electric vacuum cleaner of the first embodiment. In the experiment method, household dust was separated into cotton dust and fine dust using a sieve, 4 g of cotton dust and 3 g of fine dust were mixed, and 7 g was sucked at a time to examine the change in the air volume. The result is shown in FIG. As a control experiment, a commercially available cyclone vacuum cleaner was used.

  As shown in FIG. 6, in the first embodiment, a high air volume was maintained from the beginning, and 90% or more of the initial air volume was maintained even after suction of 80 g, whereas in the control experiment, the initial air volume was maintained. The air volume was low and the speed of air flow reduction was fast, and it was 80% or less of the initial air volume after sucking 60 g.

  Furthermore, when the suction work rate was measured, the thing of this Embodiment 1 was 100 W or more higher than the thing of the control experiment.

  Thus, in the vacuum cleaner of this Embodiment 1, in the air passage from the suction port to the electric blower, dust is separated from the air passage without repeatedly bending, expanding, and contracting the air current. Can be provided at a high level, and a vacuum cleaner can be provided in which the suction force does not easily decrease even when dust is sucked.

  In the present embodiment, the second dust removing filter 27b is provided on the entire circumference of the first dust removing filter 27a. However, the second dust removing filter 27b is shown in the perspective view of FIG. 7 and the sectional views of FIGS. As described above, even when the second dust removing filter 27b is arranged only on the suction side of the electric blower, the same effect is recognized even if it is not the entire periphery.

  Further, in the present embodiment, as shown in FIGS. 9A and 9B, suction is performed by the suction means 28 from a part of the side surface of the dust container 24 via the connecting portion 10, but FIG. As shown in (b), if suction is performed from the entire peripheral portion of the dust container 24, the coarse dust stored in the dust container 24 can be uniformly sucked from the surroundings, and the effect of preventing the coarse dust from rolling up is obtained. You can improve.

  Furthermore, as shown in FIGS. 11A and 11B, the same effect can be obtained even if suction is performed from the bottom of the dust container 24.

  As described above, the vacuum cleaner according to the present invention can provide a vacuum cleaner in which the suction force is not easily reduced even if dust is sucked while securing a high suction work rate. Maintenance work such as cleaning and dust discharge can be greatly reduced, and it can be used not only for household vacuum cleaners but also for various types of vacuum cleaners such as commercial vacuum cleaners.

Overall view of the electric vacuum cleaner according to Embodiment 1 of the present invention Sectional drawing which shows the structure of the main part of the vacuum cleaner (A) Front sectional view of the dust collecting case of the electric vacuum cleaner (b) Side sectional view of the dust collecting case (c) (b) AA 'sectional view (d) (b) BB' Cross section Sectional drawing of the principal part of the 2nd dust removal filter of the same vacuum cleaner (A) Flat cross-sectional view showing the flow of airflow near the suction port in the dust collection case of the vacuum cleaner (b) Flat cross-sectional view showing the flow of airflow near the dust removal filter in the dust collection case (c) Dust collection Longitudinal sectional view showing the flow of longitudinal airflow in the case Graph showing the relationship between the amount of dust collected from household dust and the change in the intake air volume in the vacuum cleaner and the comparative example Perspective view of another type of dust collecting case of the vacuum cleaner (A) Side sectional view of a dust collecting case of another form of the electric vacuum cleaner (b) C-C 'sectional view of (a) (A) Side sectional view showing that the suction means of the electric vacuum cleaner is connected to a part of the side surface of the dust accommodating part (b) D-D 'sectional view of (a) (A) Side sectional view showing that suction means of the vacuum cleaner is connected to the entire side surface of the dust container (b) E-E 'sectional view of (a) (A) Side sectional view showing that suction means of the vacuum cleaner is connected to the lower surface of the dust container (b) F-F 'sectional view of (a)

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vacuum cleaner main body 5 Dust collection case 6 Suction port 10 Connection part 11 Dust mixing prevention means (filter)
DESCRIPTION OF SYMBOLS 21 Electric blower 23 Dust separation part 24 Dust accommodating part 27 Cylindrical dust removal filter 27a 1st dust removal filter 27b 2nd dust removal filter 28 Suction means 29a Main air path (1st air path)
29b Second air passage 31 Open / close lid 33 Space portion 41 Pleated filter 42 Recess portion 43 Seal portion 51 Fine dust 52 Coarse dust

Claims (6)

An electric blower, a dust separating unit that is installed upstream of the electric blower and introduces air containing dust sucked by the electric blower, a dust containing unit that contains the dust separated by the dust separating unit, and the dust A suction means for sucking dust separated from the dust separator from the dust separator into the dust container, the dust separator having air containing dust introduced from a suction port; A vacuum cleaner provided with a swirling air circulation airflow that flows as a swirling airflow, provided with a dust removal filter that forms at least a part of the swirling air circulation airflow passage, and provided with a space where the suction force of the electric blower acts on the outer periphery of the dust removal filter Machine. 2. The electric vacuum cleaner according to claim 1, wherein a dust mixture preventing means is provided in an air passage connecting the dust container and the suction means. The vacuum cleaner according to claim 1 or 2, wherein the dust filter is provided over the entire circumference of the swirling air circulation air passage. The vacuum cleaner as described in any one of Claims 1-3 which provided the said dust accommodating part below the said dust removal filter. The vacuum cleaner according to any one of claims 1 to 4, wherein the swirling air circulation air passage has a substantially cylindrical shape, and the suction port is configured in a tangential direction of the substantially cylindrical air of the swirling air circulation air passage. The main air path in which the suction force of the electric blower acts on the outer periphery of the dust filter is configured in the space provided on the outer periphery of the dust filter. Electric vacuum cleaner.