JP2005058787A - Vacuum cleaner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vacuum cleaner of cyclone type, preventing lowering of quantity of dust sucked as compared with the capacity when the interior of the capacity of a dust storing chamber is fully occupied with bulky dust such as fibrous dust. <P>SOLUTION: In the vacuum cleaner 1, the air including dust sucked from a suction body 3 by sucking air generated by a motor-driven blower 61 is guided to a dust collecting case 12, and the dust is separated from the air by centrifugal separation and collected. The vacuum cleaner 1 includes: a dust separation chamber 32 for forming the air including the sucked dust into a turning flow to centrifuge the dust from the air; a dust storing chamber 33 for storing the dust centrifuged in the dust separation chamber 32; a suction cylinder 34 for sucking the air in the dust storing chamber 33 substantially from above the center and making the sucked air flow together with the air in the dust separation chamber 32 into a sucked air passage 26; and an outer cylinder 38 disposed to freely move up and down concentrically with the suction cylinder 34, in which the peripheral edge part of the lower end is provided with a dust remover 39 in contact with a filter 36 mounted on the lower end side of the suction cylinder 34. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a vacuum cleaner provided with a cyclone type dust collecting unit that separates dust from air containing dust by centrifugal separation by turning swirling air.

  Vacuum cleaners equipped with a cyclone type dust collector have little reduction in air intake capacity due to an increase in the amount of dust collected, and do not require consumables for dust collection such as paper packs. It has the characteristics.

  As a prior art of the vacuum cleaner provided with the said cyclone type dust collecting part, what was disclosed by patent document 1 and patent document 2, for example is known, and the air containing the inhaled dust is made into a swirl flow. By forming, dust is separated from the air by centrifugal separation, and the separated dust is deposited at the lower part of the dust collecting portion.

FIG. 12 shows a configuration of a vacuum cleaner body of a cyclone type electric vacuum cleaner according to the prior art. By rotating the electric blower 101 built in the vacuum cleaner main body 100, the air containing dust sucked from the intake port 102 to which the suction hose (not shown) having a suction tool connected to the tip is connected, It flows into the dust separation chamber 104 from the guide channel 103 formed in the swirl flow. The dust separation chamber 104 is formed in a substantially cylindrical shape as shown in FIG. 13, and the flow direction of the air sucked in by the guide flow path 103 becomes the tangential direction of the cylinder, and the cross-sectional area of the flow path is narrowed. The air flowing into the dust separation chamber 104 becomes a high-speed swirling flow, and the dust is separated from the air by centrifugal separation using the swirling flow. And deposits on the bottom of the dust chamber 106. The air in the dust storage chamber 106 passes through the first filter 107 from substantially the center, and is sucked into the electric blower 101 through the second filter 108 together with the air in the dust separation chamber 104.
JP 2000-342492 A Japanese Patent Laid-Open No. 9-253011

  The conventional cyclone type vacuum cleaner simply deposits in the dust storage chamber 106 as described above, so that it is bulky for the mass collected when the dust is mostly fibrous. It becomes a stretched state. Therefore, the amount of dust collection is smaller than the volume of the dust collection case, and a large dust collection case is mounted, which goes against the trend of reducing the size and weight of the vacuum cleaner.

  An object of the present invention is to provide an electric vacuum cleaner in which a dust compression function is provided and a dust collection capacity is increased while taking advantage of the characteristics of the cyclone system.

  In order to achieve the above object, according to the first invention of the present application, air containing dust sucked from a suction tool by suction air generated by an electric blower is guided to a dust collecting case, and the dust is separated from the air by centrifugation and collected. In the dust vacuum cleaner, the dust collecting case includes a dust separation chamber for centrifugally separating dust in the air using a swirling flow, a dust storage chamber for depositing the separated dust, and a dust storage chamber for the dust storage chamber. An intake cylinder that forms an air flow path that connects to the electric blower from an approximate center through the approximate center of the dust separation chamber, and a filter that is provided on the peripheral surface of the intake cylinder that is located in the dust separation chamber. A dust compression operation unit that opens and closes the air vent is provided. When the dust separation operation unit closes the dust separation chamber of the intake cylinder and the ventilation port, the intake air is concentrated in the dust storage chamber. So dust Lightly bulky dust such as fibrous in a containment chamber is compressed drawn into the intake, the amount of compression is increased to fall to dust accommodating chamber. Therefore, every time the dust compression operation unit is operated, the volume of the dust that is bulky can be reduced, and the amount of dust accumulated in the dust storage chamber can be increased.

  In the above configuration, the dust compression operation unit is a cylindrical outer surface in which a plurality of openings corresponding to the plurality of vent holes are formed in an intake cylinder in which a plurality of vent holes are formed in a circumferential direction on a circumferential surface of the cylinder. By inserting the cylinder so as to be rotatable in the circumferential direction of the intake cylinder, the vent of the intake cylinder can be opened and closed by the rotation of the outer cylinder.

  In addition, the dust compression operation unit includes an urging unit that urges the outer cylinder in a direction in which the position of the opening of the outer cylinder coincides with the position of the vent hole of the intake cylinder, and a rotation that rotates the outer cylinder against the urging. By providing the operation means, the vent is opened by the urging means when the operation pressure to the rotation operation means is released, and after the dust compression operation, the dust collecting state can be restored by itself. it can.

  In addition, the dust compression operation part can be configured by inserting an outer cylinder into a suction cylinder having a vent on one side in the axial direction so as to be slidable in the axial direction of the suction cylinder. Is slid and moved in the axial direction of the intake cylinder, the air inlet of the intake cylinder can be closed to perform dust compression. A dust removal body is provided on the inner peripheral surface of the outer cylinder so as to contact the filter provided in the vent when the outer cylinder slides and scrape off the dust adhering to the filter so that it adheres to the filter at the start of dust compression. The dust is scraped off and the filter is cleaned.

  Further, the dust compression operation section includes an urging means for urging the outer cylinder in a direction in which the vent of the intake cylinder is opened, and a sliding operation means for sliding the outer cylinder against the urging. With this configuration, after the dust is compressed by operating the sliding operation means, the dust compression can be released by the biasing means and the normal operation can be resumed when the operation is released.

  Further, by forming the intake cylinder in the vertical direction in the usage state of the vacuum cleaner, the compressed dust can be dropped and stored in the dust storage chamber.

  Further, the second invention of the present application is an electric vacuum cleaner that guides air containing dust sucked from a suction tool to a dust collecting case by suction air generated by an electric blower and separates the dust from the air by centrifugation to collect the dust. The dust collection case includes a dust separation chamber for centrifugally separating dust in the air using a swirling flow as a swirling flow, and a dust storage chamber for accumulating the separated dust, and a substantially central portion of the dust storage chamber. From the bottom of the dust storage chamber to the intake air flow path upstream from the dust separation chamber. Since the air flow is formed from the lower side of the dust chamber to the upstream side of the dust separation chamber by the circulation channel, the dust in the dust chamber is caused by the flow to the circulation channel. Compressed and dust Volume of the storage chamber can be increased dust storage capacity without increasing the.

  In the above configuration, the dust collection case is formed in a substantially cylindrical shape, and an outlet to the circulation channel is formed on the bottom surface side of the dust chamber, so that a part of the swirl flow along the peripheral surface of the dust chamber falls. Thus, the dust flows to the circulation path formed on the bottom surface side, so that the dust is attracted to the bottom surface side and the compression proceeds with the accumulation of the dust.

  The circulation channel can be formed as an internal space of a handle formed in the dust collection case, and the dust collection case can be removed from the main body of the vacuum cleaner by holding the handle for discarding the dust and cleaning it. However, if a space is formed in the handle and the space is used as a circulation channel, the circulation channel can be formed without increasing the size of the dust collecting case.

  Further, the third invention of the present application includes a dust collecting case for storing dust, and the dust collecting case includes a filter located in an air flow path connected to the electric blower, and a dust removing body for scraping off dust adhering to the filter. And a dust compressing operation section. The dust removing body scrapes off dust adhering to the filter during the dust compressing operation, and the filter can be cleaned.

  As described above, according to the first invention of the present application, light and bulky dust such as fiber can be compressed with suction force by intake air by switching operation to make intake to the intake cylinder only dust storage chamber. It is possible to prevent a reduction in the dust collection force due to the dust storage volume of the dust storage chamber being occupied by bulky dust.

  In addition, according to the second invention of the present application, a circulation channel that sucks a part of air from the bottom surface side of the dust chamber can be formed, and dust can be compressed by the flow of air to the circulation channel. The amount of dust contained in the dust chamber can be increased.

  Further, according to the third invention of the present application, the dust attached to the filter is scraped off by the dust removing body during the dust compression operation, and the filter can be cleaned.

  Hereinafter, reference examples and embodiments of the present invention will be described with reference to the accompanying drawings to provide an understanding of the present invention. The following embodiment is an example embodying the present invention, and does not limit the technical scope of the present invention.

  The following reference example and each of the first and second embodiments are configured as a floor moving type vacuum cleaner 1 as shown in FIG. 1, and an extension in which a suction tool 3 is detachably attached to the tip. The tube 2 is connected to the hand handle 4, and the hose 6 extending from the hand handle 4 is connected to the cleaner body 7 by a hose joint 5. This vacuum cleaner 1 is configured as a cyclone type vacuum cleaner 1, and an extension pipe 2, which contains air containing dust sucked from the suction tool 3 by intake air generated by an electric blower built in the cleaner body 7, The dust collection case 11 (the dust collection case 12 in the configuration of the first embodiment and the dust collection case 13 in the configuration of the second embodiment) is guided through the hand handle 4, the hose 6 and the hose joint 5 to the dust collection case 11 ( 12 and 13), the dust is centrifugally separated from the air and collected in the dust collecting case 11 (12 and 13). The dust collecting case 11 (12, 13) can be taken out of the main body of the vacuum cleaner with a handle 9 provided on the dust collecting case 11 (12, 13). The dust collecting case 11 (12, 13) can be easily cleaned by throwing away accumulated dust.

  The present invention is characterized in that it has a function of compressing dust collected in the dust collection case 11, and a reference example having different compression structures and first and second embodiments will be described below. To do. In the following description, the vertical direction or the horizontal direction indicates the direction when the vacuum cleaner 1 is placed on the floor surface in use as shown in FIG.

(Reference example)
FIG. 2 shows a dust collection case 11 according to a reference example related to the present invention and its configuration, and is detachably attached to the front side of the main body case 60. The dust collection case 11 flows from the dust separation chamber 15, and a dust separation chamber 15 that separates dust from the air by centrifugal force generated by a swirling flow formed by passing air containing the sucked dust through the guide passage 14. A dust storage chamber 16 that stores dust, an intake cylinder 25 that sucks the air in the dust storage chamber 16 from substantially above the center and flows into the intake passage 26 together with the air of the dust separation chamber 15, and the intake cylinder 25 The brush bristles (dust removers) are arranged on the inner peripheral surface so as to be in contact with the filter 21 provided in the opening formed in the axial direction of the side peripheral surface of the intake cylinder 25. ) 22 is attached to the outer cylinder 17, and the lower end of the outer cylinder 17 is integrally formed to partition the dust separation chamber 15 and the dust storage chamber 16 and move the outer cylinder 17 in the axial direction. A compression plate that moves forward and backward in the dust chamber 16 It is constituted by a 8.

  The hose joint 5 is connected to the intake port 20 formed in the main body case 60, and when the electric blower 61 disposed in the main body case 60 is driven, the air containing dust sucked from the suction tool 3. Flows into the dust separation chamber 15 from the intake port 20. FIG. 3 shows a horizontal section of the dust separation chamber 15, and the air flowing in by the guide channel 14 is guided in the tangential direction of the substantially cylindrical dust separation chamber 15 and the channel cross-sectional area is narrowed. The flow velocity increases, and a high-speed swirling flow flows along the downwardly inclined flow path along the inner peripheral surface of the dust separation chamber 15. The dust in the air is separated by centrifugal separation, and from the inlet 27 together with some air. It flows into the dust chamber 16. The air in the central portion of the swirling flow in the dust separation chamber 15 is almost free of dust, but fine dust is filtered through the second filter 24 and sucked into the electric blower 61 from the intake passage 26. .

  Of the dust that has flowed into the dust storage chamber 16 formed in a substantially cylindrical shape along the inner peripheral wall surface, dust such as sand dust having a large mass gathers around the bottom surface of the dust storage chamber 16 and cotton dust having a small mass. The dust such as dust swirls with the swirling air flow and accumulates on the bottom of the dust storage chamber 16 when the operation of the electric vacuum cleaner 1 is stopped. Since a suction force toward the intake cylinder 25 is acting substantially above the center of the dust storage chamber 16, the air in the dust storage chamber 16 is attracted to the center from the bottom side where the swirling flow is weakened and rises. Fine dust is filtered by the first filter 19 provided on the bottom surface of the air 25, and the air that has entered the intake cylinder 25 through the filter 21 from the dust separation chamber 15 passes through the second filter 24 from the intake cylinder 25. Then, the air is sucked into the electric blower 61 from the intake passage 26.

  As shown in FIGS. 3 and 4, the intake cylinder 25 has a plurality of openings provided with filters 21 in the axial direction of the cylindrical shape on the side peripheral surface. Since the suction cylinder 25 sucks the air in the dust separation chamber 15 from the opening provided with the filter 21, fine dust that has not been centrifuged adheres to the filter 21, but is in a position where it is difficult to remove it. . Further, among the dust accumulated in the dust chamber 16, the fibrous material accumulates in a soft and bulky state, and occupies the dust volume of the dust chamber 16, thereby reducing the amount of dust absorbed. If the volume of the dust storage chamber 16 is increased, the amount of dust absorption can be increased. However, the vacuum cleaner body 7 is increased in size, which does not meet the demand for reduction in size and weight.

  In the reference example, the outer cylinder 17 is provided concentrically with the intake cylinder 25, and the compression plate 18 is disposed integrally with the lower end thereof. The outer cylinder 17 is formed with a plurality of openings 17a so as not to impede ventilation from the dust separation chamber 15 into the intake cylinder 25, and a compression plate 18 is integrally formed at the lower end, and a handle 28 is provided. . FIG. 4 shows the dust collecting case 11 in a cross section different from the state shown in FIG. 2, and an operating lever extended outward in the diameter direction as shown in FIG. 28 is formed. Since the operation lever 28 is biased upward by the spring spring 31, the outer cylinder 17 and the compression plate 18 are in the state shown in FIG. 4 when the operation lever 28 is not pressed. Is formed at a position facing the filter 21.

  FIG. 5 shows a state in which the operation lever 28 is pressed. When the outer cylinder 17 is lowered by the pressing operation of the operation lever 28, the operation lever 28 is provided on the upper inner peripheral surface of the outer cylinder 17 so as to face the filter 21. The brush bristles 22 scrape off adhering dust by rubbing the surface of the filter 21 as the outer cylinder 17 descends. Further, the compression plate 18 integrated with the lower end of the outer cylinder 17 compresses the dust accumulated in the dust accommodating chamber 16 as the outer cylinder 17 descends. The pressing operation of the operation lever 28 can be performed at any timing when the electric blower 61 is stopped. However, if the operation is performed before the electric vacuum cleaner 1 starts cleaning, the filter 21 is cleaned and accumulated dust. In particular, the bulky fibrous dust is compressed and the excess volume of the dust storage chamber 16 is expanded, so that the vacuum cleaner 1 can be used without reducing the dust collection capability.

(First embodiment)
FIGS. 6 and 7 show the configuration of the dust collecting case 12 according to the first embodiment, which is detachably attached to the front side of the main body case 60. In addition, the same code | symbol is attached | subjected to the component which is common in the structure of a reference example, and the description is simplified.

  The dust collecting case 12 forms a swirling flow of air containing the sucked dust, and separates dust from the air. The dust collecting chamber 12 holds dust that has been centrifuged in the dust separating chamber 32. A chamber 33, an intake cylinder 34 for sucking air in the dust storage chamber 33 from substantially above the center and flowing into the intake passage 26 (see FIG. 2) together with the air in the dust separation chamber 32, and the intake cylinder 34 The outer cylinder 38 is arranged on a concentric circle so as to be movable up and down and has a dust removing body 39 attached to the peripheral edge of the lower end so as to contact a filter 36 provided on the lower end side of the intake cylinder 34.

  When the electric blower 61 is driven, the air containing the dust sucked from the suction tool 3 flows into the dust separation chamber 32. FIG. 7 shows a horizontal cross section of the dust separation chamber 32. Inflowed air is guided in the tangential direction of the substantially cylindrical dust separation chamber 32, and the flow velocity is increased by narrowing the cross-sectional area of the flow path. , And flows in a downwardly inclined channel along the inner peripheral surface of the dust separation chamber 32, dust in the air is separated by centrifugation, and the dust is collected from the inlet 42 together with a part of the air from the inlet 42. 33 flows into. The air in the central portion of the swirling flow is filtered by a filter 36 provided on the lower side of the intake cylinder 34 and is sucked into the electric blower 61 through the intake passage 26.

  Dust that flows in along with the inner peripheral wall surface from the dust separation chamber 32 into the dust storage chamber 33 together with a part of the air is stored in the dust storage chamber 33. Since a suction force toward the intake cylinder 34 is acting substantially above the center of the dust storage chamber 33, the air in the dust storage chamber 33 is attracted to the center from the bottom side where the speed of the swirl flow is weakened and rises. Dust is filtered through the first filter 35 provided at the inlet to the inlet 34 and enters the intake cylinder 34, and passes through the second filter 37 together with the air in the dust separation chamber 32 from the intake passage 26 to the electric blower 61. Sucked.

  The intake cylinder 34 sucks the air in the dust separation chamber 32 from the opening provided with the filter 36 on the lower side of the side peripheral surface, so that fine dust adheres to the filter 36, but it is difficult to remove it. In position. Further, among the dust accumulated in the dust storage chamber 33, the fibrous material is softly accumulated in a bulky state and occupies the dust storage volume of the dust storage chamber 33, so that the amount of dust absorption is reduced. If the volume of the dust storage chamber 33 is increased, the amount of dust absorption can be increased. However, the vacuum cleaner body 7 is increased in size, which does not meet the demand for reduction in size and weight.

  In order to solve the above-described problem, an outer cylinder 38 is disposed above a concentric circle with the intake cylinder 34 so as to be vertically movable. The outer cylinder 38 is provided with a dust remover 39 whose tip is in contact with the filter 36 at the lower end, and an operation lever 40 is formed on one side peripheral surface so as to extend outward in the diameter direction. Since the operation lever 40 is urged upward by the spring spring 41, the outer cylinder 38 is in the state shown in FIG. 6 when the operation lever 40 is not pressed.

  FIG. 8 shows a state in which the operating lever 40 is pressed. When the outer cylinder 38 is lowered by the pressing operation of the operating lever 40, the dust removing body 39 removes dust attached to the surface of the filter 36 by the lowering operation. The body 39 is scraped off and the filter 36 is cleaned. When the outer cylinder 38 is lowered to the lower end of the intake cylinder 34, the surface of the filter 36 of the intake cylinder 34 is closed, so that intake from the dust separation chamber 32 to the intake cylinder 34 is stopped. Accordingly, the intake air from the intake cylinder 34 is concentrated in the dust storage chamber 33, and all the air in the dust separation chamber 32 also flows into the dust storage chamber 33, so that the suction force from the dust storage chamber 33 to the intake cylinder 34 increases rapidly. Of the dust collected in the dust storage chamber 33, fibrous dust is light and fluffy, so if the suction force to the intake cylinder 34 increases rapidly, it is sucked under the first filter 35 as shown in the figure. , Fibrous dust collects and is compressed.

  When the pressure on the operation lever 40 is released, the operation lever 40 is pushed up by the bias of the spring spring 41 and the outer cylinder 38 is raised, so that the surface of the filter 36 of the intake cylinder 34 is opened and returns to the state shown in FIG. To do. In this state, intake air from the dust separation chamber 32 to the intake cylinder 34 is generated, so the amount of intake air from the dust storage chamber 33 to the intake cylinder 34 is reduced, and the compressed dust is adsorbed under the first filter 35. Since the suction force is reduced, the compressed dust falls and is combined with other dust on the bottom surface of the dust storage chamber 33, and the entire dust volume is reduced by the compression.

  The pressing operation of the operation lever 40 can be performed at an arbitrary timing when the electric blower 61 is driven. However, if the operation is performed before the electric vacuum cleaner 1 starts cleaning, the filter 36 is cleaned and accumulated dust is removed. Since the surplus volume of the dust storage chamber 33 is expanded by compression, the vacuum cleaner 1 can be used in a state where the dust collection capacity is not lowered.

  A structure as shown in FIG. 9 can be applied to the configuration in which the dust in the dust chamber 33 is compressed by opening and closing the state in which the air in the dust separation chamber 32 is sucked from the intake cylinder 34 as described above. .

  In FIG. 9, a cylindrical intake cylinder 44 has a plurality of ventilation holes 44 a arranged in the circumferential direction on the side peripheral surface thereof, and filters (not shown) arranged in the axial direction. An outer cylinder 45 is arranged so as to be able to rotate on the outer peripheral surface. A plurality of openings 45 a are formed in the outer cylinder 45 so as to correspond to the vent holes 44 a, and an operation lever 46 is formed on one side peripheral surface so as to extend in the diameter direction. It is biased in the circumferential direction.

  In the state where the operation lever 46 is not operated, as shown in FIG. 9A, the positions of the vent 44 a of the intake cylinder 44 and the opening 45 a of the outer cylinder 45 coincide with each other and the dust separation chamber 32. The air inside is taken into the intake cylinder 44 through the opening 45a and the vent 44a. As shown in FIG. 9B, when the operation lever 46 is pressed, the outer cylinder 45 is rotated to close the vent hole 44a of the intake cylinder 44 at a portion where the opening 45a is not formed. In this state, the air in the dust separation chamber 32 is not sucked into the suction cylinder 44, and only the dust storage chamber 33 is sucked into the suction cylinder 44. As shown in FIG. The light and bulky dust is sucked into the lower surface of the first filter 35 and compressed. Therefore, when the operation lever 46 is pressed with the vacuum cleaner 1 in operation, the bulky dust in the dust chamber 33 is compressed and the surplus volume of the dust chamber 33 is expanded, so that the dust collection capacity does not decrease. The vacuum cleaner 1 can be used in a state.

(Second Embodiment)
FIG. 10 shows the configuration of the dust collecting case 13 and its peripheral part according to the second embodiment, which is detachably attached to the front side of the main body case 60. In addition, the same code | symbol is attached | subjected to the component which is common in the structure of a reference example and 1st each embodiment, and the description is simplified.

  The dust collecting case 13 is configured to form a swirling flow of air containing the sucked dust and to separate the dust from the air, and the swirling flow from the dust separating chamber 50 flows in and is centrifuged. A dust storage chamber 51 for storing the dust, and a circulation channel 52 for circulating air by returning the air sucked from the bottom surface side of the dust storage chamber 51 to the inlet of the dust separation chamber 50.

  When the electric blower 61 is driven, the air containing the dust sucked from the suction tool 3 flows into the dust separation chamber 50 from the air inlet 20. The inflowing air is guided in the tangential direction of the substantially cylindrical dust separation chamber 50 by the guide channel 14 and the flow rate is increased by narrowing the cross-sectional area of the channel, resulting in a high-speed swirling flow. The dust flows in the downwardly inclined flow path along the inner peripheral surface, the dust in the air is centrifuged, and the separated dust flows into the dust storage chamber 51 together with a part of the air.

  Dust that has flowed into the dust storage chamber 51 formed in a substantially cylindrical shape along the inner peripheral wall surface accumulates from the periphery of the bottom surface of the dust storage chamber 51, and the air flows from the bottom side where the swirl flow is weakened. The fine dust is filtered by the first filter 53 and is sucked into the electric blower 61 through the second filter 55 together with the air in the dust separation chamber 50 from the intake passage 26.

  Among the dust accumulated in the dust storage chamber 51, the fibrous material is softly accumulated in a bulky state and occupies the dust storage volume of the dust storage chamber 51, so that the amount of dust absorption is reduced. If the volume of the dust storage chamber 51 is increased, the amount of dust absorption can be increased. However, the vacuum cleaner body 7 is increased in size, which does not meet the demand for reduction in size and weight.

  In order to solve this problem, a circulation channel 52 that forms an air channel between the bottom surface side of the dust storage chamber 51 and the inlet of the dust separation chamber 50 is provided. A circulation air hole 54 provided with a filter (not shown) is formed on the bottom surface side of the dust storage chamber 51, and a part of the air in the dust storage chamber 51 flows from the circulation air hole 54 to the circulation flow path 52. Since the entrance of the dust separation chamber 50 forms a high-speed swirl flow as described above by the guide passage 14, the air in the circulation passage 52 that opens to the entrance is drawn into the dust separation chamber 50 by the negative pressure. As a result, part of the air circulates.

  When a part of the air flows out from the bottom surface side of the dust storage chamber 51, the dust accumulated on the bottom surface is deposited on the flow of the flowing out air, accumulated in a compressed state, and accumulated as a result of the compression. The amount decreases.

  In the configuration shown in FIG. 11, the circulation channel 56 is formed in the handle 9 of the dust collecting case 13a. The handle 9 is formed in a hollow structure, and a circulation air hole 57 provided in the bottom surface of the dust storage chamber 51 communicates with a circulation channel 56 using the hollow part of the handle 9, and the circulation channel 56 is an inlet of the dust separation chamber 50. To form an air flow path as shown in the figure.

  In the dust storage chamber 51, dust having a large mass is blown and accumulated around the bottom by centrifugal force due to the swirling flow, and dust having a small mass such as fiber rotates with the swirling flow. The weakened bottom side tends to gather near the center, and if there is intake air from the circulating air hole 57 at that position, the accumulation amount increases more and the compression proceeds with the intake air.

  The present invention relates to a vacuum cleaner that is widely spread and frequently used every day. In addition to satisfying industrial applicability, the dust storage chamber is occupied by bulky dust such as fiber. It can prevent the amount of dust absorption from decreasing compared to the volume.

The perspective view which shows the whole structure of the vacuum cleaner which concerns on a reference example and embodiment. Sectional drawing which shows the structure of the dust collection case which concerns on a reference example. Sectional drawing which shows the structure of the dust separation chamber and intake cylinder which concern on a reference example. Sectional drawing which shows the structure of the compression board and outer cylinder which concern on a reference example. Sectional drawing which shows the state which lowered | hung the compression plate and outer cylinder same as the above. Sectional drawing which shows the structure of the dust collection case which concerns on 1st Embodiment. Sectional drawing which shows the structure of the outer cylinder and intake cylinder which concern on 1st Embodiment. Sectional drawing which shows the state which lowered | hung the outer cylinder same as the above. Sectional drawing which shows the modification of an intake cylinder and an outer cylinder in 1st Embodiment. Sectional drawing which shows the structure of the dust collection case which concerns on 2nd Embodiment. Sectional drawing which shows the modification of the circulation flow path in 2nd Embodiment. The fragmentary sectional view of the vacuum cleaner which concerns on a prior art. Sectional drawing which shows the structure of the dust separation chamber which concerns on a prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vacuum cleaner 9 Handle 11, 12, 13 Dust collection case 15, 32, 50 Dust separation chamber 16, 33, 51 Dust storage chamber 17, 38 Outer cylinder 18 Compression plate 21, 36 Filter 22 Brush hair (dust removal body)
25, 34 Intake cylinder 26 Intake passage 39 Dust removal body 52, 56 Circulation passage 54, 57 Circulation air hole

Claims (11)

In a vacuum cleaner that draws air containing dust sucked from a suction tool by a suction air generated by an electric blower to a dust collecting case and separates dust from the air by centrifugation,
The dust collection case includes a dust separation chamber for centrifugally separating dust in the air by using a swirling flow as a swirl flow, a dust storage chamber for accumulating the separated dust, and the dust separation from a substantially central portion of the dust storage chamber. Dust that opens and closes a vent formed by providing a filter on a circumferential surface located in the dust separation chamber of the intake cylinder and forming an air flow path that connects to the electric blower through a substantially central portion of the chamber A vacuum cleaner comprising a compression operation unit. The dust compression operation unit includes an intake cylinder in which a plurality of ventilation holes are formed in a circumferential direction on a circumferential surface of a cylinder, and a cylindrical outer cylinder in which a plurality of openings corresponding to the plurality of ventilation holes are formed. The electric vacuum cleaner according to claim 1, wherein the vacuum cleaner is inserted so as to be rotatable in the circumferential direction. The dust compression operation unit includes an urging means for urging the outer cylinder in a direction in which the position of the opening of the outer cylinder coincides with the position of the vent of the intake cylinder, and a rotation operation for rotating the outer cylinder against the urging. The vacuum cleaner according to claim 2, further comprising means. 2. The electric cleaning according to claim 1, wherein the dust compression operation section is inserted into an intake cylinder having a vent hole formed on one side in the axial direction so that the outer cylinder is slidable in the axial direction of the intake cylinder. Machine. The vacuum cleaner according to claim 4, wherein a dust removing body is provided on an inner peripheral surface of the outer cylinder so as to scrape dust adhering to the filter in contact with the filter provided in the vent when the outer cylinder slides. . The dust compression operation section includes an urging means for urging the outer cylinder in a direction in which the vent of the intake cylinder is opened, and a sliding operation means for sliding the outer cylinder against the urging. Item 6. The vacuum cleaner according to Item 4 or 5. The vacuum cleaner as described in any one of Claims 4-6 formed so that the axial center direction of an intake pipe may become a perpendicular direction in the use condition of the said vacuum cleaner. In a vacuum cleaner that draws air containing dust sucked from a suction tool by a suction air generated by an electric blower to a dust collecting case and separates dust from the air by centrifugation,
The dust collection case includes a dust separation chamber for centrifugally separating dust in the air by using a swirling flow as a swirl flow, and a dust storage chamber for accumulating the separated dust. An air flow path connected to the electric blower through a substantially central portion of the dust separation chamber is formed, and a circulation flow path is formed from the bottom side of the dust storage chamber to the intake flow path upstream of the dust separation chamber. A vacuum cleaner characterized by The vacuum cleaner according to claim 8, wherein the dust collecting case is formed in a substantially cylindrical shape, and an outlet to the circulation channel is formed on the bottom surface side of the dust storage chamber. The electric vacuum cleaner according to claim 8 or 9, wherein the circulation channel is formed as an internal space of a handle formed in the dust collecting case. A dust collecting case for storing dust is provided, and the dust collecting case includes a filter located in an air flow path connected to the electric blower, and a dust compression operation unit having a dust removing body for scraping off dust adhering to the filter. A vacuum cleaner characterized by

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