KR100934726B1 - Vacuum cleaner - Google Patents

Abstract

Provided is an electric vacuum cleaner which ensures a high suction rate and does not easily lower suction power even when dust is sucked. For that purpose, the dust collecting case for introducing air containing dust sucked by the electric blower has a cylindrical shape, and has a suction port for introducing air containing dust from a tangential direction, and a dust container at the other end side of the suction port, The vibration damping filter in the case was disposed in the air passage in which the dust collecting case and the electric blower communicated. As a result, dust is continuously turned in the dust collecting case by the swirling airflow in the dust collecting case, and even when dust adheres to the dust removing filter, the dust is separated from the dust removing filter surface to ensure an intake passage at all times.

Description

Electric vacuum cleaner {VACUUM CLEANER}

The present invention relates to an electric vacuum cleaner using a dust collecting case which can be used repeatedly.

Conventionally, this type of vacuum cleaner is known to generate an exclusive cyclone airflow in the dust collecting case, separate dust from the sucked air flow by centrifugal force, and deposit dust in the dust collecting case (Japanese Patent Laid-Open No. 2000). -342492).

However, in the above-described conventional configuration, cyclone airflow is generated in the dust collecting case, and dust is separated by centrifugal force from the sucked air flow to deposit dust in the dust collecting case. However, most of them maintain a high suction rate. Due to the restriction, the dust cannot be sufficiently centrifuged. Therefore, when dust accumulates in the dust collecting case, since the accumulated dust itself acts as a filter, fine dust also adheres to the large dust deposits, and this has a problem that it becomes a ventilation resistance and the suction force drops rapidly. . In addition, in order to generate the cyclone airflow, it is necessary to bend the intake path largely, and at the same time, the swirl flow is also generated during inhalation, so that the pressure loss in the path from intake to exhaust in the dust collection case increases, resulting in a low intake rate. Had a challenge.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems, and provides an electric vacuum cleaner which ensures a high suction rate and does not easily lower the suction power even when suctioning dust.

In order to solve the conventional problems, the electric vacuum cleaner of the present invention includes an electric blower, a dust separator for introducing air containing dust sucked by the electric blower provided upstream of the electric blower, and the dust separator. A dust accommodating part for accommodating the dust separated from the dust collecting part; a dust air flow passage for providing air containing dust introduced from the suction port as a swirl air flow, and providing at least a portion of the swing air flow ventilation path; It is an electric vacuum cleaner provided with the damping filter to form, and provided with the space which the suction force of an electric blower acts on the outer periphery of a damping filter.

By this invention, when air containing dust flows into the dust separation unit, swirling airflow is generated in the dust separation unit. Here, the dust introduced with the turning component is also turned in the cylindrical hollow part in the vibration damping filter, and large dust such as a bundle of dust or hair is lowered while turning the cylindrical hollow part in the damping filter and guided to the dust container.

Moreover, in the cylindrical hollow part in a damping filter, since it peels even if dust adheres to the inner surface by turning airflow, dust does not accumulate in a damping filter, and air permeability can be ensured. That is, even when dust is sucked in, dust is accumulated in the dust container, and a suction path from the suction port to the electric blower is secured over the vibration suppression filter. Therefore, it is possible to provide an electric vacuum cleaner that does not cause a decrease in the amount of airflow and is excellent in the amount of airflow maintaining performance, and does not require management for a long period of time.

Further, in the vacuum cleaner of the present invention, in the air passage from the suction port to the electric blower, the dust is separated from the air passage without repeated bending, expansion or reduction of the airflow, so that a high suction rate can be ensured for a long time. .

Therefore, the vacuum cleaner of the present invention can provide a long-term management-free type vacuum cleaner which does not easily lower the suction power even when the dust is sucked while ensuring a high suction rate.

As described above, since the vacuum cleaner according to the present invention can provide a vacuum cleaner that ensures a high suction rate and at the same time does not lower the suction power even when the dust is sucked, it is possible to manage the filter or discharge dust. It can be greatly reduced, it is possible to use not only household electric cleaners, but also various kinds of vacuum cleaners for work.

The present invention provides an electric blower, a dust separation unit provided upstream of the electric blower and introducing air containing dust sucked by the electric blower, and a dust accommodation unit accommodating the dust separated by the dust separation unit. The dust separating part is provided with a swirling air flow passage for flowing air containing dust introduced from the suction port as the swirling air flow, and a vibration damping filter for forming at least a part of the swirling air flow passage. It is an electric vacuum cleaner provided with the space which the suction force of an electric blower acts on the outer periphery of this damping filter.

By this invention, when air containing dust flows into the dust separation unit, swirling airflow is generated in the dust separation unit. Here, the dust introduced with the turning component is also turned in the cylindrical hollow part in the vibration damping filter, and large dust such as a bundle of dust or hair is lowered while turning the cylindrical hollow part in the damping filter and guided to the dust container.

In addition, in the cylindrical hollow part in the damping filter, even if dust adheres to the inner surface by the swirling air flow, the dust does not accumulate in the damping filter, thereby ensuring breathability. That is, even when dust is sucked in, dust is accumulated in the dust container, and a suction path from the suction port to the electric blower is secured over the vibration suppression filter. Therefore, it is excellent in the air volume maintenance performance, without causing a fall of air volume, and it can be set as the vacuum cleaner which does not require management for a long time.

In the vacuum cleaner of the present invention, in the air path from the suction port to the electric blower, since the dust is separated from the air path without repeated bending, expansion, or reduction of the air flow, the high suction rate can be expanded for a long time. have.

Moreover, this invention is especially the vacuum cleaner which installed the damping filter over the perimeter of the turning airflow ventilation path.

By this invention, the suction path from the suction port to the electric blower is secured over the entire circumference of the vibration suppression filter, so that the air volume maintenance performance is excellent without causing further decrease in the air volume, and thus it becomes an electric cleaner that requires no management for a long time. Can be.

Moreover, this invention is especially the vacuum cleaner which installed the dust accommodating part below the dust removal filter.

By this invention, large dusts, such as a lump of dust and hair, descend | fall while turning the cylindrical hollow part in a damping filter, and can guide to a dust storage part more efficiently.

Moreover, this invention is especially the vacuum cleaner which made the swirl airflow ventilation path into the substantially cylindrical shape, and comprised the suction port in the substantially cylindrical tangential direction of this swing airflow ventilation path.

By this invention, since the air containing dust flows in from the tangential direction when it flows into the dust beak part, the turning airflow can be generated more powerfully in the dust separation part.

Moreover, this invention is an electric vacuum cleaner in which the main air path which the suction force of an electric blower acts on the outer periphery of this damping filter is comprised especially in the said space provided in the outer periphery of a damping filter.

 By this invention, the suction path from the suction port to the electric blower can be secured more effectively over the vibration suppression filter, and further, the air volume maintenance performance is excellent without causing a decrease in the air volume, and management is unnecessary for a long time. You can do it with an electric cleaner.

Moreover, this invention is an electric vacuum cleaner provided with the negative air path which the suction force of an electric blower acts especially in the dust accommodating part.

According to this invention, since the large dust which descend | falls while turning the cylindrical hollow part in a damping filter, and guide | induced to the dust accommodation part is attracted through the airflow path, it captures and deposits in the dust accommodation part more reliably. In addition, it is possible to prevent reattachment to the vibration suppression filter due to the dust reeling during the operation, thereby suppressing the decrease in the air volume, thereby providing a cleaner having excellent air volume maintenance performance.

Moreover, this invention is an electric vacuum cleaner which communicates with the exterior of this dust removal filter especially through a dust removal filter from a dust accommodating part.

According to this invention, the large dust lowered while turning the cylindrical hollow part in the vibration damping filter and guided to the dust container is attracted through the air duct and is filtered out by the vibration damping filter, so that it is more surely captured in the dust container. To be deposited. In addition, dust can be reliably picked up and accumulated in the dust accommodating portion to secure the air volume maintaining performance, thereby making it an electric cleaner that requires no management for a long time.

Moreover, this invention is especially the vacuum cleaner which installed the 3rd damping filter in the air blast furnace.

According to this invention, since the large dust lowered while turning the cylindrical hollow part in the vibration damping filter and guided to the dust container is attracted and filtered out in the direction of the third vibration damping filter through the air duct, the dust inside the dust container is more reliably. Captured and deposited at. In addition, the fine dust passing through the third vibration damping filter is also filtered out of the vibration damping filter and removed in the middle of the air path leading to the electric blower side.

Therefore, large dust and fine dust are separated more reliably, and large dust is reliably picked up and accumulated in the dust accommodating portion, and further, the air volume maintaining performance can be secured, thereby making it possible to use an electric cleaner that requires no management for a long time.

In addition, the present invention particularly provides a vibration suppression filter including at least a first vibration suppression filter that collects large dust on the upstream side with respect to the suction airflow, and a second vibration suppression filter that is disposed downstream from the outer periphery of the first vibration suppression filter and traps fine dust. It is composed of an electric cleaner.

By this invention, large dusts, such as a lump of dust, hair, and food waste, are damped in an upstream 1st dust removal filter, and fine dusts, such as sand, are damped in a downstream 2nd dust removal filter. Therefore, in particular, a pile of dust or the like which tends to be resistant to air passages can be captured on the upstream side and rotated in the dust collecting case, whereby the lowering of the suction force can be prevented more effectively.

Moreover, this invention is an electric vacuum cleaner which installed the air blower which the suction force of an electric blower acts especially in the dust accommodating part.

According to this invention, since the large dust lowered while turning the cylindrical hollow part in the vibration damping filter and guided to the dust container is sucked through the air duct and filtered out by the vibration damping filter, it is more reliably captured in the dust container. To be deposited. Therefore, dust can be reliably picked up and accumulated in the dust accommodating portion, which ensures the air volume maintaining performance and can be used as an electric cleaner which requires no management for a long period of time. It can be prevented, it is possible to provide a cleaner excellent in the air volume maintenance performance by suppressing the decrease in air volume.

In addition, the present invention, in particular, the main air passage reaches the outer periphery of the dust collecting separator via the first dust removal filter and the second dust removal filter from the swirling air flow passage, the secondary wind passage from the dust receiving portion of the third dust removal filter and the second vibration suppression filter The vacuum cleaner reaches the outer circumference of the dust collecting separation unit via.

According to this invention, large dust such as a bundle of dust or hairs is lowered while turning the cylindrical hollow part in the first dust removal filter and guided to the dust container, and the large dust guided to the dust container is directed from the dust container to the third dust filter. Since it is sucked out and filtered out, it is captured and deposited in the dust container more reliably. The fine dust passing through the third vibration damping filter flows in from the lower end of the second vibration damping filter and is filtered out of the second vibration damping filter and removed through the air passage leading to the electric blower side.

Therefore, large dust and fine dust are separated more efficiently, and large dust is reliably picked up and accumulated in the dust container. Therefore, the air volume maintaining performance can be further secured, so that it can be used as an electric cleaner that requires no management for a long time.

In addition, the present invention is a third vacuum cleaner is an electric vacuum cleaner that collects large dust.

According to this invention, when the large dust guided into the dust container is sucked in the direction of the end of the second vibration damping filter through the third vibration damping filter, the large dust such as a bundle of dust or the hair does not pass through the third vibration damping filter. Dust and fine dust are separated. Therefore, especially large dusts, such as a dust bundle and hair which become a large wind path resistance, can be reliably captured in a dust accommodating part, and the fall of air volume can be prevented more effectively.

In addition, the present invention, in particular, the first vibration damping filter is an electric vacuum cleaner comprising at least one of a punching metal, a metal mesh, a resin mesh.

According to this invention, even in the case of dust flowing into the cylindrical dust collecting case, especially when fibrous dust such as cotton dust orbits inside the dust collecting case, the surface is smooth and fine unevenness compared to the mesh dust removing filter. As a result, the fibrous dust is not easily entangled, thereby facilitating continuous turning in the dust collecting case, and it is possible to capture and deposit it in the dust container.

Moreover, especially this invention is a vacuum cleaner in which a 2nd damping filter is cylindrical shape, and is formed by making a pleated member circular shape.

According to such an invention, the area of the filter can be increased by making a pleated shape, the air permeability decreases, and high suction rate can be maintained and secured for a long time.

In addition, the present invention is an electric vacuum cleaner in which the inner surface of the pleated member is substantially U-shaped and round in a cylindrical outer circumferential portion of the second vibration damping filter.

With this invention, it is difficult to adhere and deposit fine dust on the second vibration damping filter due to the rounded concave portion, and the fine dust once adhered is also easily peeled off and prevented further decrease in air volume.

In addition, the present invention, in particular, the vibration suppression filter is a rotating vacuum cleaner.

By this invention, the slight deviation of the dust adhesion distribution in a damping filter can be prevented, the dust adhesion amount can be leveled, and the fall of the air volume by the clogging of a filter can be prevented effectively.

Moreover, this invention is especially the vacuum cleaner comprised so that at least one of the 1st damping filter or the 2nd damping filter may rotate.

By this invention, it is possible to prevent slight bias of the dust adhesion distribution in the first vibration damping filter or the second vibration damping filter, and to achieve the leveling of the dust adhesion amount, and to further effectively prevent the decrease in the air volume due to the clogging of the filter. can do.

In addition, the present invention, in particular, the first dust filter and the second dust filter is an electric vacuum cleaner that rotates in conjunction.

With this invention, it is possible to prevent slight bias in the dust adhesion distribution of both the first vibration suppression filter and the second vibration suppression filter, to achieve leveling of the dust adhesion amount, and to simplify the prevention of the decrease in the air volume due to the clogging of the filter. This can be realized more efficiently.

Moreover, this invention is especially the vacuum cleaner provided with the dust removal means which removes the dust which affixed on the damping filter.

By this invention, fine dust, such as sand dust adhering to a damping filter, can be removed, and clogging of a damping filter can be prevented further, and the fall of air volume can further be prevented.

The invention is furthermore particularly an electric vacuum cleaner with dust removal means in contact with the rotating vibration damping filter.

By this invention, the dust of the circumference adhering to the inner surface of the damping filter can be removed. In addition, a simple configuration for manually rotating arbitrarily, or a rotation driving means and a control means, can be provided to rotate in conjunction with the timing of the operation or stop of the electric blower. It can be secured to prevent a decrease in air volume.

Moreover, this invention is equipped with the dust removal means which contact | connects at least one of the 1st damping filter or the 2nd damping filter which rotates especially, The dust removal means is an electric vacuum cleaner which removes the dust adhering by vibrating the contacted damping filter.

By this invention, since the dust which adhered and accumulated on the inner periphery of a 1st damping filter or a 2nd damping filter can be removed and peeled off more effectively, the fall of air volume can be prevented more effectively.

In addition, the present invention is particularly provided with a dust removing means for abutting at least one of the first dust removal filter or the second dust removal filter, the dust removal means is a vacuum cleaner to scrape or rub off the dust attached to the abutting dust removal filter to be.

By this invention, it can adhere to the inner surface of a 1st damping filter or a 2nd damping filter, and can become clogged and can remove lumps of dust, hair, lint, etc. more efficiently.

Moreover, especially this invention is an electric vacuum cleaner which moves a dust removal means in contact with a damping filter, and removes the dust adhering to this damping filter by vibrating, scraping, or rubbing.

By this invention, the dust of the circumference adhering to the inner surface of the damping filter can be removed. In addition, a simple configuration for manually rotating arbitrarily, or a rotation driving means and a control means, can be provided so as to rotate in conjunction with the timing of the operation or stop of the electric blower. It is possible to prevent the air volume decreases.

Moreover, this invention is especially the 3rd damping filter which is a vacuum cleaner of the shape of a truncated cone with a lower diameter larger than an upper diameter, and opening up and down.

By this invention, the fine dust which peeled and removed from the 3rd damping filter moves along the inclined surface formed by the cone-shaped busbar, and falls to the lower dust accommodating part reliably. Therefore, dust can be prevented from reattaching to a 3rd dust filter, and further, a fall of air volume can be prevented.

Moreover, this invention is especially the vacuum cleaner which is a truncated cone shape with a lower diameter larger than an upper diameter.

According to this invention, even if the dust that is larger than the amount of dust that can be accommodated in the dust container is attracted and dust is accumulated in the cylindrical hollow of the dust removal filter, since the lower part is larger than the upper part, it can be easily removed and removed from the dust removal filter, thereby releasing waste. Electric vacuum cleaner with excellent performance and convenience can be obtained.

Moreover, especially this invention provides an opening part in a part of 3rd vibration damping filter, installs a dust removal means in the vicinity of this opening part, and installs the dust chamber which communicates with this opening part in a dust accommodation part, The dust removed is an electric vacuum cleaner which is accommodated in this dust chamber via this opening.

With this invention, it is possible to prevent reattachment to the vibration suppression filter due to the rolling up of dust during operation, and further, it is possible to provide a cleaner excellent in the air volume maintaining performance by suppressing the decrease in the air volume.

Moreover, this invention is an electric vacuum cleaner which installs the ventilation path which communicates with a dust accommodating part especially in the side wall of a dust chamber, and provided the 4th vibration damping filter in this ventilation path.

By this invention, the air path from the dust container to the dust chamber and the dust filter filter outer periphery can be secured from the dust container, so that the suction air volume is not easily lowered even when the dust is sucked, and a high suction rate is maintained for a long time. Can be secured across.

Moreover, this invention is an electric vacuum cleaner which discharges dust especially by opening the bottom part of a dust accommodating part.

With this invention, fine dust and large dust deposited on the dust container are dropped by the action of gravity, so that the dust in the dust container can be easily discharged, and the waste discharge performance and convenience are more excellent. You can do it with a vacuum cleaner.

In addition, the present invention is, in particular, at least a part of at least one of the dust collecting portion or the dust containing portion is an electric vacuum cleaner formed by the see-through member.

With this invention, it is possible to visually check the turning state of dust and the dust collection amount, and to judge when the dust is to be discarded from the dust collecting case, and to detect an abnormality in the dust collecting part and the like early.

In addition, the present invention is, in particular, at least a part of the vibration suppression filter is an electric vacuum cleaner formed by the see-through member.

According to this invention, since the state of the contents of dust can be visually confirmed, it is easy to find even when a dust other than dust is aspirated at the time of cleaning operation.

When explaining the structure of the vacuum cleaner of this invention more concretely, the suction port which attracts the dust of the to-be-cleaned surface, such as a floor, the electric blower which sucks in the air containing dust from the said suction port, and this electric blower A vacuum cleaner main body to be built-in, a dust separating part which introduces air containing dust sucked by an electric blower and separates it into dust and air, and a dust containing part accommodating the dust separated by this dust separating part. The dust separation unit forms a suction port for introducing air containing dust from the intake port, a swirl air flow passage for flowing air containing dust introduced from the suction port as swirl air flow, and at least a part of the swing air flow passage. It has a vibration damping filter that separates dust and air, and covers the outer circumference of the dust removing filter, and the suction force of the electric blower is applied from the outer circumferential side of the damping filter by the main wind path connected to the suction side of the electric blower. do.

In order to generate the turning air flow, the turning air flow passage is formed into a substantially cylindrical shape, preferably a cylindrical shape, and a suction port is formed so that the air flow turning at the same time in the circumferential direction is generated at the inner wall surface of the turning air flow passage. . That is, the suction direction of the suction port is a cylindrical tangential direction in the direction orthogonal to the cylindrical axial direction so that the suction direction flows along the circumferential direction of the inner wall surface. The substantially cylindrical shape includes a polygonal shape such as an ellipse shape, an octagonal shape, etc. in a plane orthogonal to the axial direction, that is, the swirling airflow along the circumferential direction of the inner wall surface of the swirling airflow passage. What is necessary is just a shape to generate | occur | produce.

 Moreover, in order to generate | occur | produce a turning air stream in a turning air flow path, the suction force of an electric blower acts in a turning air flow path, and it is necessary to generate a negative pressure state. For that purpose, the vibration damping filter part which covered the one end side which provided the suction port of the substantially cylindrical swirling airflow passage with the ceiling part of the dust collecting case, and the other end was airtightly connected with the dust accommodating part, and formed in at least the swirling airflow ventilation passage. What is necessary is just to make a suction force of an electric blower apply | stimulate from the.

In order to achieve a more preferable form, it is good to connect the turning air flow passage and the dust container to the connection part or the dust container to itself, and the air blower which the suction force of an electric blower acts on. By this structure, not only the suction force of the vibration damping filter part but also the suction force in a location closer to the dust accommodating part can be obtained, and the dust which passed through the vibration damping filter becomes easier to move to a dust accommodating part.

The same effect can also be obtained by connecting one end of the blower path to a part of the dust accommodating part and connecting the other end to the suction side of the electric blower, or to a part of the main air path that already forms the other end. It is preferable that a third vibration damping filter is attached to one end of the air blowing path so that dust collected in the dust accommodating portion does not flow to the electric blower side. In particular, in order to make the suction force of the electric blower act on the dust container portion side through the air blower, it is preferable to adopt a configuration in which the third vibration damping filter is hardly clogged.

Therefore, by using the third dust removal filter as a filter for collecting large dust, it can be prevented from clogging and can withstand long-term use. On the other hand, since the fine dust may flow into the air blast path by using a large dust filter, the durability of the electric blower is lowered if it directly enters the suction side of the electric blower. Therefore, when using a 3rd dust removal filter as a large dust filter, it is necessary to provide a fine dust filter upstream rather than the suction side of an electric blower.

Regarding this fine dust filter, if the damping filter located in the main wind path is used as the fine dust filter, the main wind path located on the upstream side of the fine dust filter constituting the damping filter is a method of connecting the negative wind path to the main wind path. It is mentioned to connect a blowing furnace to the. By this connection, fine dust can be collected from the negative wind path by the fine dust filter which comprises a damping filter. Moreover, by this connection method, the fine dust filter exclusively for a blast furnace can be excluded separately, and the manageability of a fine dust filter can be improved.

In addition, in the above-mentioned specific vacuum cleaner, although the vibration damping filter provided in the dust separation part has a self-cleaning effect by the swirling airflow, it is a structure which performs suction from the outer periphery of a dust damping filter, and it cannot fully suppress clogging by dust. Therefore, it is necessary to provide a dust removing means for removing the dust accumulated in the vibration damping filter, and to operate the dust removing means at the timing of starting the operation of the vacuum cleaner and ending the operation, and to remove the dust accumulated on the vibration damping filter. It makes it possible to use it for a long time without degrading.

The timing of operating the dust removing means (also called the vibration damping means) is to examine how much blockage occurs in the vibration suppression filter in the actual cleaning, and the design of the dust separation unit and the type and shape of the vibration suppression filter used. It is preferable to set accordingly. Specifically, the vibration suppression means is operated at a predetermined time at the start of operation, the vibration suppression means is operated at a constant time at the end of operation, or the vibration suppression means is operated at both the start time and at the end of operation. It is preferable to use a motor in order to operate the damping means at this timing.

For example, the on / off control of the motor by the microcomputer can be easily realized, and as part of a series of operations of the control unit (generally realized by the microcomputer) in charge of driving control of the entire vacuum cleaner, Motor control can be added simply.

In addition to the use of the motor described above, it is also possible to use the cord winding mechanism built in the vacuum cleaner for controlling the vibration damping means. That is, when the user pulls out the power cord wound around the cord winding mechanism to start the operation, the cord winding portion of the cord winding mechanism rotates by the pulling output, and when this rotational force is transmitted to the dust removal means, the dust is removed at the start of operation. The means is activated. Moreover, in general, a spring is built in the cord winding mechanism, and when the power cord is pulled out, the cord winding portion of the cord winding mechanism rotates to wind the built-up spring. Then, when the operation is finished and the winding button of the cord winding mechanism (generally disposed to be pressurized to a part of the main body of the vacuum cleaner) is pressed in order to wind the cord, the cord winding unit presses the power cord by the force of the wound spring. Rotate the winding direction to wind the power cord. If the rotational force of the cord winding part at this time is transmitted to the dust removing means, the dust removing means can be operated at the end of the operation.

In this way, the method of operating the dust removing means can be appropriately selected, but if the dust removing means is operated at least at the start of the operation of the vacuum cleaner and at the end of the operation, the clogging of the vibration suppression filter can be eliminated for each operation for cleaning, The performance of the original suction force and suction rate can be maintained for every cleaning operation. In addition, by employing the above-described dust removing means in a configuration in which suction force acts on the outer circumferential side of the vibration suppression filter, that is, a configuration capable of suppressing blockage of the vibration suppression filter by the self-cleaning action, the blockage does not occur for a long period of time. Management can be made unnecessary. In addition, the operation time of the dust removing means can also be shortened as long as it is hard to be clogged. In the case of driving the dust removing means with a motor, the user of the vacuum cleaner is operated even when the operation of the vacuum cleaner is started at the start of operation or at the end of the operation. Ease of use is also good since no effort is required for the transition or cleaning to the cleaning operation.

An embodiment of the present invention will be described below.

 (Example 1)

1 and 2 show an electric vacuum cleaner according to a first embodiment of the present invention.

As shown in FIG. 2, the electric blower 21 which produces | generates the suction airflow is built in the vacuum cleaner main body 1, and the wheel 3 and the caster 4 are external to the vacuum cleaner main body 1; Equipped with a freely moveable bottom surface. In addition, a dust collecting case 5 for introducing air containing dust sucked by the electric blower 21 is provided to the vacuum cleaner main body 1 through the partition 26 having air permeability upstream of the electric blower 21. Detachable is installed.

In addition, the dust collecting case 5 has a shape in which a plurality of hollow cylinders having different diameters are extended in multiple stages. In the first embodiment, the dust collecting case 5 has a three-stage configuration. 22b) and the dust container 24. The case upper part 22a and the case center part 22b are made into the dust separation part 23, and the case upper part 22a is provided with the suction opening 6 which introduces air containing dust from a tangential direction, and is comprised. have.

The dust collecting case 5 communicates from the suction port 6 to the dust container 24 for depositing the dust at the lowermost level, and the air path from the suction port 6 to the electric blower 21 is dust of the dust collecting case 5. The opening 25 provided in the separating part 23 communicates with the partition 26 of the vacuum cleaner main body 1, and is formed. In addition, the dust separation part 23 is provided with a cylindrical vibration damping filter 27.

In addition, as shown in FIG. 1, a suction hose 7 and an extension tube 8 are sequentially connected to the suction port 6, and a suction port 9 is attached to the tip of the extension tube 8. By operating the blower 21, the dust on the bottom surface of a house can be attracted.

In the first embodiment, this cylindrical vibration damping filter 27 has a cylindrical first vibration damping filter 27a composed of a large dust filter upstream and fine dust provided on the outer periphery of the downstream side from the first vibration damping filter. It is comprised by the 2-layered structure of the cylindrical 2nd vibration damping filter 27b which consists of a filter.

The ventilation portion of the first vibration damping filter 27a and the second vibration damping filter 27b is in the middle of the main wind path 29a, which is the first air passage where the suction port 6 of the dust collecting case 5 and the electric blower 21 communicate with each other. I am placing it.

Moreover, the main wind path 29a which extends from the suction port 6 to the electric blower 21 is provided in the outer periphery of the 2nd damping filter 27b from the inside of the 1st damping filter 27a, and the perimeter of the space.

Next, with reference to FIGS. 3A, 3B, 3C, and 3D, details of the dust collecting case 5 and the cylindrical vibration damping filter 27 will be described.

As shown in FIG. 3A, the dust collection case 5 is the shape which arranged the hollow cylinder of the vertical shape in three steps, and the suction port 6 is the circumference | surroundings of the upper case 22a as shown in FIG. 3C. It is arrange | positioned at the eccentric position so that airflow may flow in from the tangential direction of a cross section. In the first embodiment, the dust collecting case 5 is a hollow cylinder. However, the cylinder is not limited to the garden but may be an ellipse, an octagonal shape or a polygonal shape, such as an octagon, or the like, and flows in a tangential direction from the suction port 6. One airflow should just be a shape which turns airflow along the inner surface of the dust collecting case 5. In addition, the cylindrical vibration damping filter 27 is also not limited to the garden, but may be an ellipse, an polygonal shape such as an octagon or a pentagon, or the like, and the swirling airflow generated along the inner surface of the dust collecting case 5. What is necessary is just a shape which can generate | occur | produce also in the cylindrical hollow part of the 1st damping filter 27a.

Therefore, the passage which forms the swirling airflow which generate | occur | produced along the inner surface of the case upper part 22a in the dust separation part 23, and the swirling airflow which generate | occur | produced in the cylindrical hollow part of the 1st damping filter 27a is made into the swirling airflow ventilation path.

Moreover, the arrangement | positioning of the suction opening 6 provided in the case upper part 22a so that the generated turning air flow in the direction of the dust accommodating part 24 is more than the upper end part of the opening part 25 provided in the dust separation part 23. As shown in FIG. The lower end of the suction port 6 is disposed upward. By making the arrangement position of the suction port 6 higher than the opening 25 in this way, the air introduced from the suction port 6 in the tangential direction of the case upper part 22a is downward by the suction force action of the opening part 25 side. It is generated as a turning air stream in the direction of the dust container 24. By the turning airflow which continues descending while making this turning, the big dust 52, such as surface dust, is turned down by wind pressure, and is guided to the dust accommodating part 24. FIG.

The lower part of the dust collecting case 5 is provided with the dust accommodating part 24 which accumulates the dust attracted, and the bottom face of the dust collecting case 5 by the dust accommodating part 24 side becomes an opening-closing lid 31. The opening / closing lid 31 is opened through the hinge 32 so that the dust in the dust container 24 can be discharged.

In addition, although the dust collecting case 5 is comprised by the acrylic resin in the present Example 1, since at least one part is comprised by the see-through member, since the amount of dust inside etc. can be visually confirmed from above, it is preferable. As a transparent member, ABS, a polypropylene, an acrylic resin, etc. can be easily obtained as a member, and it is preferable at the point that workability is good.

As shown in FIG. 3B, the inner wall between the suction port 6 of the cylindrical dust collecting case 5 and the dust container 24 has an outer side between the dust collecting case 5 and the cylindrical dust removing filter 27. The space part 33 provided over the electric pole is provided, and the suction port of the dust collector case 5 and the electric blower 21 will communicate through this space part 33.

Moreover, the inner surface of the case upper part 22a of the dust collecting case 5 becomes one surface as an inner surface and the whole of the inner side 1st damping filter 27a which comprises the cylindrical damping filter 27. As shown in FIG. That is, there is no protrusion which protrudes in the inner surface of the dust collecting case 5.

As shown in FIG. 3D, the cylindrical vibration damping filter 27 has a cylindrical shape so as to surround the inside of the cylindrical dust collecting case 5. The 1st dust removal filter 27a which consists of a large dust filter located upstream with respect to the suction airflow removes dust of relatively large size, such as a surface dust and a hair, from the dust in the suction airflow, and the fine dust located downstream The 2nd damping filter 27b which consists of a filter removes dust, such as sand dust, pollen, and mite dust, whose particle diameter is small, from airflow.

As described above, by providing a plurality of cylindrical vibration damping filters 27 according to the size of the dust to be damped, the frequency of clogging of the vibration damping filter can be reduced, and the air volume sustaining performance can be extended, but it may be a single layer.

As the first vibration damping filter 27a, it is preferable to use a member having a relatively large hole diameter through which fine dust such as sand dust, such as a metal mesh, a punching metal, a resin mesh, and the like can escape. 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 removal filter 27a.

On the other hand, although the non-woven fabric, pulp, glass fiber, HEPA filter, etc. can be used as the 2nd damping filter 27b, the pleated member which formed and connected the nonwoven fabric member etc. which can remove comparatively fine particle efficiently in the form of pleats is connected. By providing a cylindrical shape and providing it in a cylindrical shape, it is possible to secure the vibration damping performance while reducing the ventilation resistance. In addition, the use of a filter coated with a PTFE porous member having good dust peeling property on the dust adhesion surface is more preferable in that the clogging of the second vibration damping filter 27b can be suppressed.

4 is an enlarged main sectional view of a part of the second vibration suppression filter 27b shown in FIG. 3D.

In the first embodiment, as shown in FIGS. 3D and 4, in particular, a sheet-shaped filter having rigidity of about 0.5 micron PTFE membrane with a PET resin as a pleated filter 41 is used. To form a cylindrical shape.

Moreover, in the outer peripheral part of the pleated filter 41, the recessed part 42 of the inner surface of the corrugated member which contacts the upstream side of the suction airflow has a U-shaped round shape of about R = 2-5 mm. have. In addition, the pleats on the side of the pleated filter 41 close to the first vibration suppression filter 27a were not particularly provided with recesses.

The outside of the pleated filter 41, which is the second vibration damping filter 27b, is provided with a seal portion 43 sealed with a resin, a sealant, or the like only in the range of a few millimeters of the upper end and the lower end. It is blocking breathability.

The operation of the vacuum cleaner according to the first embodiment configured as above will be described with reference to FIGS. 5A, 5B, and 5C.

When the electric blower 21 starts to operate, a suction air flow is generated, and dust on the bottom surface is collected into the dust collecting case 5 together with air through the suction port 9, the extension tube 8, and the suction hose 7. Is inhaled. At this time, since the suction port 6 of the dust collecting case 5 is provided eccentrically with respect to the cylindrical cross section, as shown in FIG. 5A, the airflow flowing from the suction port 6 is collected in the dust collecting case 5. It penetrates from the tangential direction of the cylindrical cross section of), and changes to the turning airflow.

The turning airflow generated in the case upper part 22a of the dust collecting case 5 continues descending while turning, and reaches the vicinity of the cylindrical dust removal filter 27. Here, since the 1st damping filter 27a of the upstream side of the cylindrical damping filter 27 does not have the protrusion toward the inside of the dust collection case 5, it does not block the flow of turning airflow, and the air flow does not turn Subsequently, as shown in FIG. 5B, it passes through the 1st damping filter 27a and the 2nd damping filter 27b in order, and is sucked by the electric blower 21 through the space 33. As shown to FIG.

Here, the dust sucked with the suction airflow is guided to the cylindrical vibration damping filter 27 while turning with the flow of the airflow, and among these dusts, fine dust 51 such as sand dust is the first vibration suppression filter 27a. It passes through and is filtered by the 2nd vibration damping filter 27b of an outer side.

In addition, large dust 52 such as surface dust that is light in specific gravity and susceptible to wind pressure is easily peeled off from the surface of the first vibration suppression filter 27a by swirling airflow, and as shown in FIGS. 5B and 5C, the first vibration suppression filter The turning is continued at the cylindrical hollow portion of (27a). By this action, since the self-cleaning action by air flow is performed by the 1st damping filter 27a, it does not become clogged and suppresses the fall of suction force.

Further, when the amount of dust to be sucked is increased, large dust 52 such as surface dust is lowered while turning inside the first dust removal filter 27a and guided to the dust container 24.

As mentioned above, large dust 52, such as surface dust, is turned down by wind pressure, it descends, is guided to the dust accommodating part 24, and fine dust 51, such as sand dust, is carried out by the 1st dust removal filter 27a. In order to escape through the hole of the mesh of (), dust does not accumulate in the 1st damping filter 27a, and air permeability is ensured.

That is, when the dust is sucked in, the dust is reliably separated into the fine dust 51 and the large dust 52, the fine dust 51 is filtered out of the second dust removal filter 27b, and the large dust 52 is dusted. The suction path from the suction port 6 to the electric blower 21 is secured over the periphery of the first and second vibration suppression filters, thereby being able to be prevented from being dropped by the accommodating portion 24.

In addition, the recess 42 of the pleats contacting the upstream side of the suction airflow in the second vibration damping filter 27b has a substantially U-shaped round shape of about 2R to 5R. The sedimentation becomes difficult to adhere and the fine dust once deposited is also easily peeled off, and the decrease in the air volume due to the clogging of the filter can be prevented.

And even when the amount of dust in the dust collecting case 5 increases, when the opening / closing lid 31 is opened, since there are no jams such as protrusions inside the dust collecting case 5, dust can be smoothly discharged and the dust collecting case 5 ) Care for itself is quite simple.

The evaluation test of the airflow rate holding | maintenance performance was performed using the vacuum cleaner of the present Example 1 above. In the test method, household dust was separated into cotton dust and fine dust using a sieve, 4g of cotton dust and 3g of fine dust were mixed, and 7g was sucked at a time to investigate the change of 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, while maintaining a high air volume from the initial stage and maintaining 80% or more of the initial air volume even when suctioning 80 g, the control experiment showed a low air volume from the initial stage and a decrease in air volume. The speed | rate was also fast and it became 80% or less of initial stage air volume in the state which sucked 60g.

In addition, as a result of measuring the suction rate, the thing of this Example 1 was 100 W or more higher than that of the control experiment.

Thus, in the vacuum cleaner of the first embodiment, it is possible to provide a vacuum cleaner in which the suction rate is secured at a high level and the suction power is not easily lowered even when dust is sucked.

In addition, in the present Example 1, although the 2nd damping filter 27b was provided in the front periphery of the 1st damping filter 27a, as shown to the perspective view of FIG. 7 and sectional drawing of FIG. 8A, 8B, it is not the front circumference | surroundings. Even if the second vibration suppression filter 27b is disposed only on the suction side of the electric blower, the same effect is recognized.

In addition, as shown in the broken-line part of FIG. 9A and FIG. 9B, the cutting part is made in the cylindrical vibration damping filter 27, and the window 91 is provided by inserting the transparent arc-shaped see-through member in this cutting part. For this reason, as shown in FIG. 9B, the longitudinal cross section of the dust accumulated in the dust collection case 5 can be visually confirmed, and it becomes easier to discover when the wrong thing other than dust is aspirated at the time of a cleaning operation. .

(Example 2)

Next, Example 2 will be described. Hereinafter, the structure of Example 1 and a difference with operation | movement are demonstrated mainly, The same code | symbol is attached | subjected about the same element as Example 1, and the description of the structure and operation is abbreviate | omitted.

10, 11A, 11B, 11C, and 11D show sectional views of the vacuum cleaner and dust collecting case 5 according to the second embodiment.

As shown in FIGS. 10, 11A, 11B, 11C, and 11D, the difference from the first embodiment is the cylindrical vibration damping filter 27 in the dust collecting case 5 together with the cylindrical vibration damping filter 27. The hollow disk-shaped third vibration damping filter 28 disposed below is provided.

This third vibration damping filter 28 is made of a large dust filter. Like the first vibration damping filter 21, the third vibration damping filter 28 is made of a metal mesh having a ventilation diameter of 250 microns, and both ends thereof have a circumferential end of the first vibration damping filter 27a. Abuts tightly, and the outer end fits tightly with the seal part 43 and the dust accommodating part 24 of the dust collecting case 5 so as to cover up to the seal part 43 on the outer periphery of the lower end side of the second vibration suppression filter 27b. It is placed in contact.

And the air from the suction port 6 is passed through the cylindrical hollow part of the 1st dustproof filter 27a, and the dust accommodation part 24 through this 2nd dustproof filter 28, and the 2nd dustproof filter 27b. This third vibration damping filter 28 is provided in the middle of the sub-wind path 29b which is the second air path flowing in the lower end portion of the circumference.

As described above, the first vibration damping filter 27a, the second vibration damping filter 27b, and the third vibration damping filter 28 communicate with the main air passage in which the suction port 6 of the dust collecting case 5 and the electric blower 21 communicate with each other ( 29a) or in the air blowing path 29b.

The operation of the vacuum cleaner configured as described above will be described with reference to FIGS. 12A, 12B, and 12C.

When the electric blower 21 starts to operate, suction airflow is generated, and dust on the bottom surface is sucked into the dust collecting case 5 through the suction port 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 provided eccentrically with respect to the cylindrical cross section, as shown in FIG. 12A, the airflow flowing from the suction port 6 is collected in the dust collecting case 5. It penetrates from the tangential direction of the cylindrical cross section of), and changes to the turning airflow.

The turning airflow generated in the case upper part 22a of the dust collecting case 5 continues descending while turning, and reaches the vicinity of the cylindrical vibration damping filter 27. Here, since the 1st damping filter 27a of the upstream side of the cylindrical damping filter 27 does not have the protrusion toward the inside of the dust collection case 5, it does not block the flow of turning airflow, and the air flow does not turn Subsequently, as shown in FIG. 12B, it passes through the 1st damping filter 27a and the 2nd damping filter 27b in order, and is suctioned by the electric blower 21 through the space part 33. FIG.

Here, the dust sucked with the suction airflow is guided to the cylindrical vibration damping filter 27 while turning with the flow of the airflow, and among these dusts, the fine dust 51 such as sand dust is the first vibration damping filter 27a. ), It is filtered by the outer 2nd vibration damping filter 27b.

In addition, large dust 52 such as surface dust that is light in specific gravity and susceptible to wind pressure is easily peeled off the surface of the first vibration damping filter 27a by swirling airflow, and as shown in FIGS. 12B and 12C, the first vibration damping filter The turning is continued at the cylindrical hollow portion of (27a). By this action, since the self-cleaning action by air flow is performed by the 1st damping filter 27a, it does not become clogged and suppresses the fall of suction force.

Further, when the amount of dust to be sucked is increased, large dust 52 such as surface dust is lowered while turning inside the first dust removal filter 27a and guided to the dust container 24.

The large dust 52 guided to the dust receiver 24 is recessed in the pleat 42 at the end of the second dust filter 27b through the third dust filter 28 disposed above the dust receiver 24. The suction is carried out in the direction of) so that the dust can be reliably captured and deposited in the dust accommodating portion 24, and at the same time, a compressive action is performed on the large dust 52 to achieve volume shrinkage.

In addition, when the intake path 29b is not present, when the intake path is blocked on the upstream side of the dust collecting case 5, the dust in the dust accommodating portion 24 is almost blown up so as to be reattached to the inner surface of the first dust removal filter 27a. When this intake path 29b communicates with the main air path 29a through the dust receiver 24, when the intake path is blocked on the upstream side, the inflation path 29b becomes a bypass passage and It is possible to prevent the flight in advance.

At this time, in the 1st vibration damping filter 27a, large dust 52, such as surface dust, rotates and descends by wind pressure by turning airflow, and the fine dust 51, such as sand dust, 1st dust removal filter 27a Because it escapes through the hole of the mesh of), dust does not accumulate and ensures breathability.

In addition, the third damping filter 28 is made of a metal mesh, the inner end of the third damping filter 28 is in close contact with the circumferential end of the first damping filter, the outer end is the seal portion 43 provided on the outer periphery of the lower end side of the second damping filter 27b. Since the fine dust 51 mixed with the large dust 52 in the dust accommodating part 24 passes through the 3rd damping filter 28, since it is arrange | positioned so that it may contact | abut tightly), the 2nd damping filter 27b Is filtered out.

That is, when the dust is sucked in, the dust is reliably separated into the fine dust 51 and the large dust 52, the fine dust 51 is filtered out of the second dust removal filter 27b, and the large dust 52 is surely. By being captured by the dust container 24, the suction path from the suction port 6 to the electric blower 21 is secured over the circumference of the first and second vibration suppression filters, so that the amount of airflow can be prevented.

In Example 2, the same evaluation test as in Example 1 was carried out.

As a result, as shown in FIG. 13, it turns out that air flow rate retention performance is more excellent than Example 1 in this Example 2. FIG.

Thus, in addition to Example 1, by arrange | positioning the 3rd dustproof filter 28 in the dust collection case 5, since big dust is reliably captured and deposited in the dust accommodating part 24, the fall of air volume is further prevented, You can do it with a useful electric cleaner.

In addition, although the 2nd vibration damping filter 27b and the 3rd vibration damping filter 28 were provided in the periphery of the 1st vibration damping filter 27a in this Embodiment 3, although it is not the whole periphery like Example 1, The same effect is recognized even if the 2nd damping filter 27b and the 3rd damping filter 28 are arrange | positioned only on the suction side of an electric blower (not shown).

(Example 3)

Next, Example 3 of the present invention will be described. In the following, the configuration of the first and second embodiments and differences from the operation will be mainly described, and the same elements will be denoted by the same reference numerals, and the description of the configuration and operation will be omitted.

Fig. 14 is a sectional view of the main part, viewed from above of a portion of the cylindrical vibration damping filter 27. Other things are the same as in Example 2.

As shown in FIG. 14, the drive gear 141 is provided in the sealing part 43 of the upper outer periphery of the 2nd damping filter 27b which comprises the cylindrical damping filter 27, and this drive gear ( The second vibration damping filter 27b and the first vibration damping filter 27a are integrally formed by the other driving gear 142 engaging with the 141 and the rotation motor 143 which drives the driving gear 142 in rotation. To rotate.

In this manner, both the first vibration damping filter 27a and the second vibration damping filter 27b may be configured to rotate, the second vibration damping filter 27b may be configured to rotate, or the first vibration damping filter may be used. The drive gear 141 may be provided at 27a, and the drive gear 142 and the rotation motor 143 may be configured to rotate only the first vibration suppression filter 27a as described above.

The first vibration damping filter 27a and the second vibration damping filter 27b are rotated by the drive of the rotary motor 143, whereby dust is produced depending on the locations of the first vibration damping filter 27a and the second vibration damping filter 27b. It is possible to prevent a state in which a large amount of dust adheres to the vicinity of the partition 26 in which the deposition amount of is unbalanced and is not constant, that is, the suction force of the electric blower 2 acts strongly. And the adhesion amount of the dust in the 1st damping filter 27a and the 2nd damping filter 27b can be leveled, and the fall of the air volume by the clogging of a filter can further be prevented.

As mentioned above, the evaluation test of the airflow volume retention performance was performed using the vacuum cleaner of the present Example 3. As shown in FIG. In the test method, domestic dust was separated into cotton dust and fine dust using a sieve, 4g of cotton dust and 3g of fine dust were mixed, and 7g was sucked at a time to investigate the change in air volume. The result is shown in FIG.

As shown in FIG. 15, it can be seen that in the third embodiment, the air volume maintaining performance is superior to the second embodiment.

Thus, in the vacuum cleaner of the third embodiment, it is possible to provide a vacuum cleaner in which the suction rate is secured at a high level and the amount of suction air is not easily lowered even when the dust is sucked in.

Also, in the third embodiment, the second vibration damping filter 27b and the third vibration damping filter 28 are provided around the first circumference of the first vibration damping filter 27a, but the second vibration damping filter 27b and the third vibration damping filter are provided. The same effect is recognized even if it arrange | positions only 28 to the suction side of an electric blower (not shown).

(Example 4)

Next, Example 4 of the present invention will be described. Hereinafter, the structure of Examples 1 to 3 will be described mainly for differences from the operation, and the same elements will be denoted by the same reference numerals, and the description of the structure and operation will be omitted.

16A, 16B, and 17 show the dust collecting case 5 of the vacuum cleaner of the fourth embodiment, and sectional views of the main parts thereof. In FIG. 16A and FIG. 16B, the 1st dust removal means 161 is being fixed in at least 1 place of the upper part or the lower part of the dust collecting case 5. As shown in FIG.

Here, as shown in FIG. 17, the 1st dust removal means 161 is a HERA (bone iron) shape which pointed at both ends, and is pressed against the inner periphery of the 1st damping filter 27a.

At this time, as described in the third embodiment, the drive gear 141 on the second vibration suppression filter 27b is rotated by the rotation motor 143 and the drive gear 142, and the second vibration suppression filter 27b is performed. ) And the first vibration damping filter 27a are integrally rotated, the first dust removing means 161 slides while pressing the inner surface of the first vibration damping filter 27a. Therefore, the inner surface of the first vibration damping filter 27a can be cleaned, and dust such as surface dust and lint adhered or entangled on the inner surface of the first vibration damping filter 27a can be removed, and the second vibration damping filter 27a can be removed. It is possible to secure air permeability and to prevent a decrease in air volume.

In addition, in the fourth embodiment, the first vibration suppression filter 27a is set to rotate in one second and 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 a control means (not shown). It is assumed that both of the second vibration damping filter 27b and the first vibration damping filter 27a are integrally rotated.

In addition, although only one 1st dust removal means 161 was used here, it is more effective to make it multiple.

In addition, although the shape of the 1st dust removal means 161 was made into the shape of the shape here, when a shape is changed to a blush shape, the raising shape, etc. according to the kind of deposit | attachment, a shape-specific effect can be acquired.

In addition, as shown in FIG. 16A, the rod-shaped thing was mounted in the vertical direction on the upper part of the dust collecting case 5 as the 1st dust removal means 161 here, As shown in FIG. When the inner periphery of 27a) is pressed and mounted in a spiral shape, the shearing effect is increased when the first vibration damping filter 27a is rotated, and it is possible to clean while cutting tangled hair, sila, etc. Will increase.

(Example 5)

Next, Example 5 of the present invention will be described. Hereinafter, the structure of Embodiments 1 to 4 and differences from the operation will be described mainly, and the same elements will be denoted by the same reference numerals, and the description of the structure and operation will be omitted.

19A and 19B show cross-sectional views of the vacuum cleaner of the fifth embodiment.

19A is a longitudinal sectional view of the dust collecting case 5 of the vacuum cleaner of the fifth embodiment. In FIG. 19A, the 2nd dust removal means 191 is provided in the outer side of the 2nd dustproof filter 27b. In addition, as shown in FIG. 20, the enlarged view of the main part, the 2nd dust removal means 191 is equipped with the striking part 201 which bent the metal foil and made it into the spring.

The drive gear 141 is connected to the second vibration suppression filter 27b and the first vibration suppression filter 27a.

) Is mounted to interlock with the second vibration damping filter 27b, and the first vibration damping filter 27a and the second are rotated by rotating the driving gear 141 by the rotation motor 143 and the driving gear 142. The vibration damping filter 27b is rotated.

As shown in FIG. 19B and FIG. 20, when the 1st vibration damping filter 27a and the 2nd vibration damping filter 27b rotate, the striking part 201 provided in the 2nd dust removal means 191 will be a 2nd vibration damping filter. The second dust is applied to (2b) by dropping the fine dust 51 deposited and deposited inside the pleated filter 41 having a substantially U-shape of the second vibration suppression filter 27b. The vibration damping filter 27b can be cleaned. In addition, by continuing the rotation, the entire circumference of the second vibration suppression filter 27b can be cleaned.

In addition, here, the 2nd vibration damping filter 27b is set to rotate for 1 second and 5 second, and the control switch which is not shown in figure turns on the power switch of the motor 143 for 5 second immediately after the electric blower 21 stops. The second vibration damping filter 27b and the first vibration damping filter 27a are interlocked to both rotate.

Therefore, after stopping the electric blower 21, cleaning of the 2nd vibration damping filter 27b can be performed for 5 second, and the dust adhering around the 2nd vibration damping filter 27b can be dropped.

Also in the present Example 5, the evaluation test of the airflow volume retention performance similar to Example 1 was performed. As a result, as shown in FIG. 21, it turns out that air flow volume retention performance is more excellent than Example 2 in this Example 5. FIG.

In this way, the dust attached to the second dust collecting filter 27b is removed and cleaned by using the second dust removing means 191 by rotating the first dust removing filter 27a and the second dust removing filter 27b. Therefore, the fall of air volume can be prevented further.

In addition, although the striking part 201 used the spring which bent the metal foil as a 2nd dust removal means here, it may be a plate-shaped thing, elastic bodies, such as rubber | gum, etc. may be sufficient as it.

(Example 6)

Next, Example 6 of the present invention will be described. Hereinafter, the structure of Embodiment 1 thru | or 5 and a difference with an operation | movement are demonstrated mainly, The same code | symbol is attached | subjected about the same element, and the description of the structure and operation is abbreviate | omitted.

22 is a perspective view of the dust collecting case 5 of the vacuum cleaner according to the sixth embodiment of the present invention.

In FIG. 22, the third dust removing means 221 is fixed to the case upper part 22a of the dust collecting case 5, and the case upper part 22a is comprised so that it may rotate while maintaining airtightness with the case center part 22b. .

Here, as shown in FIG. 23, the 3rd dust removal means 221 is the shape of the hera (bone iron) which pointed at both ends, and is pressed against the inner periphery of the 1st damping filter 27a.

At this time, when the upper case 22a is rotated, the third dust removing means 221 slides while pressing the inner surface of the first dust removing filter 27a, thereby cleaning the inner surface of the first dust removing filter 27a, Since dust such as surface dust and lint attached to the inner surface of the first vibration damping filter 27a can be removed, air permeability of the first vibration damping filter 27a can be secured to prevent a decrease in air volume.

In addition, although one 3rd dust removal means 221 is shown here, when it is multiple, it is more effective.

In addition, although the shape of the 3rd dust removal means 221 was made into the shape of the hera, here, if a shape is changed to a blush shape, the raising shape, etc. according to the kind of deposit | attachment, a shape-specific effect can be acquired.

In addition, although the 3rd dust removal means 221 was mounted in the vertical direction here, when it makes it mount in a spiral shape with an angle as shown in FIG. 24, when a 3rd dust removal means 221 is rotated, the shear effect Increasing, it is possible to clean while cutting tangled hair, silage and the like, the effect is further increased.

As the means for rotating the third dust removing means 221 fixed to the upper part of the case 22a, for example, a method of manually rotating the device in an arbitrary direction that can simplify the configuration may be used or not shown. It is possible to rotate the third dust removing means 221 in conjunction with the timing of the operation or stop of the electric blower 21 with the rotation driving means and the control means.

(Example 7)

Next, Example 7 of the present invention will be described. Hereinafter, the structure of Examples 1-6 and the difference with operation | movement are demonstrated mainly, The same code | symbol is attached | subjected about the same element, and the description of the structure and operation is abbreviate | omitted.

25 is a perspective view of the dust collecting case 5 of the vacuum cleaner according to the seventh embodiment of the present invention, and FIG. 26 is a fourth dust removing means (cylinder basket 251) of the vacuum cleaner according to the seventh embodiment of the present invention. The main part sectional drawing is shown.

FIG. 25 shows a cylindrical basket 251 serving as a fourth dust removing means in the space 33 on the outside of the second vibration suppression filter 27b. In the seventh embodiment, as shown in FIG. 25, the cylindrical basket 251 connects the upper and lower cylindrical rotating gears 252 with a plurality of connecting portions 253, and the striking portion 254 is connected to the connecting portions 253. It is comprised by attaching. As shown in Fig. 26, the striking portion 254 is formed by bending a metal foil to form a spring, and is attached to the connecting portion 253.

The cylindrical basket 251 is rotated by rotating the cylindrical rotating gear 252 with the driving gear 256 provided in the motor 255, and the second vibration damping filter 27b is applied to the striking portion 254. Vibration or hitting the outer periphery of the.

When the cylindrical basket 251, which is the fourth dust removing means, rotates, the striking portion 254 vibrates or strikes the outer periphery of the second vibration damping filter 27b, so that the pleats of the second vibration damping filter 27b are removed. The second vibration damping filter 27b can be cleaned by dropping the fine dust 51 attached and deposited on the inside, particularly the recess 42. In addition, by continuing the rotation, the entire circumference of the second vibration suppression filter 27b can be cleaned.

In addition, here, the cylindrical basket 251 is set to rotate for 1 second and 5 second, and the power switch of the motor 255 enters for 5 second immediately after the stop of the electric blower 21 by the control means not shown, and 4th The rotating basket 251 which is a vibration damping means was rotated once, so that the entire circumference of the second vibration damping filter 27b was cleaned.

In Example 7, the evaluation test of the air volume maintaining performance was performed as in the other examples.

As a result, as shown in FIG. 27, it turns out that air flow rate retention performance is more excellent in Example 7 than Example 2. FIG.

In this manner, by rotating the cylindrical basket 251 as the fourth dust removing means, the dust adhering to the second dust collecting filter 27b is removed and cleaned, whereby a decrease in air volume can be further prevented.

In addition, although the metal part which bent the metal foil was used as the striking part 254 here, it may be a plate-shaped thing, elastic bodies, such as rubber | gum, etc., it is good.

In addition, although only the cylindrical basket 251 which is 4th dust removal means was rotated here using the control means which is not shown in figure, similarly, the 3rd dust removal means 221 of Example 6 was rotated using this control means. You may make it rotate, and you may rotate these at the same time or to shift time.

(Example 8)

Next, Example 8 of the present invention will be described. Hereinafter, the structure of Examples 1-7 and the difference with operation | movement are demonstrated mainly, The same code | symbol is attached | subjected about the same element and the description of the structure and operation is abbreviate | omitted.

28 is a side cross-sectional view of the dust collecting case 5 of the vacuum cleaner according to the eighth embodiment of the present invention, in which dust is accumulated in FIG. 29A, and in the state in which the opening and closing lid 31 is opened in FIG. 29B. A side cross-sectional view is shown.

As shown in Fig. 28, in the eighth embodiment, the third vibration damping filter 28 is formed in a substantially conical shape with the top and bottom open, and the upper diameter of the cone is the first dust collecting filter 27a.

) To match the bottom diameter. In addition, the lower diameter of the cone is smaller than the inner diameter of the bottom of the dust container 24, and the bottom of the cone is brought into tight contact with the bottom of the dust container 24. Other than that is the same as that of Example 1 of this invention. In this case, the third vibration damping filter 28 is made of a metal mesh having a ventilation diameter of 250 microns, similarly to the first embodiment.

Even if the third vibration damping filter 28 has an approximately conical shape with the upper and lower sides open, the air flow is the same as in the first embodiment, the fine dust 51 is filtered out of the second vibration damping filter, and the large dust 52 is dusted. It catches and accumulates in the accommodating part 24.

Here, the fine dust 51 which peeled and dropped from the 2nd vibration suppression filter using the 4th dust removal means etc. which are shown in Example 7 is an outer side of the 3rd vibration suppression filter 28 as shown to FIG. 29A. It moves on the inclined surface formed by the cone bus bar, and falls to the bottom face of the dust accommodating part 24 reliably. For this reason, the distance between the fine dust 51 which fell and the 2nd dust removal filter 27b can be reduced, and the suction effect to the fine dust 51 which fell fell, and the 2nd dust removal of the fine dust 51 was reduced. Since reattachment to the filter 27b can be prevented, the fall of air volume by the clogging of a filter can be prevented.

Further, by making the third vibration suppression filter 28 into the shape of a truncated cone as described above, even if large dust 52 accumulates inside the third vibration suppression filter 28, since the lower space is larger than the upper space, the large dust 52 ), The pressure contact with the third vibration damping filter 28 is not easily caused. As shown in FIG. 29B, when the opening / closing cap 31 is opened through the hinge 32 provided on the bottom surface of the dust container 24, the dust is easily caused by the action of gravity, so that the third dustproof filter 28 is easily removed. Since it can be removed and removed from the dust, dust can be discharged without jamming, and a vacuum cleaner having excellent waste discharge performance can be obtained.

(Example 9)

Next, Example 9 of the present invention will be described. Hereinafter, the structure of Embodiments 1-8 and the difference with an operation | movement are demonstrated mainly, The same code | symbol is attached | subjected about the same element and the description of the structure and operation is abbreviate | omitted.

Fig. 30 is a side sectional view of the dust collecting case 5 of the vacuum cleaner according to the ninth embodiment of the present invention, in which dust is accumulated in Fig. 31A, and in the state in which the opening and closing lid 31 is opened in Fig. 31B. The side cross-sectional view of is shown.

As shown in FIG. 30, in Example 9, the shape of the 1st damping filter 27a is made into the cone shape which made the lower diameter larger than the upper diameter.

By making the shape of the 1st damping filter 27a into the above-mentioned cone shape, as shown in FIG. 31A, the dust more than the amount of dust which can be accommodated in the dust accommodating part 24 is attracted, and the 1st damping filter 27a is carried out. Even if large dust 52 accumulates inside, the lower space is wider than the upper space, so that the pressure contact with the first vibration damping filter 27a due to the spread of the large dust 52 does not occur easily. As shown in FIG. 31B, when the opening / closing lid 31 is opened through the hinge 32 provided on the bottom surface of the dust container 24, the dust is easily removed by the action of gravity. Since the dust is removed from the dust, the dust can be discharged without jamming, and the vacuum cleaner excellent in the waste discharge performance can be obtained.

(Example 10)

Next, Example 10 of the present invention will be described. The following description will focus on the differences between the structures and operations of Embodiments 1 to 9, the same elements being denoted by the same reference numerals, and the description of the structures and operations will be omitted.

32A, 32B, and 33 show the configuration of the tenth embodiment. An opening 321 is provided in a part of the third vibration damping filter 28. Moreover, below this opening part 321, the dust chamber 322 which accommodates the dust removed by the 2nd dust removal means 191 is provided. The dust chamber 322 is partitioned and formed in the dust container 24, and the dust removed by the 2nd dust removal means 191 is accommodated in this partition dust chamber 322. As shown in FIG.

Moreover, as shown to FIG. 32A, 32B, 33 so that the dust removed by the 2nd dust removal means 191 can reliably be accommodated in the dust chamber 322 from the opening part 321, 2nd dust removal means 191 The opening part 321 and the dust chamber 322 which communicated with this opening part 321 are arrange | positioned just underneath. Moreover, by matching the shape of the opening part 321 and the inlet of the dust chamber 322, the dust which fell to the opening part 321 can be accommodated in the dust chamber 322 reliably.

In addition, by providing the dust chamber 322 in the dust container 24, when the dust accommodated in the dust container 24 is thrown into the trash bin, the dust in the dust chamber 322 can be discarded at the same time.

In addition, an air vent 323 is provided in the dust chamber 322, and a fourth vibration damping filter 324 that blocks the air vent 323 is provided. The vent diameter of the fourth vibration damping filter 324 is composed of a metal mesh having a vent diameter of 250 microns which is the same as that of the third vibration damping filter 28.

In addition, the arrangement in the suction air path of the fourth vibration damping filter 324 is similar to the case of the third vibration damping filter 28, and the air from the suction port 6 passes through the cylindrical hollow portion and dust of the first vibration damping filter 27a. It is provided in the middle of the sub-wind path 29b which is the 2nd air path which flows through the accommodating part 24 and the lower end part of the 2nd dustproof filter 27b through the ventilation opening 323 of a 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 accommodated in the dust chamber 322 by falling into the opening 321 provided in the third dust removing filter 28. By installing the dust chamber 322 which accommodates the fine dust 51 in the dust container 24, the amount of rewinding of the dust at the time of cleaning can be reduced more, and the main wind path 29a which is a 1st air path, It is possible to prevent a decrease in the amount of air passing through the secondary air passage 29b.

In addition, by providing the ventilation opening 323 in the dust chamber and blocking the ventilation opening 323 with the fourth dust removal filter 324 of the metal mesh, the secondary air passage 29b can be secured. Therefore, as described in the second embodiment, when the dust is sucked in, the large dust 51 is trapped by the dust accommodating portion 24. Therefore, the dust is sucked around the first dust filter 27a and the second dust filter 27b. A wind path is secured over the airflow to prevent a decrease in airflow.

In addition, the removed fine dust 51 is housed separately from the large dust 52 in the divided dust chamber 322 to the second vibration damping filter 27b by winding up the fine dust 51 during cleaning. Reattachment can be prevented, and the fall of the air volume passing through the main air path 29a which is a 1st air path and the sub-wind path 29b which is a 2nd air path can be prevented more effectively.

1 is an overall view of an electric cleaner according to a first embodiment of the present invention.

2 is a cross-sectional view showing a configuration of a main part of a main body of the vacuum cleaner according to the first embodiment of the present invention.

Figure 3a is a front sectional view of the dust collecting case of the vacuum cleaner according to the first embodiment of the present invention.

Figure 3b is a side cross-sectional view of the dust collecting case of the vacuum cleaner according to the first embodiment of the present invention.

3C is a cross-sectional view taken along the line A-A of FIG. 3B.

3D is a cross-sectional view taken along line B-B in FIG. 3B.

4 is a sectional view of an essential part of a second vibration suppression filter of the vacuum cleaner according to the first embodiment of the present invention;

Fig. 5A is a plan sectional view showing the flow of airflow in the vicinity of a suction port in the dust collecting case of the vacuum cleaner according to the first embodiment of the present invention.

Fig. 5B is a plan sectional view showing the flow of airflow in the vicinity of the vibration suppression filter in the dust collecting case of the vacuum cleaner according to the first embodiment of the present invention.

Fig. 5C is a longitudinal sectional view showing the longitudinal air flow in the dust collecting case of the vacuum cleaner according to the first embodiment of the present invention.

6 is a graph showing a relationship between a dust collector and a suction air volume change according to a vacuum cleaner and a comparative example according to Example 1 of the present invention;

7 is a perspective view of a dust collecting case of another form of the vacuum cleaner according to the first embodiment of the present invention.

8A is a side cross-sectional view of another type of dust collecting case of the vacuum cleaner according to the first embodiment of the present invention.

FIG. 8B is a cross-sectional view taken along the line B-B in FIG. 8A. FIG.

9A is a front sectional view of another type of dust collecting case of the vacuum cleaner according to the first embodiment of the present invention.

9B is a sectional view taken along the line B-B in FIG. 9A.

Fig. 10 is a sectional view showing the structure of a main part of a main body of the vacuum cleaner according to the second embodiment of the present invention.

11A is a front sectional view of the dust collecting case of the vacuum cleaner according to the second embodiment of the present invention.

11B is a side cross-sectional view of the dust collecting case of the vacuum cleaner according to the second embodiment of the present invention.

FIG. 11C is a cross-sectional view taken along the line A-A of FIG. 11B. FIG.

FIG. 11D is a sectional view taken along the line B-B in FIG. 11B. FIG.

Fig. 12A is a sectional plan view showing the flow of airflow in the vicinity of a suction port in the dust collecting case of the vacuum cleaner according to the second embodiment of the present invention.

12B is a sectional view showing the flow of airflow in the vicinity of the vibration suppression filter in the dust collecting case of the vacuum cleaner according to the second embodiment of the present invention.

12C is a longitudinal sectional view showing the longitudinal air flow in the dust collecting case of the vacuum cleaner according to the second embodiment of the present invention;

13 is a graph showing a relationship between a vacuum cleaner according to a second embodiment of the present invention and a change in household dust collection amount and suction air volume according to the first embodiment;

14 is a sectional view of an essential part showing a configuration of a drive cog of an electric vacuum cleaner according to a third embodiment of the present invention;

15 is a graph showing a relationship between a vacuum cleaner according to a third embodiment of the present invention and a change in household dust collection amount and intake air volume according to the second embodiment;

16A is a side sectional view of a dust collecting case according to Embodiment 4 of the present invention;

16B is a cross-sectional view taken along the line B-B in FIG. 16A.

17 is an essential part cross sectional view showing the operation of the first dust removing means of the vacuum cleaner according to the fourth embodiment of the present invention;

18 is a perspective view of a dust collecting case provided with first dust removing means of another form of the vacuum cleaner according to Embodiment 4 of the present invention.

19A is a side sectional view of a dust collecting case according to a fifth embodiment of the present invention.

19B is a sectional view taken along the line B-B in FIG. 19A.

20 is an essential part cross sectional view showing the operation of the second dust removing means of the vacuum cleaner according to the fifth embodiment of the present invention;

21 is a graph showing a relationship between a vacuum cleaner according to a fifth embodiment of the present invention and a change in household dust collection amount and suction air volume according to the second embodiment;

22 is a perspective view of a dust collecting case of the vacuum cleaner according to the sixth embodiment of the present invention.

Fig. 23 is a sectional view of principal parts showing operation of third dust removing means of the vacuum cleaner according to Embodiment 6 of the present invention.

Fig. 24 is a perspective view of a dust collecting case provided with third dust removing means of another form of the vacuum cleaner according to the sixth embodiment of the present invention.

25 is a perspective view of a dust collecting case of the vacuum cleaner according to the seventh embodiment of the present invention.

26 is an essential part cross sectional view showing the operation of the fourth dust removing means of the vacuum cleaner according to the seventh embodiment of the present invention;

Fig. 27 is a graph showing a relationship between a vacuum cleaner according to a seventh embodiment of the present invention and a change in household dust collection amount and suction air volume according to the second embodiment;

28 is a perspective view of a dust collecting case of the vacuum cleaner according to the eighth embodiment of the present invention.

29A is a side sectional view showing a state in which dust is accumulated in a dust collecting case of the vacuum cleaner according to the eighth embodiment of the present invention;

29B is a side sectional view showing a state in which dust is opened by opening and closing a lid of the dust collecting case of the vacuum cleaner according to the eighth embodiment of the present invention;

30 is a perspective view of a dust collecting case of the vacuum cleaner according to the ninth embodiment of the present invention.

31A is a side sectional view showing a state in which dust is accumulated in a dust collecting case of the vacuum cleaner according to the ninth embodiment of the present invention;

31B is a side sectional view showing a state in which dust is opened by opening and closing a lid of the dust collecting case of the vacuum cleaner according to the ninth embodiment of the present invention;

32A is a side sectional view of a dust collecting case according to a tenth embodiment of the present invention;

32B is a sectional view taken along the line B-B in FIG. 32A.

33 is a perspective view of a dust collecting case of the vacuum cleaner according to the tenth embodiment of the present invention.

(Explanation of symbols for the main parts of the drawing)

1 cleaner body

5 dust collection case

6 suction port

21 electric blower

22a case top

22b center of case

23 Dust separator

24 Dust Receptacle

27 dust removal filter

27a first dust removal filter

27b 2nd damping filter

28 3rd dust removal filter

29a first air path (main air path)

29b Second air path

31 lid

33 Space

41 pleated filter

42 recess

43 Seal

51 fine dust

52 large dust

161 first dust removing means

191 Second dust removal means

221 third dust removal means

251 cylindrical case (fourth dust removing means)

324 fourth vibration damping filter

Claims (13)

An electric blower generating a suction force; The case has a suction port for sucking air containing dust by the electric blower and generates a swirling air flow in the air drawn from the suction port, and has a hollow vibration damping filter disposed below the upper case. And a dust separation unit including a case center part having a space in an outer circumferential direction of the vibration suppression filter. A dust accommodating portion disposed below the dust separator in communication with the dust separator, and configured to receive dust separated from the dust separator; Fine dust filters installed downstream of the vibration suppression filter; And Rotating driving means for rotating at least one side of the vibration suppression filter or the fine dust filter, The air introduced from the suction port and the swirling air flow in the upper part of the case lowers the hollow part of the vibration damping filter in the center of the case and simultaneously the air passing through the vibration damping filter reaches the electric blower through the space. Electric cleaner. The method of claim 1, The fine dust filter is formed with a pleated member in a cylindrical shape, characterized in that the vacuum cleaner is installed on the outer periphery of the vibration suppression filter. The method according to claim 1 or 2, The dust removal filter and the fine dust filter is configured to rotate in conjunction with the electric cleaner. The method according to claim 1 or 2, And a dust removing means for contacting at least one of the rotating dust removing filter and the fine dust filter. The method of claim 4, wherein The dust removing means is to remove the dust by scraping or rubbing the dust on the contact dust removal filter, and by removing the dust by vibrating the contact with the fine dust filter. An electric blower generating a suction force; The case has a suction port for sucking air containing dust by the electric blower and generates a swirling air flow in the air drawn from the suction port, and has a hollow vibration damping filter disposed below the upper case. And a dust separation unit including a case center part having a space in an outer circumferential direction of the vibration suppression filter. A dust accommodating part disposed under the dust separator in communication with the dust separator and accommodating the dust separated from the dust separator; Fine dust filters installed downstream of the vibration suppression filter; Dust removal means which rotates while contacting at least one of the vibration suppression filter or the fine dust filter; And And rotating driving means for rotating the dust removing means, The air introduced from the suction port and the swirling air flow in the upper part of the case lowers the hollow part of the vibration damping filter in the center of the case and simultaneously the air passing through the vibration damping filter reaches the electric blower through the space. Electric cleaner. The method of claim 6, The fine dust filter is formed with a pleated member in a cylindrical shape, characterized in that the vacuum cleaner is installed on the outer periphery of the vibration suppression filter. The method according to claim 6 or 7, The dust removing means is to remove the dust by scraping or rubbing the dust on the contact dust removal filter, and by removing the dust by vibrating the contact with the fine dust filter. The method according to claim 6 or 7, The dust removing means is configured on the outer periphery of the fine dust filter having a hitting portion in the plurality of connection of the cylindrical cargo type, Rotating the dust removing means to the vibration hitting the outer periphery of the fine dust filter in the blower portion, characterized in that the electric cleaner. The method according to any one of claims 1, 2, 6, and 7, The vibration suppression filter may include at least one of a punching metal, a metal mesh, and a resin mesh. An electric blower generating a suction force; The case has a suction port for sucking air containing dust by the electric blower and generates a swirling air flow in the air drawn from the suction port, and has a hollow vibration damping filter disposed below the upper case. And a dust separation unit including a case center part having a space in an outer circumferential direction of the vibration suppression filter. A dust accommodating portion disposed below the dust separator in communication with the dust separator, and configured to receive dust separated from the dust separator; A main wind path introduced from the suction port and becoming a swirling air flow in the upper part of the case, descends the hollow part of the vibration damping filter and passes through the vibration damping filter and reaches the electric blower through the space; A blowing air passage in which the dust container is in communication with the space, and the air from the suction port reaches the space from the dust container via the hollow part of the dust removal filter; Fine dust filter installed on the outer periphery of the vibration damping filter; Rotary drive means for rotating the fine dust filter; And It is provided with a dust removing means in contact with the rotating fine dust filter, The dust blowing means is provided with a large dust filter having an opening in a part of the air blowing path, a dust chamber communicating with the opening in the dust accommodating part, and the dust removing means being provided above the opening. And the removed dust is accommodated in the dust chamber via the opening. The method of claim 11, The fine dust filter is formed with a pleated member in a cylindrical shape, characterized in that the vacuum cleaner is installed on the outer periphery of the vibration suppression filter. The method according to claim 11 or 12, wherein And a ventilation hole communicating with the dust container on a side wall of the dust chamber, and a large dust filter disposed in the ventilation hole.

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