JP4982175B2 - Dust collector and vacuum cleaner - Google Patents

Description

  The present invention relates to a dust collecting apparatus having a centrifugal separator that rotates dust sucked together with air and centrifuges dust from the air, and a vacuum cleaner including the dust collecting apparatus.

Conventionally, this type of vacuum cleaner includes a vacuum cleaner body that houses an electric blower. In this vacuum cleaner main body, a dust collector communicating with the suction side of the electric blower is disposed, and this dust collector is arranged at the upper part of the cup-shaped main body section that divides the dust collector inside. Is provided. This dust separation part is provided with a suction port for sucking dust together with air at the front part, and a centrifugal separation part having a substantially circular shape in plan view is formed continuously with the suction opening, and a ventilation hole is provided above the centrifugal separation part. It has been. The vent is provided with a filter, and the vent communicates with the dust collecting portion through the inside of the lid with the lid closed (see, for example, Patent Document 1). .
Japanese Patent Laying-Open No. 2004-267636 (page 4-5, FIG. 4)

  However, in the above-described electric vacuum cleaner, since the air passage from the suction port to the suction side of the electric blower is refracted in a complicated manner, the air passage resistance increases, and all the sucked air passes through the filter and the electric blower. Since the air is sucked into the filter, the filter is likely to be clogged, and there is a problem that it is not easy to improve the suction efficiency.

  This invention is made | formed in view of such a point, and it aims at providing the vacuum cleaner which improved suction efficiency, separating a dust reliably in a centrifuge part.

The present invention is provided with a suction port for sucking dust together with air, swirling the dust sucked from the suction port together with air, and a centrifugal separation unit that centrifuges the dust from the air, and is located below the centrifugal separation unit, A dust collecting unit that collects the dust separated by the centrifugal separation unit, and a centrifugal separation unit and a dust collecting unit that are located between the centrifugal separation unit and the dust collection unit and at the downstream end. a partition wall portion having a first communication port for communicating, projecting into the dust collecting portion at a position including at least the top portion of the downstream side of the partition wall, a side wall which partitions a portion of the outer periphery of the centrifuging unit Part, the 2nd communication port provided in this side wall part, and the filter provided in this 2nd communication port.

According to the present invention, separately from the first communication port for communicating the centrifugation unit and the dust collecting portion provided in the partition wall, and the projecting distal to the dust collecting portion at a position including a top portion of the downstream side of the partition wall A second communication port is provided in the side wall portion that defines a part of the outer peripheral edge of the separation unit, and a filter is provided in the second communication port, so that the air sucked into the centrifugal separation unit is collected together with dust from the first communication port. Since it is separated into a part that flows into the dust collecting part and a part that passes through the filter from the second communication port without containing most of the dust, it is possible to prevent the reduction of the suction work rate while reliably separating the dust from the air. .

  The configuration of an embodiment of the present invention will be described below with reference to FIGS.

  4 to 6, reference numeral 1 denotes a vacuum cleaner main body. The vacuum cleaner main body 1 includes a main body case 3 that houses an electric blower 2 and a vertical direction in which a rear portion is pivotally supported by the main body case 3. A lid 4 that can be opened and closed, and a dust collecting container 5 as a dust collecting device that is located on the upstream side of the electric blower 2 and can be attached to and detached from the main body case 3, and sucked together with the suction air generated by driving the electric blower 2 This is a so-called cyclonic vacuum cleaner that collects dust by centrifugal separation in a dust collecting container 5, and can travel on the floor as a surface to be cleaned.

  The main body case 3 accommodates a cord reel 7 around a power cord (not shown) that enables power supply from a commercial AC power source (not shown) to the electric blower 2 and the like below the electric blower 2. A dish-shaped placement portion 8 is provided at the front portion of the main body case 3. The mounting portion 8 is a portion on which the dust collecting container 5 is detachably mounted, and when the lid 4 is closed, the dust collecting container 5 can be sandwiched and fixed between the lid 4.

  The lid 4 is provided with a tube portion 11 at the front portion, the front portion which is the tip portion of the tube portion 11 becomes a hose connection port 12 for sucking air, and the rear portion which is the base end portion of the tube portion 11 is A connection opening 13 communicates with the suction side of the dust collecting container 5 fixed to the mounting portion 8.

  The hose connection port 12 is connected to the base end portion of an elongated substantially cylindrical dust collection hose 15 that is flexible and bendable. At the tip of the dust collecting hose 15, a hand operating unit 16 capable of selecting the operation mode of the electric blower 2 is provided. The hand operating section 16 is provided with a gripping section 17 that is gripped by an operator, and the gripping section 17 is provided with a plurality of operation switches 18 for setting the electric blower 2 and the like to a plurality of operation modes. .

  In addition, a telescopic elongated cylindrical extension tube 21 is detachably connected to the distal end of the hand operation unit 16. Further, the extension pipe 21 is detachably connected to a suction port body 22 that is placed on, for example, a carpet on the floor of the room and is a floor brush that sucks dust on the carpet. Yes.

  As shown in FIGS. 1 to 3, the dust collecting container 5 includes a dust collecting container main body 25 as an apparatus main body, and a substantially circular suction port 26 is formed at the front end portion of the dust collecting container main body 25. An air passage forming body 27 having a substantially circular shape in plan view at the center of the dust collector is detachably provided, and a bottom lid 28 serving as a dust collector lid is pivotally supported at the bottom of the dust collecting container body 25 so as to be openable and closable. In the dust collecting container 5, a centrifugal separation unit 31 that is a cyclone separation unit as a separation unit is defined between the dust collection container main body 25 and the air passage forming body 27, and below the centrifugal separation unit 31 and In the dust container main body 25, a dust collecting part 32 and a negative pressure chamber part 33 as a first dust collecting part for collecting coarse dust, which is part of the dust separated by the centrifugal separator 31, are partitioned. A pleated filter part 34 as a second dust collecting part that collects fine dust that is the remainder of the dust separated by the centrifugal separator 31 is detachably provided behind the dust collecting part 32, and the pleated filter Below the part 34, a fine dust collecting part 35 is formed as a third dust collecting part in which fine dust removed from the pleated filter part 34 is accommodated.

  The dust collecting container body 25 includes a wall portion 36 that forms an outer shell extending from the front portion to both side portions of the dust collecting vessel 5, and an upper wall as an inclined wall portion that blocks the upper portion of the wall portion 36 and continues in an inclined manner. And a partition wall 38 as a partition wall portion provided continuously inside the wall portion 36 below the upper wall portion 37.

  A grip 41 for gripping the dust collecting container 5 is provided at the front of the wall 36. Further, the lower end portion of the wall portion 36 is a waste opening 42 that communicates with the lower portions of the dust collection portion 32 and the fine dust collection portion 35 and can be opened and closed by the bottom lid 28. The disposal opening 42 allows the dust contained in the dust collection unit 32 and the fine dust collection unit 35 to be discarded outside the dust collection container 5.

  The upper wall portion 37 forms the bottom surface of the centrifugal separation portion 31, and is formed to be inclined downward toward the front side. The upper wall portion 37 includes a circular portion 43 as a partition wall portion having a circular shape in plan view formed along the outer shape of the air passage forming body 27, and a side wall portion 44 continuous to the rear portion of the circular portion 43. Is formed.

  The circular portion 43 is formed with a circular vent opening 45 in a substantially central portion, and an inflow surface portion 46 that faces the suction port 26 is formed in front of the vent opening 45. An inclined portion 47 that is inclined so that the peripheral edge side is lower than the ventilation opening 45 side is formed in the clockwise direction shown in FIG. 1 of the ventilation opening 45, and the end portion of the inclined portion 47 opposite to the inflow surface portion 46 is formed. A communication opening 48 as a first communication port is formed on the right side shown in FIG.

  The ventilation opening 45 is provided with a dust separator 51 as a first dust separator. The dust separator 51 includes a frame 52 formed in a truncated cylindrical shape, and a net filter 53 as a first dust separator provided in an opening 52a of the frame 52. The centrifugal separator 31 and the negative pressure chamber 33 are communicated with each other through the opening 52a and the vent opening 45.

  The inflow surface portion 46 is formed along the inclination of the entire upper wall portion 37, and is formed in a substantially fan shape from the front of the circular portion 43 to the left front shown in FIG.

  The inclined portion 47 is a peripheral portion from one side portion closer to the front side of the circular portion 43 to the rear portion of the circular portion 43 and the other side portion closer to the front side of the circular portion 43 from the upper wall portion 37 to the dust collecting portion 32 side. Is formed to protrude. In addition, the inclined portion 47 has a protruding amount toward the dust collecting portion 32 from one side that is upstream of the centrifuge portion 31 to the other side that is downstream of the centrifuge portion 31. In this case, the inclination angle increases from one side to the other side.

  The communication opening 48 communicates the downstream side of the centrifuge part 31 with the dust collecting part 32 and is located at the lowest inclined end of the upper wall part 37 to constitute the downstream end part of the centrifuge part 31. In addition, the communication opening 48 includes an inclined plate 58 that protrudes upward from an end portion of the inflow surface portion 46 opposite to the inclined portion 47, that is, an end portion positioned in front of the ventilation opening 45, and an inclined surface. 1 is defined between an inlet plate (not shown) that protrudes downwardly into the dust collecting portion 32 on the right side of the ventilation opening 45 shown in FIG. ing.

  Further, the side wall portion 44 is a portion corresponding to the inclined portion 47 of the circular portion 43, that is, from one side portion closer to the front side including the top portion of the circular portion 43 forming the centrifugal separation portion 31 to the front side via the rear portion. It is continuously formed in a strip shape over the other side, and is formed so as to intersect the opening direction of the suction port 26, that is, in a plane shape along the vertical direction, and is opposed to the upstream side of the pleated filter portion 34. is doing. Therefore, the side wall portion 44 is formed so that the dimension in the vertical direction increases from one side to the other side. The side wall 44 is formed with a vent 61 as a second communication port. The vent 61 is provided with a net filter 62 as a second dust separator as a filter.

  The vent 61 communicates the centrifuge unit 31 and the negative pressure chamber unit 33, that is, the pleated filter unit 34. One side of the side wall portion 44 near the rear side of the vent opening 45 including the top of the circular portion 43. A rib 61a is formed along the vertical direction at the center portion in the left-right direction. As shown in FIG. 4, the vent 61 is located on a straight line L that connects the suction port 26 and the circular suction port 63 on the suction side of the electric blower 2 in a plan view. In other words, the inlet 26, the vent 61 and the inlet 63 are arranged in a straight line in plan view.

  The net filter 62 is provided in the entire vent 61.

  The intake port 63 is formed in a body partition wall (not shown) provided behind the mounting portion 8 of the cleaner body 1, and is one side with respect to the center in the left-right direction of the cleaner body 1 together with the electric blower 2. It is biased to.

  Returning to FIGS. 1 to 3, the partition wall 38 has an extending portion 65 extending rearward from a position slightly spaced below the upper wall portion 37. An inclined wall 66 as a first continuous wall portion extends downward from the end portion, and a lower wall portion 67 as a second continuous wall portion extends downward from a lower end portion of the inclined wall 66. ing.

  The extending portion 65 is located between the dust collecting portion 32 and the negative pressure chamber portion 33, and is formed in a slightly inclined shape downward toward the rear at a position closer to one side that does not communicate with the communication opening 48. .

  The inclined wall 66 is located between the dust collecting part 32 and the pleated filter part 34, is formed in an inclined shape so as to face the pleated filter part 34, and the downstream side of the dust collecting part 32 is connected to the negative pressure chamber. A large number of openings 71 as first communication ports communicating with the pleated filter portion 34 via the portion 33 are formed in a lattice shape, and a net filter 72 as a third dust separator is provided in each of the openings 71. .

  The lower wall portion 67 is located between the dust collecting portion 32 and the fine dust collecting portion 35, and the lower end portion abuts against the bottom cover 28, so that the dust collecting portion 32, the fine dust collecting portion 35, and Is partitioned. Further, behind the lower wall portion 67, there is provided a longitudinal rear wall portion 74 continuous across the left and right sides of the inside of the wall portion 36. On the upper portion of the rear wall portion 74, a pleat filter portion 34 is provided. A placing step portion 75 for placing the lower part of the housing is horizontally provided. A horizontally long exhaust port 81 is defined by the mounting step portion 75, both sides of the rear end portion of the wall portion 36, and the rear end portion of the upper wall portion 37. The exhaust port 81 communicates with the downstream side, which is the rear portion of the negative pressure chamber 33, and faces the intake port 63 of the electric blower 2 in a state where the dust collecting container 5 is attached to the main body case 3.

  The rear wall 74 is formed in a continuous longitudinal shape across the left and right sides inside the wall 36.

  On the other hand, in the air passage forming body 27, a substantially circular projecting tube portion 85 that forms the suction port 26 is located at the front end portion, and the rear end portion of the projecting tube portion 85 is spirally wound clockwise in a plan view. The spiral portion 86 is continuously formed, and an accommodating protrusion 87 having a circular shape in plan view is formed at the center of the spiral portion 86.

  The protruding pipe portion 85 is a portion that is airtightly connected to the downstream side of the pipe portion 11 of the lid body 4 with the dust container 5 attached to the main body case 3, and communicates with the hose connection port 12 through the connection opening 13. is there.

  The spiral portion 86 has an arc shape with a cross section protruding upward, and divides a circular air passage portion 88 as an air passage between the circular portion 43 of the upper wall portion 37 of the dust collecting container body 25. .

  The housing projecting portion 87 is formed so that the upper end portion of the frame body 52 of the dust separating portion 51 is fitted.

  The front end of the bottom cover 28 is pivotally supported on both side portions of the wall portion 36 of the dust container main body 25 so as to be rotatable. The bottom cover 28 can be opened by operating a button 89 provided on the handle 41 of the dust collecting container 5.

  The pleated filter unit 34 includes a pleated filter body 91 that is a fourth dust separator and a frame body (not shown) that holds the pleated filter body 91, and is attached so as to close the exhaust port 81.

  The pleat filter body 91 is formed such that pleat crests and pleat troughs along the vertical direction are alternately continued in the left-right direction of the vacuum cleaner main body 1, and protrudes forward from the frame body. The lower part of the front end is mounted on the mounting step portion 75 of the dust collecting container body 25 with the 34 attached to the exhaust port 81. A dust removing means 94 is provided at the rear of the pleated filter body 91.

  Here, the dust removing means 94 has a projection 95 provided so as to be reciprocally movable in the left-right direction of the cleaner body 1, and this projection 95 is shallowly engaged with a pleat peak portion of the pleated filter body 91 and reciprocates left and right. The projection 95 moves by moving over the pleat crest when moved so that the pleated filter body 91 is vibrated and the dust adhering to the pleated filter body 91 is dropped to the fine dust collecting part 35. Has been.

  The protrusion 95 is controlled so as to reciprocate for a predetermined time when the driving of the electric blower 2 is stopped, for example.

  Further, the frame body is configured such that the lower end portion is placed on the placing step portion 75 of the dust collecting container main body 25 with the pleated filter portion 34 attached to the exhaust port 81.

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

  First, the lid body 4 is rotated upward to be opened, and the dust collecting container 5 having the air passage forming body 27 attached on the upper wall portion 37 and the pleated filter portion 34 attached to the exhaust port 81 is placed on the placement portion 8. In the placed state, the lid body 4 is rotated downward, and the dust collecting container 5 is sandwiched between the lid body 4 and the placing portion 8.

  At this time, the suction port 26 of the dust collecting container 5 is hermetically connected to the connection opening 13 of the pipe part 11 of the lid 4, and the exhaust port 81 of the dust collecting container 5 and the pleats attached to the exhaust port 81. The filter unit 34 faces the intake port 63 of the electric blower 2.

  Next, the dust collecting hose 15, the extension pipe 21 and the suction port body 22 are sequentially connected to the hose connection port 12, and a power cord (not shown) is led out from the main body case 3 and connected to a commercial AC power source. The desired operation switch 18 is operated in a state where 17 is held, and the electric blower 2 is driven in a desired operation mode.

  In this state, the operator touches the suction port body 22 on the floor surface and travels forward and backward, and sucks dust on the floor surface together with air from the front end side.

  The sucked air becomes a suction air and passes from the suction port 26 of the dust collecting container 5 to the centrifugal separator 31 via the suction port body 22, the extension pipe 21, the dust collection hose 15, the hose connection port 12 and the connection opening 13. And sucked.

The suction air is a turning air W2 along with most of the dust swirling around the dust separator 51, it proceeds linearly rearward in an inclined shape from the suction port 26 via the inflow surface 46 of the circular portion 43, i.e. It is separated into straight wind W1 that goes straight.

At this time, a part of the swirling wind W2 passes through the opening 52a and flows into the negative pressure chamber 33, and during this passage, dust is collected by the net filter 53, and the remaining part is Then, along the inclined portion 47, the dust is sucked into the dust collecting portion 32 from the communication opening 48 together with most of the dust.

Of the dust contained in the swirling air W2 that has flowed into the dust collecting section 32, relatively large coarse dust falls into the dust collecting section 32 and is collected as it is, and relatively small fine dust is collected in the swirling air W2. Is collected by the net filter 72 when it flows into the negative pressure chamber 33 through the opening 71.

On the other hand, although the straight wind W1 contains almost no dust, a slight amount of dust is collected by the net filter 62 when passing through the vent 61 of the side wall 44.

Then, the swirl wind W2 passes through the pleated filter body 91 of the pleated filter section 34 via the negative pressure chamber section 33, and at the time of this passage, the pleated filter body 91 is captured by the net filters 53 and 62. Fine dust that was not collected is collected.

Similarly, the straight wind W1 passes through the pleated filter body 91 of the pleated filter section 34 as it is, and during this passage, fine dust that has not been collected by the net filter 62 is collected in the pleated filter body 91. The

Both the swirling wind W2 and the straight wind W1 that have passed through the pleated filter body 91 are exhausted from the exhaust port 81 to the outside of the dust collecting container 5, and then sucked into the electric blower 2 from the intake port 63. Exhaust air passes through 2 and is exhausted to the outside of the cleaner body 1 through an exhaust hole (not shown) formed in the body case 3.

  When the cleaning is finished and the operator operates the operation switch 18 to stop the driving of the electric blower 2, the protrusion 95 of the dust removing means 94 attached to the pleated filter portion 34 reciprocates in the left-right direction. The fine dust with the projection 95 attached to the pleated filter body 91 is dropped from the pleated filter body 91 to the fine dust collecting portion 35.

  Thereafter, the operator opens the cover 4 by rotating the cover 4 upward, removes the dust collecting container 5 from the main body case 3, and then opens the bottom cover 28 by pressing a button 89 on a trash can, for example. From the disposal opening 42, the dust in the dust collecting unit 32 and the dust in the fine dust collecting unit 35 are discarded.

  Further, the air path forming body 27 is removed from the dust collecting container body 25, and the net filters 53, 62 and the like are cleaned.

  And after returning the air path formation body 27 and the bottom cover 28 to the original state, they are attached to the main body case 3 again and used.

  As described above, in the above-described embodiment, the position including the top on the downstream side of the circular portion 43 separately from the communication opening 48 provided in the circular portion 43 and communicating the centrifugal separation portion 31 and the dust collecting portion 32. In addition, a vent 61 is provided in the side wall 44 projecting toward the dust collecting part 32, and a net filter 62 is provided in the vent 61.

Thus, suction air sucked through the inlet 26 into the centrifugal separator unit 31, the turning air W2 sucked into the communication opening 48 to pivot along the circumferential air passage 88 together with the dust, almost vent free of dust Separated into straight wind W1 exiting to 61.

As a result, the turning air by W2, it is possible to collect the dust collection unit 32 dust and reliably centrifuged by centrifugation unit 31, the turning air W2 independently straight wind W1 and the intake port 63 of the electric blower 2 Since it is sucked in, it is possible to prevent a reduction in suction work rate.

That is, since the straight wind W1 contains almost no dust, since the net filter 62 is hard to clog, since the air path resistance is large hardly flow rate of straight wind W1 side is less likely to decrease, the straight air W1 electric By being sucked into the blower 2, it is possible to prevent a reduction in suction efficiency.

Further, when the vent 61 is formed at a position near the upstream of the centrifugal separator 31, for example, most of the suction air sucked from the suction port 26 becomes the straight air W1, and dust in the centrifugal separator 31 When the vent 61 is formed, for example, at a position closer to the downstream side of the centrifugal separator 31, the straight wind W1 is not formed, so at least the downstream side of the circular portion 43 is not formed. By forming the vent hole 61 in the side wall part 44 provided at the position including the top part, the air volume of the swirling wind W2 and the straight running wind W1 can be set with a good balance.

  Further, since the air vent 61 is formed on the straight line L connecting the air inlet 26 and the air inlet 63 in a plan view, the air sucked from the air inlet 26 goes straight as it is to the air inlet 63 through the air vent 61. It is easy to be sucked in, and a decrease in suction efficiency can be prevented more effectively.

Then, the inclined portion 47 of the circular portion 43 that is continuous with the side wall portion 44 is inclined so that the peripheral edge side is lower than the ventilation opening 45 side, so that dust contained in the swirling air W2 is removed from the peripheral edge portion of the inclined portion 47. And the inclination angle of the inclined portion 47 is larger on the downstream side than the upstream side of the centrifugal separator 31, so that the air passage area of the circulating air passage portion 88 is more downstream than the upstream side. Since it becomes larger, the air volume of the swirling air W2 can be secured up to the communication opening 48, and the dust separation efficiency in the centrifugal separator 31 can be further improved.

In the above-described embodiment, at least a portion of the inclined portion 47 corresponding to the vent hole 61 is linearly continuous to the vent hole 61 without tilting the peripheral edge side downward from the vent opening 45 side. You may form so that it may do. In this case, since the air volume of the straight wind W1 that goes straight along the inclined portion 47 is increased, the suction efficiency can be further improved.

  Moreover, the detail of the dust collecting container 5 is not limited to the said structure.

  Furthermore, the details of the vacuum cleaner are not limited to the above configuration, and the vacuum cleaner is not limited to the canister type, for example, self-propelled (running assist type) or autonomous running type (robot type) electric A vacuum cleaner or the like may be used, and for example, an upright type or a handy type in which the suction port 22 is directly formed on the lower surface of the vacuum cleaner body 1 can be used.

It is a longitudinal cross-sectional view which shows the vacuum cleaner provided with the dust collector of one embodiment of this invention. It is sectional drawing which shows operation | movement of the principal part of a dust collector same as the above. It is a perspective view which shows the principal part of a dust collector same as the above from back. It is a longitudinal cross-sectional view which shows the vacuum cleaner provided with the dust collector same as the above. It is a perspective view which shows the vacuum cleaner main body of a vacuum cleaner same as the above. It is a perspective view which shows a vacuum cleaner same as the above.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vacuum cleaner main body 2 Electric blower 5 Dust collection container as a dust collector
26 Suction port
31 Centrifuge
32 Dust collector
43 Circular part as bulkhead
44 Side wall
48 Communication opening as the first communication port
61 Vent as second communication port
62 Net filter as filter

Claims (3)

A centrifuge unit that has a suction port for sucking dust together with air, rotates the dust sucked from the suction port together with air, and centrifuges the dust from the air;
A dust collecting unit that is located below the centrifugal separator and collects the dust separated by the centrifugal separator,
A partition wall portion located between the centrifugal separation portion and the dust collection portion, and having a first communication port communicating with the centrifugal separation portion and the dust collection portion at the downstream end,
The partition wall portion projecting into the dust collecting portion at a position including at least the top portion of the downstream side of a side wall portion which partitions a portion of the outer periphery of the centrifugal separator unit,
A second communication port provided in the side wall,
And a filter provided at the second communication port. The dust collector according to claim 1, wherein the second communication port is located on a straight line connecting the suction port and the suction side of the electric blower in a plan view. A vacuum cleaner body containing an electric blower,
A vacuum cleaner comprising: the dust collecting device according to claim 1, wherein a downstream side communicates with a suction side of the electric blower.

Images