JP4256368B2 - Electric vacuum cleaner - Google Patents

Description

  The present invention relates to an electric vacuum cleaner that separates dust in a dust-containing airflow sucked by a negative pressure of an electric blower by using a first dust separating means and a filter disposed on the downstream side thereof.

  Conventionally, the dust in the dust-containing airflow sucked by the negative pressure of the electric blower is separated by the first dust separating means by the inertial force of the dust, and the separated dust is collected in the first dust collecting part, Furthermore, a second dust separating means comprising a pleated filter or the like is disposed downstream of the first dust separating means, and the dust that has passed through the first dust separating means is separated by filtration by the second dust separating means, and the dust dropping means. A technique is known in which fine dust dropped from the second dust separation means is collected in a second dust collection portion provided below the second dust separation means (see, for example, Patent Document 1).

In this technique, the second dust collecting part is formed on the lower side of the lower part of the frame of the second dust separating means, and the lower part of the frame is protruded toward the rear wall of the first dust collecting part. A gap is formed between the lower part of the body and the rear wall of the first dust collecting part, and dust dropped by the dust dropping means is collected in the second dust collecting part through the gap. Due to the gap, the dust collected in the second dust collecting part is prevented from rising due to the negative suction pressure of the electric blower and reattaching to the pleated filter of the second dust separating means.
Japanese Patent No. 3490081 (Claims, paragraphs 0009-0060, FIGS. 1 to 16)

  In the technique of Patent Document 1, the negative pressure chamber in which the air that has passed through the first dust separation means and the air that has passed through the first dust separation section merge to reach the second dust separation means, and the second dust collection section include The second dust separation means communicates with a gap formed between the lower part of the frame body and the rear wall of the first dust collecting part.

  Even if this gap is narrow, every time the operation of the electric blower is started, it cannot be denied that the second dust collecting part is somewhat affected by the airflow flowing through the negative pressure chamber. Therefore, there is a possibility that the dust accumulated in the second dust collecting part is sucked up through the gap and reattached to the upstream side surface of the pleated filter of the second dust separating means. Therefore, it is required to consider such a situation.

  An object of the present invention is to prevent dust that has been dropped from a filter disposed on the downstream side of the first dust separating means and accumulated in the second dust collecting part from reattaching to the filter during operation of the electric blower. It is to provide a vacuum cleaner.

The present invention, have a filter surrounding walls fine dust outlet is provided, and the dust-separation case in which the filter enclosing wall has a cylindrical portion, the separated dust in the dust-containing air and the air 1 dust separating means, a first dust collecting part for storing the dust separated by this means, a filter for separating the dust that has passed through the first dust separating means from the air by filtration, and a rotatable dust carrier are provided. And a dust removing means for dropping the dust trapped in the filter, and an opening / closing member that opens and closes the fine dust outlet and closes the fine dust outlet when the electric blower is in operation, and the dust carrier has a cylindrical shape with a filter surrounding wall And has a dust pushing part that passes through the communicating part between the fine dust outlet and the inside of the filter surrounding wall during sliding, and the filter surrounding wall is provided from the filter by the dust removing means. the inner surface of the cylindrical portion The dust that has been dropped is pushed and moved by the dust carrier when the electric blower is stopped, and the fine dust that has passed through this fine dust outlet is independent of the dust that is contained in the first dust collecting part. And a second dust collecting part for continuously accommodating the first dust collecting part.

  According to the present invention, it is possible to prevent the dust that has been dropped from the filter disposed on the downstream side of the first dust separating means and accumulated in the second dust collecting section from reattaching to the filter during the operation of the electric blower. Can provide a vacuum cleaner.

  An embodiment of the present invention will be described with reference to FIGS.

  Reference numeral 1 in FIG. 1 indicates a canister type vacuum cleaner, for example. The vacuum cleaner 1 includes a cleaner body 2 and a suction passage member 3 connected thereto. The cleaner body 2 can travel on the floor surface, which is the surface to be cleaned, by wheels or the like that it has. In the front part of the cleaner body 2, for example, a connection port 2 a opened on the front surface is provided. An electric blower 4 is accommodated in the rear part of the cleaner body 2. The electric blower 4 is arranged with its intake port 4a facing forward.

  The suction passage member 3 that guides dust-containing air to the connection port 2 a includes a dust suction hose 5, an extension pipe 6, and a suction port body 7. The dust suction hose 5 has a connecting cylinder part 5a at one end of a flexible hose body, and a hand operating part 5b at the other end of the hose body.

  The connecting cylinder 5a is plugged into the connecting port 2a. An operation panel 8 provided with operation buttons is attached to the handle portion 5c of the hand operation portion 5b. Various operation commands including on / off control of the electric blower 4 are given to the control device 9 built in the cleaner body 2 by the operation panel 8. The extension pipe 6 is a telescopic type, for example, an upstream pipe 6a and a downstream pipe 6b that are slidably fitted, and the downstream pipe 6b is detachably fitted to the hand operating portion 5b. . The suction port body 7 is detachably fitted to the upstream pipe 6a.

  A dust separation device 11 is disposed on the upstream side of the electric blower 4, for example, at a portion between the connection port 2 a of the cleaner body 2 and the electric blower 4. The dust separation device 11 includes a separation device body 12 and a dust collection case 13.

  The dust collection case 13 is detachably attached to the separation device main body 12 by an insertion / removal operation from above the front portion of the cleaner main body 2. 2-5, the code | symbol 13g has shown the handle for insertion / extraction operation provided in the upper surface of the dust collection case 13, and this handle 13g is abbreviate | omitted in FIG.

  As shown in FIG. 5, the dust collection case 13 has a dust movement space 13a extending in the width direction of the cleaner body 2, a first dust collection portion 13b, and a second dust collection portion 13c. The first dust collecting portion 13b is continuously provided downward from the dust moving space 13a. The second dust collecting portion 13c is provided adjacent to the first dust collecting portion 13b, for example, below the first dust collecting portion 13b. The first dust collecting portion 13b and the second dust collecting portion 13c are independent from each other by the partition wall 13d of the dust collecting case 13.

  As shown in FIG. 10, a dust inlet 18 is opened on the rear wall of the second dust collecting portion 13c, and an opening / closing member such as a lid 19 is attached. The lid 19 rotates around the pivot 19a inside the second dust collecting portion 13c to open and close the dust inlet 18, thereby opening and closing a fine dust outlet 35 described later. The lid 19 is biased in the opening direction by a biasing member such as a spring (not shown) so as to close the dust inlet 18 when the electric blower 4 is in operation and close the dust inlet 18 when the electric blower 4 is stopped. . Reference numeral 19b denotes a stopper portion that limits the opening angle of the lid 19.

  The dust collection case 13 has a case lid 15 that opens and closes the first dust collection portion 13b and the second dust collection portion 13c for dust disposal. The case lid 15 is disposed over the first dust collecting portion 13b and the second dust collecting portion 13c in the closed state. The case lid 15 can be rotated around a hinge 16 (see FIG. 3) at its lower end. The closed state of the case lid 15 is held by holding the upper edge of the case lid 15 with the holding member 17. The holding member 17 can move over a position where the upper edge of the case lid 15 is not pressed and a position where it is pressed in conjunction with manual operation of the operating member 14 (see FIG. 5).

  A rotation unit 45 shown in FIG. 8 and a unit driving device 61 shown in FIGS. 2 and 6 are attached to the dust separation case 21 provided in the separation device main body 12.

The dust separation case 21 to which the negative pressure of the electric blower 4 reaches is formed by connecting the first case member 22 and the second case member 41 as shown in FIGS. The first case member 22 is provided with an airflow inlet 23 (see FIGS. 2 to 4) protruding forward. This airflow inlet 23 is connected to the connection port 2 a of the cleaner body 2.

  As shown in FIGS. 4 and 5, the first case member 22 has a first dust separation that separates dust in the dust-containing air sucked by the electric blower 4 from air using, for example, the inertia force of the dust. Means 20 are provided. The first dust separation means 20 includes an intake cylinder 24 and a cylindrical guide wall 25 provided so as to surround the periphery, and a primary separation chamber 26 is formed therebetween.

  For example, the intake cylinder 24 having a truncated cone shape extends in the width direction of the cleaner body 2 and the dust separation case 21, and the tapered one end thereof forms a part of the first case member 22 to form the primary separation chamber. 26 is closed by a transparent member 21a that enables visual recognition of the inside. The back wall 27 that faces the transparent member 21a and partitions the primary separation chamber 26 is formed of a spiral wall that gradually approaches the transparent member 21a. A separation chamber inlet (not shown) is formed between a portion of the back wall 27 that is farthest from the transparent member 21 a and a portion that is close to the transparent member 21 a, and the separation chamber inlet communicates with the air flow inlet 23.

  The first case member 22 is provided with, for example, an upward separation chamber outlet 25a (see FIGS. 2 and 3). The intake cylinder 24 is provided with an intake portion, for example, a mesh member 24a that communicates with the inside and outside of the intake tube 24. The first case member 22 has a wall portion 28 that forms an airflow passage port 29 (see FIGS. 4 and 5) communicating with the inside of the intake cylinder 24. The airflow passage port 29 is opened toward the second case member 41 so as to face an upstream side surface (surface) of a filter element 49 described later.

  A vent window 27 a with a mesh member that communicates the air flow passage port 29 and the primary separation chamber 26 is provided in a part of the back wall 27. The first case member 22 is provided with a vent 30 as shown in FIG. 5 on the side opposite to the intake cylinder 24 with the airflow passage 29 as a boundary. The vent 30 communicates with the airflow passage 29.

  The dust collecting case 13 is attached to and detached from the outer surface of the first case member 22 so as to cover the separation chamber outlet 25 a and the vent 30. The dust collection case 13 includes a case inlet (not shown) that overlaps and communicates with the separation chamber outlet 25a, and a case vent window 13f that has a mesh member that overlaps and communicates with the vent 30 (FIG. 5 and FIG. 5). 10) is provided.

  As shown in FIG. 4, the first case member 22 has a shaft portion 31 protruding toward the second case member 41, and a dust removing member 38 is protruded from the shaft portion 31. Yes. The dust removing member 38 constitutes dust removing means. The dust removing member 38 repels the wrinkles of the filter 56 to be described later, and protrudes toward the second case member 41 in parallel with the shaft portion 31. The shaft portion 31 has a cylindrical shape and is open at the tip.

  As shown in FIG. 4 and the like, the downstream side portion of the first case member 22 expands to form a filter surrounding wall 22a. The filter surrounding wall 22 a includes a cylindrical portion 32 drawn around the shaft portion 31, a wall portion 33 that is integrally connected so as to be bent at the front end of the cylindrical portion 32, and a rearward protruding integrally from the wall portion 33. And a carrier guide wall 34 provided. The rear part of the cylindrical part 32 forms a filter guide part 32a. The carrier guide wall 34 is formed in a circular shape (see FIGS. 6 and 7) that is parallel to the cylindrical portion 32 and that has the shaft portion 31 as the center.

  As shown in FIG. 10, an outlet plate 35 a having a fine dust outlet 35 is attached to the lower portion of the wall portion 33. The outlet plate 35 a can be formed integrally with the wall portion 33. A seal packing 35b protruding from the outer surface of the outlet plate 35a is attached. The seal packing 35b has an annular shape made of rubber or the like and surrounds the fine dust outlet 35. The fine dust outlet 35 is opened at a position higher than the lower end of the filter surrounding wall 22a. By attaching the dust collecting case 13 to the separation device main body 12, the dust inlet 18 of the dust collecting case 13 overlaps the fine dust outlet 35 and the rear wall of the dust collecting case 13 is kept in close contact with the seal packing 35b. It has come to be.

  As shown in FIGS. 6 and 7, a discharge groove 36 opened upward is provided on the lower outer side of the filter surrounding wall 22a. The discharge groove 36 communicates with the inside of the filter surrounding wall 22a. This communication portion is located higher than the fine dust outlet 35. The discharge groove 36 has a chute shape and is inclined forward and downward, and the lower end of the inclination is continuous with the lower end edge of the fine dust outlet 35 as shown in FIG.

  The second case member 41 includes a cover having the same diameter as the filter surrounding wall 22 a of the first case member 22. The first case member 22 and the second case member 41 are fitted with the connecting projections 37 and 42 radially projecting from each other (see FIG. 4) and fixed with removable screws. It is connected. The connection convex part 37 of the 1st case member 22 and the connection convex part 42 of the 2nd case member 41 remove | exclude them, and the 1st case member 22 and the 2nd case member 41 are attached to the dust separation case 21. It also functions as a spacer that allows a later-described gear to be arranged at a predetermined interval in the front-rear direction.

  As shown in FIG. 4, the second case member 41 is provided with an airflow outlet 43 protruding rearward. As shown in FIG. 7, the airflow outlet 43 is closer to the periphery than the center portion of the second case member 41. As a result, the airflow outlet 43 is provided so as to be offset from the airflow passage opening 29, not just behind it. The air flow outlet 43 is in communication with the air inlet 4 a of the electric blower 4. Inside the second case member 41, a lattice member 44 capable of circulating an airflow is mounted.

  The rotating unit 45 includes a filter 46 and a dust carrier 55 as shown in FIG.

  As shown in FIG. 9 and the like, the filter 46 includes a cylindrical wall 47, a filter frame 48, a filter element 49, a plurality of rolling elements 50 such as rollers, and a gear 51.

  The cylindrical wall 47 has a smaller diameter than the inner diameter of the filter guide portion 32a of the cylindrical portion 32, and the rolling elements 50 are attached to the outer peripheral portion of the cylindrical wall 47 at intervals along the circumferential direction. The gear 51 is integrally connected to the outer periphery of the rear edge of the cylindrical wall 47. The gear 51 is larger in diameter than the cylindrical wall 47.

  As shown in FIG. 4 and the like, the filter frame 48 is disposed inside the cylindrical wall 47 and is formed integrally with the cylindrical wall 47 so as to continue to the front edge of the cylindrical wall 47. The filter frame 48 is provided with a filter element 49 which is shaped so as to have a large number of soot by the filter frame 48 and filters and separates dust. The filter frame 48 and the filter element 49 form a so-called pleated filter portion. The pleated filter portion has a generally truncated cone shape, and the diameter gradually decreases toward the front side (upstream side). The front end portion of the filter frame 48 is closed, and a bearing hole 48a that opens to the front side is formed at the center thereof.

  The filter 46 fits the bearing hole 48a to the shaft portion 31 and rotates the rolling element 50 around the shaft portion 31 along the filter guide portion 32a with the rolling element 50 in contact with the inner peripheral surface of the filter guide portion 32a. Supported as possible. By this incorporation, the filter 46 is disposed with the ridges of the filter element 49 inclined. The gear 51 of the filter 46 is exposed to the outside of the dust separation case 21 through the gap between the first case member 22 and the second case member 41. An annular hermetic seal member 52 to 54 made of rubber or the like is sandwiched between the filter 46 and the first case member 22 and the second case member 41 to ensure airtightness.

  As described above, the filter 46 incorporated in the rear part of the dust separation case 21 forms the upstream chamber A between the filter surrounding wall 22a of the first case member 22 and the second case member 41. A downstream chamber B is formed therebetween. The airflow passage port 29 facing the upstream chamber A faces the surface (upstream side surface) of the pleated filter portion, and the airflow outlet 43 facing the downstream chamber B faces the back surface (downstream side surface) of the pleated filter portion. The dust removing member 38 is located in the upstream chamber A, and the rear end portion of the dust removing member 38 can repel the soot located on the outer peripheral portion of the pleated filter portion when the filter 46 is rotated. , Provided so as to intersect with the rotation trajectory of the ridge located in the outer peripheral portion.

  As shown in FIGS. 6 to 8, the dust carrier 55 includes a ring portion 56, a plurality of connecting portions 57, and a plurality of dust pushing portions 58.

  The ring portion 56 is rotatably fitted to the outer periphery of the carrier guide wall 34 (see FIG. 4). As shown in FIG. 8 and the like, the connecting portion 57 projects integrally from the ring portion 56 toward the cylindrical wall 47 with its outer surface flush with the outer peripheral surface of the ring portion 56. These connecting portions 57 have connecting ribs 57a. The dust carrier 55 is connected to the filter 46 by inserting the tip ends of the connecting ribs 57 a into the cylindrical wall 47.

  As shown in FIG. 8 and the like, the dust pushing portion 58 forms a blade shape extending over the connecting portion 57 and the ring portion 56, and protrudes integrally with the outer surfaces of the connecting portion 57 and the ring portion 56 in an oblique shape. The front end 58 a of the dust pushing portion 58 is flush with the front end of the ring portion 56. The front end 58a and the front end of the ring portion 56 are in sliding contact with the inner surface of the wall portion 33 of the filter surrounding wall 22a. The side edge 58 b of the dust pushing portion 58 is in sliding contact with the inner peripheral surface of the cylindrical portion 32. The rear end portion 58c of the dust pushing portion 58 is bent. The rear end portion 58 c prevents fine dust pushed and moved by the dust pushing portion 58 from being scooped up from the inner peripheral surface of the cylindrical portion 32 from spilling to the rear of the dust pushing portion 58. The dust carrier 55 is rotated together with the filter 46 with the rear end portion 58c of the dust pushing portion 58 positioned on the downstream side in the rotation direction and the front end 58a positioned on the upstream side in the rotation direction.

  As shown in FIG. 6, the unit driving device 61 is fixed to the output shaft of the stepping motor 62 and an electric motor, such as a stepping motor 62, which is capable of controlling the rotation angle, which is fixed to the second case member 41 of the dust separation case 21. Drive gear 63. The drive gear 63 has a smaller diameter than the gear 51 of the filter 46 and is engaged with the gear 51. Therefore, as the stepping motor 62 is operated, the rotating unit 45 including the filter 46 and the dust carrier 55 is affected by the frictional resistance of the airtight seal members 52 to 54 and the frictional resistance of the filter surrounding wall 22a and the dust carrier 55. It is turned against.

  The control device 9 has various electrical components mounted on the circuit board, and controls the overall operation of the electric blower 4 and the like according to the operation command input from the operation panel 8. This control device 9 is used when the operation of the electric blower 4 is interrupted for a predetermined time or more by a command from the operation panel 8 during the cleaning operation, or when the operation of the electric blower 4 is stopped and the cleaning is finished. The driving device 61 is driven to control its operation so that automatic dust removal is performed. In this case, the driving of the unit driving device 61 is controlled so that the rotating unit 45 having the filter 46 is rotated one or more times.

  By operating the electric blower 4 of the vacuum cleaner 1, air containing dust on the floor surface is sucked into the connection port 2 a of the cleaner body 2 through the suction passage member 3. While this dust-containing air passes through the dust separator 11, the dust-separating action by the inertia separation in the first dust separation means 20 and the filtration separation in the filter 46 disposed on the downstream side of the first dust separation means 20. Subject to dust separation. The air thus dust-separated in two stages flows out of the air flow outlet 43 and flows through the electric blower 4 and is discharged to the outside of the cleaner body 2.

  Dust separation by inertial separation in the first dust separation means 20 is performed as follows. That is, the dust-containing air that has passed through the connection port 2a flows from the airflow inlet 23 into the primary separation chamber 26 through the separation chamber inlet. At this time, the dust-containing air flowing along the inner wall 27 of the primary separation chamber 26 swirls in the primary separation chamber 26, and accordingly, the dust having a large mass such as coarse dust is caused by the centrifugal force acting on the dust. While being moved toward the guide wall 25 and being moved along the guide wall 25, it flows out into the dust moving space 13 a of the dust collecting case 13 through the separation chamber outlet 25 a and a case inlet (not shown) overlapping therewith. On the other hand, since a small amount of cotton dust or a part of air is sucked into the intake cylinder 24 through the mesh member 24a of the intake cylinder 24, the dust and air having a large mass are separated.

  The air sucked inside the intake cylinder 24 flows toward the airflow passage port 29. A part of the air flowing into the primary separation chamber 26 and passing through the ventilation window 27a joins this air flow. Furthermore, the air sucked from the inside of the dust collecting case 13 through the case ventilation window 13f and the ventilation hole 30 overlapping therewith also joins the airflow directed toward the airflow passage port 29. The air in the dust collection case 13 is sucked into the airflow passage port 29 in this way, so that the movement of dust having a large mass, such as coarse dust, in the dust movement space 13a is promoted. It moves to the 1st dust collection part 13b and is stored.

  And the filtration separation with the filter 46 of the rotation unit 45 is made as follows. The air that has joined and reached the airflow passage port 29 as described above is blown out from the airflow passage port 29, passes through the filter element 49 of the filter 46, and is filtered. Thereby, fine dust such as cotton dust contained in the air to be passed is captured by the filter element 49. The air that has been purified by passing through the filter element 49 flows out through the airflow outlet 43 as described above, and is sucked into the electric blower 4.

  In the above cleaning, since the negative pressure stronger than the primary separation chamber 26 is acting on the upstream side chamber A on the front side of the filter 46, the fine dust outlet 35 is closed as shown in FIG. It is held in the state. Therefore, the airflow in the primary separation chamber 26 is not sucked into the upstream chamber A, and the above-described cyclonic inertia separation action is not impaired.

  When the cleaning operation is interrupted for a predetermined time or immediately after the cleaning operation is completed, the unit driving device 61 is operated by the control device 9 for a predetermined time, and automatic dust removal of the filter 46 is performed as follows.

  In this case, since a predetermined number of drive pulses are applied to the stepping motor 62, the rotation unit 45 is rotated through meshing between the drive gear 63 and the gear 51 of the filter 46. As a result, the filter 46 is rotated, so that each time the soot on the outer peripheral side of the filter element 49 of the filter 46 passes through the dust removing member 38, the soot is repelled by the dust removing member 38. Accordingly, fine dust trapped mainly on the surface of the filter element 49 is separated. The separated fine dust falls on the lower inner surface of the cylindrical portion 32 of the filter surrounding wall 22a.

  During the above automatic dust removal, the dust carrier 55 is rotated integrally with the filter 46. The ring portion 56 of the dust carrier 55 and the carrier guide wall 34 into which the ring portion 56 is slidably fitted have a narrow width in the front-rear direction, and the front end portion of the filter 46 as shown in FIG. It is arrange | positioned so that it may surround. For this reason, it is negligibly small that the fine dust from the filter 46 falls on the lower inner surface of the cylindrical portion 32 by the carrier guide wall 34 and the ring portion 56.

  As the dust carrier 55 is rotated (this rotation is counterclockwise in FIGS. 6 to 8), the dust pushing portion 58 moves between the inner peripheral surface of the cylindrical portion 32 and the inner surface of the peripheral portion of the wall portion 33. Slide these surfaces to rub. Thereby, the dust pushing part 58 pushes and moves so that the fine dust which fell on the lower inner surface of the cylindrical part 32 may be scraped off.

  Along with the rotation of the dust carrier 55, the dust pushing portion 58 passes through the upper open portion of the discharge groove 36 with the rear end portion 58c facing upward and the front end 58a inclined downward (see FIG. 7). At that time, the fine dust already collected on the dust pushing portion 58 is directed to the discharge groove 36 by its own weight and directed obliquely forward, so that the fine dust is further discharged by the inclination of the discharge groove 36. Slide down to 35. In this case, each time the dust removing member 38 repels the filter 46 due to the above automatic dust removal, the vibration accompanying it reaches the first case member 22, so that the fine dust toward the fine dust outlet 35 along the discharge groove 36. The sliding down is made smoothly.

  Since the electric blower 4 is in a stopped state during the above automatic dust removal, the lid 19 that opens and closes the dust inlet 18 connected to the fine dust outlet 35 is separated from the dust inlet 18 by the biasing force of the biasing member. Thus, the fine dust outlet 35 is maintained in an open state. Therefore, the fine dust dropped from the filter 46 passes through the fine dust outlet 35 and the dust inlet 18 and falls to the second dust collecting portion 13c of the dust collecting case 13 and is stored. That is, the fine dust dropped from the filter 46 by the automatic dust removal can be transferred and stored in the second dust collecting portion 13c independent of the upstream chamber A in the dust separation case 21 in which the filter 46 is accommodated. .

  The filter surrounding wall 22a of the dust separation case 21 in which the filter 46 is accommodated is not a dust collecting part. Since the dust collecting part has the dust collecting case 13 detachably attached to the outer surface of the dust separating case 21, this dust collecting part is isolated from the dust separating case 21 in a place different from the filter surrounding wall 22a. Has been. Under such conditions, fine dust trapped by the filter 46 is dropped by the dust removing member 38 onto the inner bottom portion of the filter surrounding wall 22a. Nevertheless, as described above, the fine dust dropped from the filter 45 to the inner bottom portion of the filter surrounding wall 22a by automatic dust dropping is forcibly moved from the filter surrounding wall 22a by the dust carrier 55, and collected. The dust can be discharged to the second dust collecting portion 13c of the dust case 13. Therefore, fine dust dropped from the filter 45 does not accumulate in the filter surrounding wall 22a.

  When the interrupted cleaning is resumed and when cleaning is started again, the negative suction pressure of the electric blower 4 works on the upstream chamber A, and sucks the lid 19 through the fine dust outlet 35 and the dust inlet 18. Negative pressure reaches. For this reason, the intake negative pressure overcomes the urging force for opening the lid 19 and the lid 19 is pulled. Thereby, the dust inlet 18 and the fine dust outlet 35 are closed by the lid 19. In this state, the second dust collecting portion 13c is independent of the airflow passing through the dust separation case 21 and is not completely affected by the airflow. Therefore, fine dust accumulated in the second dust collecting portion 13 c is not drawn into the upstream chamber A and reattached to the upstream side surface of the filter 46.

  For this reason, in cleaning after dust removal, the degree of clogging of the filter element 49 of the filter 46 is low, and the dust absorption performance is good. Furthermore, since there is no reattachment of the fine dust that has fallen, the degree of progress of the clogged state until the next dust removal is slow. Thereby, it is not necessary to rotate the filter 46 excessively, and the dust removal of the filter 46 is sufficiently performed with a small number of rotations. Therefore, it is possible to improve the durability of the filter 46 dusted by the dust removing member 38.

  The fine dust collected in the second dust collecting part 13c of the dust collecting case 13 can be discarded together with mainly coarse dust collected in the first dust collecting part 13b with the case lid 15 opened. Therefore, it is not necessary to individually dispose the dust in the first dust collecting portion 13b and the dust in the second dust collecting portion 13c, which is preferable in handling the dust.

  Since the dust carrier 55 is rotated, compared to the case where the dust carrier 55 is moved back and forth to push the fine dust, there is no waste in operation of returning the dust carrier and the dust carrier 55 is smoothly moved. This is preferable in that it can be operated. Furthermore, the dust carrier 55 to be rotated can be provided with a plurality of dust pushing portions 58. In this case, the fine dust dropped on the lower inner surface of the filter surrounding wall 22a can be pushed and moved a plurality of times each time the dust carrier 55 is rotated, and the dropped fine dust can be reliably collected by the second dust collection. It can be made to transfer to the part 13c. In addition, there is no inconvenience that fine dust is pushed back by the returned dust carrier as in the case where the dust carrier 55 is moved back and forth to move the fine dust, and in consideration of this point, a plurality of fine dust outlets are provided. There is no need to complicate.

  Since the dust carrier 55 is connected to the filter 46 that is rotated when dust is dropped, at the same time as dust is dropped, the dust carrier 55 is moved to transfer the fine dust dropped from the filter 46 to the second dust collecting portion 13c. it can. Accordingly, it is not necessary to separately perform dust dropping on the filter 46 and transferring the fine dust that has been dropped to the second dust collecting portion 13c, which is preferable in handling.

  Furthermore, since the lid 19 for opening and closing the fine dust outlet 35 is closed using intake negative pressure, an operating means for closing the lid 19 in the operating state of the electric blower 4 is unnecessary. This is preferable because it is simple in construction.

  The present invention is not limited to the one embodiment. For example, the first dust separation means may separate air and dust by filtration. Further, as the dust removing means for dropping the dust captured by the filter, it is possible to adopt a means for giving vibration to the filter by a vibrator or the like. Further, the filter disposed on the downstream side of the first dust separation means may not be a pleated type.

  When the filter is a pleated type, a dust removing member (dust removing means) that repels the filter is provided on the downstream side of the filter, for example, the second case member, and the filter is repelled from the inner peripheral side as the filter rotates, for example. It may be provided so as to remove dust by giving a dust removal operation. The number of dust removing members that repel the filter is not limited to one, but a plurality of dust removing members can be provided at intervals in the circumferential direction of the filter. Further, whether the dust removing member is disposed on the outer peripheral side or the inner peripheral side of the filter, the dust may be removed by, for example, repelling the filter frame without the dust removing member coming into contact with the filter element. In this case, it is preferable in that the risk of damaging the filter element due to repeated contact with the dust removing member can be avoided. Further, the direction of the filter is not limited, and the filter may have a disk shape whose ridges are provided radially.

The dust carrier may be operated separately from the dust removing operation of the filter . Further, the dust pushing portion of the dust carrier may be formed by brush hairs planted over the ring portion and the connecting portion, or may be formed by a rubber-like elastic member attached over the ring portion and the connecting portion. Thus, when forming a dust pushing part with a soft member, it is preferable at the point which can suppress abrasion of this dust pushing part and a filter surrounding wall.

  Further, the second dust collecting part can be provided separately from the first dust collecting part. The opening / closing member is not limited to the lid.

The perspective view which shows the vacuum cleaner of one Embodiment of this invention. The perspective view which shows the dust separation apparatus with which the vacuum cleaner of FIG. The front view which shows the dust separation apparatus with which the vacuum cleaner of FIG. The vertical side view which shows the dust separation apparatus of FIG. 2 in the state which abbreviate | omitted the filter element. The perspective view which cuts and shows the dust separation apparatus of FIG. 2 in the position which passes the 1st dust separation means. The perspective view which cuts and shows the dust separation apparatus of FIG. 2 in the position which passes the dust carrier. The front view which cuts and shows the dust separation apparatus of FIG. 2 in the position which passes the dust carrier. The perspective view which shows the rotation unit with which the dust separation apparatus of FIG. 2 is provided. The perspective view which shows the filter with which the rotation unit of FIG. 8 is provided. The perspective view which cuts and shows the dust separation apparatus of FIG. 2 in the position which passes the dust collection case and a fine dust exit.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Vacuum cleaner, 2 ... Vacuum cleaner main body, 4 ... Electric blower, 4a ... Intake port, 11 ... Dust separator, 12 ... Separator main body, 13 ... Dust collection case, 13b ... First dust collection part, 13c ... 2nd dust collecting part, 13d ... partition, 18 ... dust inlet, 19 ... lid (opening / closing member), 20 ... first dust separating means, 21 ... dust separating case, 22 ... first case member, 22a ... filter surrounding wall 32 ... Cylindrical part, 32a ... Filter guide part, 33 ... Wall part, 34 ... Carrier guide wall, 35 ... Fine dust outlet, 36 ... Discharge groove, 38 ... Dust removal member (dust removal means), 41 ... Second Case member, 45 ... Rotating unit, 46 ... Filter, 48 ... Filter frame, 49 ... Filter element, 51 ... Gear, 55 ... Dust carrier, 56 ... Ring part, 57 ... Connection part, 58 ... Dust pushing part, 61 ... Unit Drive device, 62 ... Stepping motor , 63 ... drive gear

Claims (4)

A dust-separation case to communicate with the air inlet of the electric blower and the filter enclosing wall has a cylindrical portion and having a filter surrounding walls fine dust outlet is provided,
A first dust separating means provided in the dust separating case and separating dust in the dust-containing air sucked by the electric blower;
A first dust collecting part for storing the dust separated by the first dust separating means;
A filter disposed on the downstream side of the first dust separation means and provided in the dust separation case for separating dust that has passed through the first dust separation means from air by filtration;
Dust removing means for dropping the dust trapped on the filter;
The filter surrounding wall has a dust pushing portion that slides on the inner peripheral surface of the cylindrical portion and passes through the communicating portion between the fine dust outlet and the inside of the filter surrounding wall when sliding. Dust is rotatably provided in a dust separation case, and dust dropped from the filter onto the inner surface of the cylindrical portion of the filter surrounding wall by the dust removing means is stopped by the dust pushing portion when the electric blower is stopped. A dust carrier to be pushed and discharged from the fine dust outlet;
An opening and closing member that opens and closes the fine dust outlet and closes in the operating state of the electric blower,
A second dust collecting part that is provided continuously to the fine dust outlet, and that contains fine dust that has passed through the fine dust outlet independently of the dust contained in the first dust collecting part;
Vacuum cleaner equipped with. The vacuum cleaner according to claim 1 , further comprising a biasing member that biases the opening / closing member in an opening direction when the electric blower is stopped, while the dust opening / closing member is closed by a negative pressure generated by the operation of the electric blower. Machine. The vacuum cleaner according to claim 1 or 2, wherein the filter is rotated when dust is dropped, and the dust carrier is connected to the filter so that the filter and the dust carrier are rotated together. .   The dust collection case detachably attached to the dust separation case is provided, and the first dust collection portion and the second dust collection portion are provided independently of each other by a partition wall in the dust collection case. The vacuum cleaner as described in any one of the inside.

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