JP4333813B2 - Electric vacuum cleaner - Google Patents

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 dedicated cyclone air flow is generated in the dust collecting case, dust is separated from the sucked air flow by centrifugal force, 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 cyclone 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 cyclone air flow, the intake path needs to be bent greatly, and a swirling flow is also generated at the time of intake, so the pressure loss in the path from the intake to the 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 conventional problem, an electric vacuum cleaner of the present invention includes an electric blower that generates a suction force ,
The electric blower has a suction port for sucking air containing dust and sucks from the suction port.
Dust separation comprising a case upper part that generates a swirling airflow in the air and a case central part that is disposed below the case upper part and has a hollow dust removal filter inside and a space in the outer peripheral direction of the dust removal filter And
A dust container that is disposed below the dust separator in communication with the dust separator, and that contains the dust separated by the dust separator;
After the air introduced from the suction port and turned into the swirling airflow at the upper part of the case descends the hollow portion of the dust removal filter and passes through the dust removal filter , the main air passage leading to the electric blower through the space ;
An electric vacuum cleaner comprising: the dust container and the space communicated with each other; and a sub-air passage extending from the suction port to the space through the hollow part of the dust filter and the dust container to the space. It is.

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

  Further, the 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 ensured. 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, the coarse dust that descends while turning around the hollow portion in the dust removal filter and is guided to the dust accommodating portion is sucked through the auxiliary air passage, so that it is more reliably captured and accumulated in the dust accommodating portion. Furthermore, it is possible to prevent reattachment to the dust removal filter due to dust winding during operation, and to provide a vacuum cleaner that suppresses a reduction in air volume and has excellent air volume maintenance performance.

  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.

  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.

The first invention is an electric blower that generates a suction force ;
The electric blower has a suction port for sucking air containing dust, and is disposed below the upper part of the case for generating a swirling airflow in the air sucked from the suction port, and has a hollow dust removal inside. A dust separation part comprising a case central part having a filter and a space in the outer circumferential direction of the dust removal filter ;
A dust container that is disposed below the dust separator in communication with the dust separator, and that contains the dust separated by the dust separator;
After the air introduced from the suction port and turned into the swirling airflow at the upper part of the case descends the hollow portion of the dust removal filter and passes through the dust removal filter , the main air passage leading to the electric blower through the space ;
An electric vacuum cleaner comprising: the dust container and the space communicated with each other; and a sub-air passage extending from the suction port to the space through the hollow part of the dust filter and the dust container to the space. It is.

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

  Further, the 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 ensured. 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, the coarse dust that descends while turning around the hollow portion in the dust removal filter and is guided to the dust accommodating portion is sucked through the auxiliary air passage, so that it is more reliably captured and accumulated in the dust accommodating portion. Furthermore, it is possible to prevent reattachment to the dust removal filter due to dust winding during operation, and to provide a vacuum cleaner that suppresses a reduction in air volume and has excellent air volume maintenance performance.

  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.

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.

2nd invention is the vacuum cleaner which provided the fine dust filter in the downstream of the dust removal filter especially in 1st invention.

Such invention, the upstream side of the dust filter cotton dust and hair, and dust removing coarse dust such as food debris can be dust fine dust such as sand at the downstream side of the fine dust filter. Accordingly, cotton dust or the like that is likely to cause air path resistance can be captured on the upstream side and swirled in the dust collecting case, and a reduction in suction force can be more effectively prevented.

The third invention is a vacuum cleaner in which a coarse dust filter is provided in the auxiliary air passage particularly in the first invention or the second invention.

By such an invention, the coarse dust that descends while swirling the hollow portion in the dust removal filter and is guided to the dust container is sucked in the direction of the coarse filter through the auxiliary air passage and filtered, so that It is reliably captured and deposited in the dust container. Also, fine dust that has passed through the coarse dust filter is also taken leached with fine dust filter, are removed in the middle of the air passage leading to the electric blower side.

Thus, crude dust and fine dust is more reliably separated, Sochiri is reliably captured by the dusts receptacle deposition, also ensuring the air volume maintenance performance, and long-term maintenance-free vacuum cleaner be able to.

A fourth invention is particularly secondary air passage that put the second invention or the third invention is an electric vacuum cleaner in communication with the upstream side of the fine dust filter from the dust receiving portion.

By such an invention, coarse dust such as cotton dust and hair descends while swirling through the hollow portion in the dust removal filter, is guided to the dust container, and the coarse dust guided to the dust container is Is sucked in the direction of the coarse dust filter and filtered out, so that it is more reliably captured and deposited in the dust container. When the coarse dust introduced into the dust container is sucked through the coarse filter toward the end of the fine filter, coarse dust such as cotton dust and hair is not allowed to pass through the coarse filter. Are separated. Accordingly, coarse dust such as cotton dust and hair, which has a particularly large air path resistance, can be reliably captured in the dust container, and a reduction in the air volume can be prevented more effectively. Also, fine dust that has passed through the coarse dust filter flows from the fine dust filter lower end, taken leached with fine dust filter, are removed as the air passage leading to the electric blower side.

Thus, crude dust and fine dust are more efficiently separated, Sochiri is deposited is securely caught by the dust dirt receptacle. Therefore, it is possible to further secure the air volume maintenance performance and to make a long-term maintenance-free electric vacuum cleaner.

  The configuration of the electric vacuum cleaner of the present invention will be described more specifically. A suction tool that sucks dust on a surface to be cleaned such as a floor surface, an electric blower that sucks air containing dust from the suction tool, and this electric motor Vacuum cleaner main body with built-in blower, dust separation part that introduces air containing dust sucked by the electric blower and separates it into dust and air, and dust container part that contains the dust separated by this dust separation part Is provided. The dust separation unit includes a suction port for introducing air containing dust from the suction tool, a swirling air circulation air passage for flowing air containing dust introduced from the suction port as a swirling air current, and at least of the swirling air circulation air passage It has a dust removal filter that forms a part and separates dust and air, covers the outer periphery of this dust removal filter, and the main air passage connected to the suction side of the electric blower from the outer periphery side of the dust removal filter. It is set as the structure which made the suction force act.

  In order to generate a swirling airflow, a swirling air circulation air passage is formed in a substantially cylindrical shape, preferably a cylindrical shape, and an airflow swirling along the circumferential direction is generated on the inner wall surface of the swirling air circulation air passage. A suction port is formed as follows. That is, the suction direction of the suction port is a cylindrical tangential direction in a direction orthogonal to the cylindrical axial direction so as to flow along the circumferential direction of the inner wall surface. The substantially cylindrical shape includes a polygonal shape such as an elliptical shape and an octagonal cross-sectional shape in a plane orthogonal to the axial direction, and in summary, swirling along the circumferential direction of the inner wall surface of the swirling air circulation passage Any shape that generates an airflow may be used.

In order to generate a swirling airflow in the swirling air circulation air passage, it is natural that the suction force of the electric blower acts in the swirling air circulation air passage to generate a negative pressure state. Therefore, the one end side provided with the suction port of the substantially cylindrical swirling air circulation air passage is covered with the top of the dust collecting case, and the other end side is airtightly connected to the dust container, and at least the swirling air circulation air passage is formed. The suction force of the electric blower may be applied from the dust filter portion.

  In order to obtain a more preferable form, it is preferable to connect a sub-air passage in which the suction force of the electric blower acts on a connection portion between the swirling air circulation air passage and the dust housing portion or the dust housing portion itself. With this configuration, not only the suction force of the dust removal filter portion but also the suction force at a location closer to the dust storage portion can be obtained, and the dust that has passed through the dust removal filter is more easily moved to the dust storage portion.

  One end of the auxiliary air passage is connected to a part of the dust container, and the other end is connected to the suction side of the electric blower, or the other end is connected to a part of the main air passage already formed. Similar effects can be obtained. It is preferable that a third dust removal filter is attached to one end side of the auxiliary air passage so that the dust accumulated in the dust container does not flow into the electric blower side. In particular, in order for the suction force of the electric blower to act on the dust container side through the auxiliary air passage, it is preferable to adopt a configuration in which the third dust removal filter is not easily clogged.

  Therefore, the third dust removing filter is a filter for collecting coarse dust, so that it is less likely to be clogged and can withstand long-term use. On the other hand, since it is possible that fine dust flows into the auxiliary air passage by using the coarse dust filter, the durability of the electric blower decreases when it directly enters the suction side of the electric blower. Therefore, when the third dust removal filter is a coarse dust filter, it is necessary to provide the fine dust filter upstream from the suction side of the electric blower.

  As for this fine dust filter, if the dust filter located in the main air passage is used as the fine dust filter, the upstream side of the fine dust filter constituting the dust filter can be used as a method of connecting the sub air passage to the main air passage. A secondary air passage is connected to the main air passage located in With this connection, fine dust can be collected from the auxiliary air passage by the fine dust filter constituting the dust removal filter. In addition, this connection method can eliminate the fine dust filter dedicated to the auxiliary air passage, and improve the maintainability of the fine dust filter.

  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.

  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 29a that is a first air passage in which the suction port 6 of the dust collecting case 5 and the electric blower 21 communicate with each other. is doing.

  The main air passage 29a from the suction port 6 to the electric blower 21 is provided from the first dust filter 27a to the entire outer periphery of the second dust filter 27b.

  Next, the details of the dust collection case 5 and the cylindrical dust removal filter 27 will be described with reference to FIG.

  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 depositing the sucked dust is provided at the lower part of the dust collecting case 5, and the bottom surface of the dust collecting case 5 on the dust container 24 side is an open / close lid 31. The opening / closing lid 31 is opened via 32 and the dust in the dust container 24 can be discharged.

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 was used to minimize the fine protrusions on the inner surface of the first dust filter 27a.

  On the other hand, as the second dust filter 27b, a non-woven fabric, pulp, glass fiber, HEPA filter or the like can be used, but a non-woven fabric member that can efficiently remove relatively fine particles is pleated and folded into a shape member. By connecting and installing 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 porous member of PTFE with good dust separation is used on the dust adhering surface because clogging of the second dust filter 27b 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.

  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.

  From the above, the coarse dust 52 such as cotton dust is swirled and lowered by the swirling airflow and guided to the dust container 24, and the fine dust 51 such as sand dust passes through the mesh hole of the first dust removing filter 27a. Therefore, the first dust removal 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 first embodiment, the second dust filter 27b is provided on the entire circumference of the first dust filter 27a. However, as shown in the perspective view of FIG. 7 and the sectional view of FIG. Even if the second dust filter 27b is disposed only on the suction side of the electric blower, the same effect can be recognized.

  Further, as shown in the broken line part of FIG. 9A and FIG. 9B, a notch is formed in the cylindrical dust removal filter 27, and a transparent arc-shaped fluoroscopic member is fitted into the notch part, and a viewing window 91 is provided. By providing this, it is possible to visually check the vertical cross-section of the dust accumulated in the dust collecting case 5, and it is easier to find when something other than dust is accidentally sucked during the cleaning operation.

(Embodiment 2)
Next, a second embodiment of the present invention will be described. In the following, differences from the configuration and operation of the first embodiment will be mainly described, and the same elements as those in the first embodiment will be denoted by the same reference numerals and description of the configuration and operation will be omitted.

  10 and 11 are sectional views of the electric vacuum cleaner and the dust collecting case 5 in the second embodiment.

  As shown in FIGS. 10 and 11, the difference from the first embodiment is that the dust collection case 5 is arranged below the cylindrical dust filter 27 in addition to the cylindrical dust filter 27. That is, a hollow disc-shaped third dust filter 28 is provided.

  The third dust removal filter 28 is a coarse dust filter, and is made of a metal mesh having a vent hole diameter of 250 microns, like the first dust removal filter 21, and has an inner end that is a peripheral end of the first dust removal filter 27a. The outer end is disposed in contact with the seal portion 43 and the dust container 24 of the dust collecting case 5 without any gap so as to cover the outer peripheral seal portion 43 on the lower end side of the second dust filter 27b. Has been. Then, the air from the suction port 6 flows to the lower end portion of the second dust removing filter 27b through the third dust removing filter 28 through the cylindrical hollow portion of the first dust removing filter 27a and the dust accommodating portion 24. The third dust filter 28 is provided in the middle of the sub air passage 29b that is the second air passage.

  Thus, the first dust filter 27a, the second dust filter 27b, and the third dust filter 28 are the main air passage 29a or the sub air passage where the suction port 6 of the dust collecting case 5 and the electric blower 21 communicate with each other. 29b.

  About the vacuum cleaner comprised as mentioned above, the operation | movement is demonstrated based on FIG.

  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 collection 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.

  Again, 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 removal filter 27a on the upstream side of the cylindrical dust removal 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 further, the airflow swirls. As shown in FIG. 12 (b), the first dust removing filter 27 a and the second dust removing filter 27 b are sequentially passed through and 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 swirling with the flow of the air current, and the fine dust 51 such as sand dust among the dust is the first dust removing filter 27a. And is filtered by the outer second dust removing filter 27b.

  In addition, the coarse dust 52 such as cotton dust having a low specific gravity and easy to receive 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. 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 in the direction of the fold recess 42 at the end of the second dust filter 27b through the third dust filter 28 disposed at the top of the dust container 24. As a result, the dust container 24 is surely captured and deposited, and a compressive action is exerted on the coarse dust 52 to reduce the volume.

  At this time, in the first dust removing filter 27a, the coarse dust 52 such as cotton dust is swirled and lowered due to the swirling airflow, and the fine dust 51 such as sand dust is passed through the mesh hole of the first dust removing filter 27a. Because it passes through, dust does not accumulate and air permeability is secured.

  The third dust removal filter 28 is made of a metal mesh, the inner end is in contact with the circumferential end of the first dust removal filter without a gap, and the outer end is provided on the outer periphery on the lower end side of the second dust removal filter 27b. The fine dust 51 mixed with the coarse dust 52 in the dust container 24 passes through the third dust filter 28 and then passes through the second dust filter 27b. Filtered off.

In other words, when dust is sucked, the dust is surely separated into fine dust 51 and coarse dust 52, the fine dust 51 is filtered by the second dust removing filter 27b, and the coarse dust 52 is reliably captured by the dust container 24. Since the suction path from the suction port 6 to the electric blower 21 is secured around the first and second dust removing filters, a reduction in the air volume can be prevented.

  In the second embodiment, the same air volume maintenance performance evaluation test as in the first embodiment was performed.

  As a result, as shown in FIG. 13, it is understood that the second embodiment is superior in the air volume maintenance performance to the first embodiment.

  As described above, in addition to the first embodiment, by arranging the third dust removal filter 28 in the dust collecting case 5, coarse dust is reliably captured and accumulated in the dust container 24, and thus the air flow rate is further reduced. Can be made into a useful vacuum cleaner.

In the second embodiment, the second dust filter 27b and third dust filter 28, is provided on the entire circumference of the first dust filter 27a, as in the first embodiment, instead of the entire periphery In both cases, the same effect is recognized even when the second dust filter 27b and the third dust filter 28 are disposed only on the suction side of the electric blower (not shown).

(Embodiment 3)
Next, a third embodiment of the present invention will be described. In the following, differences from the configurations and operations of the first and second embodiments will be mainly described, and the same components are denoted by the same reference numerals, and description of the configurations and operations will be omitted.

  FIG. 14 is a cross-sectional view of a main part when a part of the cylindrical dust removal filter 27 is viewed from above. Others are the same as in the second embodiment.

  As shown in FIG. 14, a drive gear 141 is provided in the seal portion 43 on the upper outer periphery of the second dust filter 27 b constituting the cylindrical dust filter 27, and another drive gear 141 is fitted. The second dust removal filter 27b and the first dust removal filter 27a rotate together by the drive gear 142 and the rotation motor 143 that rotates the drive gear 142.

  The first dust filter 27a and the second dust filter 27b may both be configured to rotate, or only the second dust filter 27b may be configured to rotate, or the first dust filter 27b may be configured to rotate. One dust removal filter 27a may be provided with the drive gear 141, and the first dust removal filter 27a may be rotated by the drive gear 142 and the rotary motor 143 as described above.

  When the first dust filter 27a and the second dust filter 27b are rotated by driving the rotary motor 143, the amount of dust adhering to the first dust filter 27a and the second dust filter 27b is shifted depending on the location of the first dust filter 27a and the second dust filter 27b. It is possible to prevent a non-constant state, that is, a state where a large amount of dust adheres to the vicinity of the partition wall 26 where the suction force of the electric blower 2 is strong. Further, it is possible to equalize the amount of dust adhering to the first dust removing filter 27a and the second dust removing filter 27b, and to further prevent a decrease in air volume due to clogging of the filter.

  The evaluation test of the air volume maintenance performance was performed using the electric vacuum cleaner of the third embodiment. Similarly, 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 shown in FIG. 15, it can be seen that the third embodiment is superior to the second embodiment in air volume maintenance performance.

  As described above, the vacuum cleaner of the third embodiment ensures a high suction work rate, the suction air volume is not easily lowered even when dust is sucked, and the amount of dust adhering to the dust filter is leveled. A vacuum cleaner that does not require maintenance for a long time can be provided.

(Embodiment 4)
Next, a fourth embodiment of the present invention will be described. In the following, differences from the configurations and operations of the first to third embodiments will be mainly described, and the same components are denoted by the same reference numerals, and description of the configurations and operations will be omitted.

  16 and 17 show a dust collection case 5 of the electric vacuum cleaner according to the fourth embodiment and a cross-sectional view of main parts thereof. In FIG. 16, the first dust removing means 161 is fixed at at least one place on the upper or lower portion of the dust collecting case 5.

  Here, the first dust removing means 161 has a spatula shape with both ends sharpened as shown in FIG. 17, and is pressed against and contacted with the inner periphery of the first dust removing filter 27a.

  At this time, as described in the third embodiment, the drive gear 141 on the second dust filter 27b is rotated by the rotation motor 143 and the drive gear 142, and the second dust filter 27b and the first dust filter 27a are rotated. Are rotated together, the first dust removing means 161 slides while pressing the inner surface of the first dust removing filter 27a. Therefore, the inner surface of the first dust removing filter 27a can be cleaned to remove dust such as cotton dust and lint stuck to the inner surface of the first dust removing filter 27a, and the first dust removing filter 27a. Therefore, it is possible to prevent a decrease in the air volume, and to eliminate the trouble of removing and cleaning the first dust filter 27a, thereby providing a cleaner that does not require maintenance for a long time.

  Further, in the fourth embodiment, the first dust filter 27a is set to rotate in one revolution of 5 seconds, and a power switch of the motor 143 for 5 seconds immediately after the electric blower 21 is stopped by a control means (not shown). And the second dust filter 27b and the first dust filter 27a are both rotated together.

  Here, only one first dust removing means 161 is provided, but if there are a plurality of the first dust removing means 161, there is still an effect.

  In addition, here, the shape of the first dust removing means 161 is a spatula shape, but if the shape is changed to a brush shape or a raised shape depending on the type of deposit, an effect peculiar to the shape can be obtained.

  Further, here, as shown in FIG. 16 (a), a rod-like object is attached vertically to the upper portion of the dust collecting case 5 as the first dust removing means 161. However, as shown in FIG. If the first dust removing filter 27a is rotated in a spiral shape while pressing the inner periphery of the dust removing filter 27a, the shear effect is increased when the first dust removing filter 27a is rotated, and tangled hair, lint, etc. It is possible to clean while cutting, further improving the effect.

(Embodiment 5)
Next, a fifth embodiment of the present invention will be described. In the following, differences from the configurations and operations of the first to fourth embodiments will be mainly described, and the same components are denoted by the same reference numerals, and description of the configurations and operations will be omitted.

  FIG. 19 shows a cross-sectional view of the electric vacuum cleaner according to the fifth embodiment.

  FIG. 19A is a longitudinal sectional view of the dust collecting case 5 of the electric vacuum cleaner according to the fifth embodiment. In FIG. 19A, the second dust removing means 191 is provided outside the second dust removing filter 27b. Further, as shown in an enlarged view of the main part in FIG. 20, the second dust removing means 191 is provided with a hitting portion 201 which is a spring made by bending a metal foil.

  The drive gear 141 is connected to the second dust filter 27b, and the first dust filter 27a is attached so as to be linked to the second dust filter 27b. The drive gear 141 is driven by the rotary motor 143 and the drive gear 142. By rotating, the first dust filter 27a and the second dust filter 27b are rotated in conjunction with each other.

  As shown in FIG. 19B and FIG. 20, when the first dust removing filter 27a and the second dust removing filter 27b rotate, the hitting portion 201 provided in the second dust removing means 191 becomes the second dust removing filter. The filter 2b is hit from the outside, and the fine dust 51 deposited and deposited inside the substantially U-shaped fold-shaped filter 41 of the second dust removal filter 27b is dropped. 2 dust filter 27b can be cleaned. Further, the entire circumference of the second dust removing filter 27b can be cleaned by maintaining the rotation.

  Also, here, the second dust filter 27b is set so as to rotate in one round 5 seconds, and the power switch of the motor 143 is turned on for 5 seconds immediately after the electric blower 21 is stopped by the control means (not shown). The two dust removing filters 27b and the first dust removing filter 27a are interlocked to rotate both.

  Therefore, after the electric blower 21 stops, the second dust removal filter 27b can be cleaned for 5 seconds, and the dust attached to the entire periphery of the second dust removal filter 27b can be dropped.

  In the fifth embodiment, the same air volume maintenance performance evaluation test as that in the first embodiment was performed. As shown in FIG. 21, the results show that the fifth embodiment is superior in air volume maintenance performance to the second embodiment.

  In this way, by rotating the first dust removing filter 27a and the second dust removing filter 27b, the dust attached to the second dust collecting filter 27b is removed and cleaned by using the second dust removing means 191. For this reason, it is possible to further prevent a reduction in the air volume, and to eliminate the trouble of removing and cleaning the second dust removing filter 27b, thereby making it possible to provide a vacuum cleaner that does not require maintenance for a long time.

  Here, as the second dust removing means, the hitting portion 201 is formed by bending a metal foil into a spring, but a plate-shaped member or an elastic body such as rubber may be used.

(Embodiment 6)
Next, a sixth embodiment of the present invention will be described. In the following, differences from the configurations and operations of the first to fifth embodiments will be mainly described, and the same components are denoted by the same reference numerals, and description of the configurations and operations will be omitted.

  In FIG. 22, the perspective view of the dust collection case 5 of the vacuum cleaner in Embodiment 6 of this invention is shown.

  In FIG. 22, the third dust removing means 221 is fixed to the case upper portion 22a of the dust collecting case 5, and the case upper portion 22a is configured to rotate while maintaining airtightness with the case central portion 22b.

  Here, as shown in FIG. 23, the third dust removing means 221 has a spatula shape with both ends sharpened, and is pressed against and in contact with the inner periphery of the first dust removing filter 27a.

  When the case upper portion 22a is rotated at this time, the third dust removing means 221 slides while pressing the inner surface of the first dust removing filter 27a. Therefore, the inner surface of the first dust removing filter 27a is cleaned and the first dust removing filter is removed. It is possible to remove dust such as tangled cotton dust and lint that adheres to the inner surface of the 27a, ensures the air permeability of the first dust removing filter 27a, prevents a decrease in the air volume, and removes the first dust removing filter 27a for cleaning. Therefore, it is possible to provide a vacuum cleaner that does not require maintenance for a long time.

  In addition, although the one 3rd dust removal means 221 was shown here, it will still be effective if it makes more than one.

  Here, the shape of the third dust removing means 221 is a spatula shape, but if the shape is changed to a brush shape or a raised shape depending on the type of deposit, an effect specific to the shape can be obtained.

  Furthermore, although the third dust removing means 221 is attached in the vertical direction here, if the third dust removing means 221 is attached in a spiral shape with an angle as shown in FIG. 24, the third dust removing means 221 is rotated. The shearing effect increases, and the hair can be cleaned while cutting tangled hair or lint, and the effect is further improved.

  In addition, as a means to rotate the 3rd dust removal means 221 fixed to this case upper part 22a, the method of rotating manually in arbitrary directions which can simplify a structure may be sufficient, for example, or the rotational drive which is not illustrated The third dust removing unit 221 may be rotated in conjunction with the operation or stop timing of the electric blower 21.

(Embodiment 7)
Next, a seventh embodiment of the present invention will be described. In the following, the differences from the configurations and operations of the first to sixth embodiments will be mainly described, and the same elements will be denoted by the same reference numerals, and description of the configurations and operations will be omitted.

  FIG. 25 is a perspective view of the dust collecting case 5 of the vacuum cleaner according to Embodiment 7 of the present invention, and FIG. 26 is a cross-sectional view of the main part of the fourth dust removing means (cylindrical basket 251) of the vacuum cleaner. .

  In FIG. 25, a cylindrical basket 251 serving as a fourth dust removing means is provided in the space 33 outside the second dust filter 27b. In the seventh embodiment, as shown in FIG. 25, the cylindrical cage 251 is configured by connecting the upper and lower circumferential rotating gears 252 with a plurality of connecting portions 253 and attaching a striking portion 254 to the connecting portions 253. ing. As shown in FIG. 26, the striking portion 254 is a spring formed by bending a metal foil, and is attached to the connecting portion 253.

  Then, by rotating the circumferential rotating gear 252 with the driving gear 256 provided in the motor 255, the cylindrical cage 251 is rotated, and the outer periphery of the second dust removing filter 27b is vibrated or hit by the hitting portion 254. It is something to add.

If the cylindrical cage 251 that is the fourth dust removing means rotates, the striking part 254 vibrates or applies an impact to the outer periphery of the second dust removing filter 27b, and particularly inside the folds of the second dust removing filter 27b, The fine dust 51 adhering and accumulating in the hollow portion 42 is dropped, and the second dust removing filter 27b can be cleaned. In addition, by maintaining the rotation, the second
The entire circumference of the dust removal filter 27b can be cleaned.

  Also, here, the cylindrical cage 251 is set to rotate in one round 5 seconds, and the power switch of the motor 255 is turned on for 5 seconds immediately after the electric blower 21 is stopped by the control means (not shown), and the fourth dust removal It is assumed that the rotating basket 251 serving as means rotates once, and the entire circumference of the second dust removing filter 27b is cleaned.

  In the seventh embodiment, an air volume maintenance performance evaluation test was performed as in the other embodiments.

  As shown in FIG. 27, the result shows that the seventh embodiment is superior to the second embodiment in the air volume maintenance performance.

  In this way, by rotating the cylindrical cage 251 as the fourth dust removing means, the dust attached to the second dust collecting filter 27b is removed and cleaned, so that it is possible to prevent a further decrease in the air volume. It is possible to provide a vacuum cleaner that does not require maintenance for a long period of time without the need to remove and clean the second dust filter 27b.

  In this case, the hitting portion 254 is made of a metal foil bent as a spring, but it may be a plate or an elastic body such as rubber.

  Here, only the cylindrical cage 251 which is the fourth dust removing means is rotated using the control means (not shown). Similarly, the third means of the sixth embodiment is used using this control means. The dust removing means 221 may be rotated, or these may be rotated at the same time or at different times.

(Embodiment 8)
Next, an eighth embodiment of the present invention will be described. In the following, the differences from the configurations and operations of the first to seventh embodiments will be mainly described, and the same components will be denoted by the same reference numerals, and description of the configurations and operations will be omitted.

  FIG. 28 is a perspective view of the dust collecting case 5 of the electric vacuum cleaner according to the eighth embodiment of the present invention. FIG. 29A is a side sectional view of the dust collected from the side, and FIG. Fig. 2 shows a side sectional view in a state where the opening / closing lid 31 is opened.

  As shown in FIG. 28, in the eighth embodiment, the third dust removal filter 28 has a substantially truncated cone shape that is open up and down, and the upper diameter of the truncated cone matches the lower end diameter of the first dust collection filter 27a. Are in contact. Further, the lower diameter of the truncated cone is made smaller than the inner diameter of the bottom of the dust container 24, and the lower part of the truncated cone is brought into contact with the bottom of the dust container 24 without a gap. The rest is the same as in the first embodiment of the present invention. At this time, the third dust filter 28 is a coarse dust filter made of a metal mesh having a vent hole diameter of 250 microns, as in the first embodiment.

  Even if the third dust removal filter 28 has a substantially truncated cone shape with the top and bottom open, the air flow is the same as in the first embodiment, the fine dust 51 is filtered by the second dust removal filter, and the coarse dust 52 is stored in the dust. It is captured and deposited by the part 24.

Here, the fine dust 51 peeled off from the second dust removing filter using the fourth dust removing means shown in the seventh embodiment or the like is removed from the third dust removing filter 28 as shown in FIG. It is surely dropped to the bottom surface of the dust container 24 through the slope formed by the outer cone bus. For this reason, the distance between the fine dust 51 that has fallen and the second dust removal filter 27b can be increased, the suction action on the fine dust 51 that has fallen is reduced, and the fine dust 51 is reapplied to the second dust removal filter 27b. Adhesion can be prevented, and a reduction in air volume due to filter clogging can be prevented.

  Furthermore, since the third dust removal filter 28 has a truncated cone shape as described above, even if the coarse dust 52 is clogged inside the third dust removal filter 28, the lower space is wider than the upper space. Further, pressure contact with the third dust removing filter 28 due to the spread of the coarse dust 52 or the like hardly occurs. In addition, as shown in FIG. 29 (b), if the opening / closing lid 31 is opened via a hinge 32 provided on the bottom surface of the dust container 24, the dust is easily removed from the third dust filter 28 by the action of gravity. Therefore, dust can be discharged without being caught, and a vacuum cleaner with excellent dust disposal performance can be obtained.

(Embodiment 9)
Next, a ninth embodiment of the present invention will be described. In the following, differences from the configurations and operations of the first to eighth embodiments will be mainly described, and the same components are denoted by the same reference numerals, and description of the configurations and operations will be omitted.

  FIG. 30 is a perspective view of the dust collecting case 5 of the electric vacuum cleaner according to Embodiment 9 of the present invention. FIG. 31A is a side cross-sectional view of the state where dust is accumulated, and FIG. 31B. Fig. 2 shows a side sectional view in a state where the opening / closing lid 31 is opened.

  As shown in FIG. 30, in the ninth embodiment, the shape of the first dust removing filter 27a is a truncated cone shape in which the lower diameter is larger than the upper diameter.

  By making the shape of the first dust removal filter 27a into the truncated cone shape as described above, as shown in FIG. 31 (a), dust larger than the amount of dust that can be accommodated in the dust accommodating portion 24 is sucked, and Even if the coarse dust 52 is clogged in the single dust removal filter 27a, the lower space is wider than the upper space, and therefore the pressure contact with the first dust removal filter 27a due to the spread of the coarse dust 52 or the like hardly occurs. Further, as shown in FIG. 31 (b), if the opening / closing lid 31 is opened via a hinge 32 provided on the bottom surface of the dust container 24, dust is easily removed from the first dust filter 27a by the action of gravity. Therefore, dust can be discharged without being caught, and a vacuum cleaner with excellent dust disposal performance can be obtained.

(Embodiment 10)
Next, an embodiment 10 of the invention will be described. In the following, differences from the configurations and operations of the first to ninth embodiments will be mainly described, and the same components are denoted by the same reference numerals, and description of the configurations and operations will be omitted.

  32 and 33 show the configuration of the tenth embodiment. An opening 321 is provided in a part of the third dust filter 28. Further, a dust chamber 322 for storing the dust removed by the second dust removing means 191 is provided below the opening 321. The dust chamber 322 is formed by being partitioned in the dust container 24, and the dust removed by the second dust removing means 191 is stored in the partitioned dust chamber 322.

  Further, as shown in FIGS. 32 and 33, the dust removed by the second dust removing means 191 is surely stored in the dust chamber 322 through the opening 321 as shown in FIGS. An opening portion 321 and a dust chamber 322 communicated with the opening portion 321 are disposed in the space. Further, by matching the shapes of the entrances of the opening 321 and the dust chamber 322, the dust that has fallen into the opening 321 can be reliably accommodated in the dust chamber 322.

  Further, by providing the dust chamber 322 in the dust container 24, when the dust stored in the dust container 24 is thrown into the trash box, the dust in the dust chamber 322 can be discarded at the same time.

  Further, a ventilation port 323 is provided in the dust chamber 322, and a fourth dust removal filter 324 that closes the ventilation port 323 is provided. Similar to the third dust filter 28, the fourth dust filter 324 is a metal dust coarse filter having a vent hole diameter of 250 microns.

  Further, the fourth dust removal filter 324 is arranged in the suction air passage in the same manner as in the third dust removal filter 28, and the air from the suction port 6 is exchanged with the cylindrical hollow portion of the first dust removal filter 27a and the dust. It is provided in the middle of the auxiliary air passage 29b that is the second air passage that flows to the lower end portion of the second dust removing filter 27b through the housing portion 24 and the air outlet 323 of the dust chamber.

  Next, the operation of the tenth embodiment will be described.

  The fine dust 51 removed by the second dust removing means 191 is stored in the dust chamber 322 by dropping into the opening 321 provided in the third dust removing filter 28. By providing the dust chamber 322 for storing the fine dust 51 in the dust accommodating portion 24, the amount of dust rewinding during cleaning can be further reduced, and the main air passage 29a and the second air passage which are the first air passages can be reduced. It is possible to prevent a decrease in the amount of air passing through the auxiliary air passage 29b which is the air passage.

  Further, by providing the ventilation port 323 in the dust chamber and disposing the fourth dust filter 324 made of metal mesh in the ventilation port 323, the auxiliary air passage 29b that is the second air passage can be secured. Therefore, as described in the second embodiment, when dust is sucked, the coarse dust 51 is captured by the dust container 24, so that an air path is secured around the first dust filter 27a and the second dust filter 27b. , Can prevent the air volume drop.

  Further, the removed fine dust 51 is stored separately from the coarse dust 52 in the partitioned dust chamber 322, thereby preventing the fine dust 51 from being reattached to the second dust filter 27b due to the fine dust 51 being rolled up during cleaning. Therefore, it is possible to more effectively prevent a decrease in the amount of air passing through the main air passage 29a as the first air passage and the sub air passage 29b as the second air passage.

  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) A sectional view (b) AA sectional view (d) (b) BB sectional view 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 vacuum cleaner (b) BB sectional view of (a) (A) Front sectional view of another type of dust collecting case of the vacuum cleaner (b) BB sectional view of (a) Sectional drawing which shows the structure of the main part of the main body of the vacuum cleaner in Embodiment 2 of this invention. (A) Front sectional view of the dust collecting case of the electric vacuum cleaner (b) Side sectional view of the dust collecting case (c) A sectional view (b) AA sectional view (d) (b) BB sectional view (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 The graph which shows the relationship between the domestic dust collection amount and suction | inhalation airflow change in the same vacuum cleaner and Embodiment 1 Sectional drawing which shows the principal part which shows the structure of the drive gear of the vacuum cleaner in Embodiment 3 of this invention. The graph which shows the relationship between the domestic dust collection amount and suction | inhalation airflow change in the vacuum cleaner and Embodiment 2 (A) Side sectional view of the dust collecting case in Embodiment 4 of the present invention (b) BB sectional view of (a) Sectional drawing which shows the principal part which shows operation | movement of the 1st dust removal means of the vacuum cleaner The perspective view of the dust collection case provided with the 1st dust removal means of another form of the same vacuum cleaner (A) Side sectional view of the dust collecting case in Embodiment 5 of the present invention (b) BB sectional view of (a) Sectional drawing which shows the principal part which shows operation | movement of the 2nd dust removal means of the vacuum cleaner The graph which shows the relationship between the domestic dust collection amount and suction | inhalation airflow change in the vacuum cleaner and Embodiment 2 The perspective view of the dust collection case of the vacuum cleaner in Embodiment 6 of this invention Sectional drawing which shows the principal part which shows operation | movement of the 3rd dust removal means of the vacuum cleaner The perspective view of the dust collection case provided with the 3rd dust removal means of another form of the same vacuum cleaner The perspective view of the dust collection case of the vacuum cleaner in Embodiment 7 of this invention Sectional drawing which shows the principal part which shows the operation | movement of the 4th dust removal means of the vacuum cleaner The graph which shows the relationship between the domestic dust collection amount and suction | inhalation airflow change in the vacuum cleaner and Embodiment 2 The perspective view of the dust collection case of the vacuum cleaner in Embodiment 8 of this invention (A) Side sectional view showing a state where dust is collected in the dust collecting case of the electric vacuum cleaner (b) Side sectional view showing a state where the opening / closing lid of the dust collecting case is opened and dust is discharged. The perspective view of the dust collection case of the vacuum cleaner in Embodiment 9 of this invention (A) Side sectional view showing a state where dust is collected in the dust collecting case of the electric vacuum cleaner (b) Side sectional view showing a state where the opening / closing lid of the dust collecting case is opened and dust is discharged. (A) Side sectional view of the dust collecting case in Embodiment 10 of the present invention (b) BB sectional view of (a) Perspective view of the vacuum cleaner dust collection case

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vacuum cleaner main body 5 Dust collection case 6 Suction port 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 3rd dust removal filter 29a 1st wind Road (main wind path)
29b Second air passage (sub air passage)
31 Opening / closing lid 33 Space part 41 Pleated filter 42 Indentation part 43 Sealing part 51 Fine dust 52 Coarse dust 161 First dust removing means 191 Second dust removing means 221 Third dust removing means 251 Cylindrical cage (fourth Dust removal means)
324 Fourth dust filter

Claims (4)

An electric blower that generates a suction force ;
The electric blower has a suction port for sucking air containing dust, and is disposed below the upper part of the case for generating a swirling airflow in the air sucked from the suction port, and has a hollow dust removal inside. A dust separation part comprising a case central part having a filter and a space in the outer circumferential direction of the dust removal filter ;
A dust container that is disposed in communication with the dust separator below the dust separator, and that stores the dust separated by the dust separator;
After the air introduced from the suction port and turned into the swirling airflow at the upper part of the case descends the hollow portion of the dust removal filter and passes through the dust removal filter , the main air passage leading to the electric blower through the space ;
An electric vacuum cleaner comprising: the dust container and the space communicated with each other; and a sub-air passage extending from the suction port to the space through the hollow part of the dust filter and the dust container to the space. . The electric vacuum cleaner according to claim 1 , wherein a fine dust filter is provided downstream of the dust removal filter. The electric vacuum cleaner according to claim 1 or 2 , wherein a coarse dust filter is provided in the auxiliary air passage . The vacuum cleaner according to claim 2 or 3 , wherein the auxiliary air passage communicates with the upstream side of the fine dust filter from the dust container.

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