JP7247806B2 - Cleaner - Google Patents

Description

The present invention relates to improvements in cyclone-type cleaners, and aims to improve dust separation performance while achieving a reduction in size and weight.

A cyclone cleaner sucks air mixed with dust from the suction port in the tangential direction from the outer circumference of the cylindrical swirl chamber by the air flow generated by the rotation of the motor, creating a strong swirl flow in the swirl chamber. to centrifuge the dust contained in the air. The dust separated by the swirling flow collides with the inner side of the outer wall of the outer cylinder, falls along the outer wall inner surface, and moves to the dust collection chamber side. Air separated from dust in the vicinity of the axis of the swirl chamber is discharged axially through the exhaust tube (inner tube), thereby enabling continuous dust collection by centrifugal force. As such a cyclone-type cleaner, the technique disclosed in Patent Document 1 is known. In Patent Literature 1, intake air is directed tangentially into a swirl chamber to generate a tornado-like swirl flow in the swirl chamber. The swirling chamber is provided with an exhaust pipe that communicates between the outer side and the inner side in the axial direction, and sucks air from an opening surface provided on a part of the outer peripheral surface of the exhaust pipe.

In such a cyclone type cleaner, in order to further improve the dust collection performance, a cleaner having a two-stage cyclone section has been put to practical use. The configuration in which the cyclone unit section is provided in two stages has a first cyclone section and a second cyclone section provided downstream of the first cyclone section, and pressure loss is suppressed as the number of cylinders in the second cyclone section increases. , the suction power and separation performance are improved. In addition, the first cyclone section and the second cyclone section are configured separately from the cleaner main body so that they can be separated, thereby facilitating the work of removing dust accumulated in the cyclone unit and maintenance.

International publication WO2019/065085

In conventional cyclone cleaners, in order to prevent dust from rising above the dust guard, a dust guard is provided at the bottom of the inner cylinder that spreads out like an umbrella in the radial direction and accumulates in the dust collection chamber. It is designed to prevent the dust from returning to the swirling chamber by suppressing the rising of the dust. However, when the dust guard is provided, the flow path cross-sectional area of the air from the swirl chamber on the outer peripheral side of the inner cylinder to the dust collection chamber decreases, so the flow rate decreases and the rotational force of the air in the dust collection chamber weakens. . In addition, as the dust accumulates, the flow of air from the swirl chamber to the dust collection chamber is further reduced, which may reduce the dust collection effect.

SUMMARY OF THE INVENTION The present invention has been made in view of the above background, and an object thereof is to provide a cleaner with improved performance by improving the structure of the inner cylindrical portion of the cyclone unit.
Another object of the present invention is to provide a cleaner with improved compressive force and suction power by applying negative pressure to a wider area on the bottom side than the enlarged diameter portion of the inner cylinder.
Still another object of the present invention is to compress the dust accumulated in the dust collecting chamber by sucking air from the bottom side of the diameter-expanded portion that is expanded like an umbrella so that the accumulated dust can be suppressed from rising up. It is to provide a cleaner that has

The typical features of the invention disclosed in the present application are as follows.
According to one aspect of the present invention, a body housing having a motor, a fan driven by the motor, and an air intake port which accommodates the motor and the fan inside and into which the airflow generated by the fan enters; an outer cylinder that can be attached to the main body housing so as to cover it and that has a cylindrical shape and forms a swirling chamber; a cyclone unit having an intake port provided in a side wall of the chamber for communicating the inside and the outside and for directing the airflow entering the inside of the swirling chamber in a circumferential direction around the central axis of the inner cylinder. The outer cylinder has a dust collection chamber adjacent to the swirl chamber on the opposite side of the intake port in the central axis direction, and the inner cylinder has a cylindrical portion extending in the central axis direction and open at both ends, and a cylindrical portion that is continuous with the cylindrical portion. It is arranged on the side opposite to the intake port of the cylinder and closer to the intake port than the dust collection chamber. It is configured to have an enlarged diameter portion having a large outer diameter and a straightening portion provided inside the enlarged diameter portion in a radial direction about the central axis and extending in the central axis direction. Inside the outer cylinder, a swirl chamber where the inner cylinder is located and a dust collection chamber provided adjacent to the swirl chamber on the side opposite to the intake port in the central axis direction and for collecting dust are defined. The diameter-enlarging portion has an umbrella-like shape, and is arranged so that the opening face faces the dust-collecting chamber, and the diameter of the bottom opening of the diameter-enlarging portion is larger than the inner diameter of the cylindrical portion.

According to another feature of the present invention, a mesh filter is provided at the central axial end of the enlarged diameter portion. Further, an outer rectifying plate is provided extending from the end of the enlarged diameter portion toward the dust collection chamber, and the width of the outer rectifying plate in the width direction orthogonal to the central axis is the outer diameter of the enlarged diameter portion in the radial direction. It is formed to be smaller than the diameter . This outer current plate extends parallel to the central axis. Further, the rectifying section is provided with a duplicate rectifying plate, and among the rectifying plates, the rectifying plate including the central axis is connected to the outer rectifying plate to act as an integrated rectifying means.

According to still another feature of the present invention, an air passing portion communicating radially from the outer peripheral side to the inner peripheral side is formed in a portion of the cylindrical outer peripheral surface of the inner cylinder, and the filter is provided in the air passing portion. placed. In addition, the inner wall of the opening of the outer cylinder facing the dust collection chamber is provided with guide ribs protruding radially inward, and the guide ribs direct the swirling airflow toward the central axis. Further, recesses formed along the guide ribs are provided on the outer wall of the dust collection chamber of the outer cylinder. The upper end diameter (D1) of the dust collection chamber is configured to be larger than the outer diameter (D2) of the portion of the outer cylinder that is located at the same position in the axial direction as the lower end of the expanded diameter portion.

According to still another feature of the present invention, the cyclone unit rotates the air sucked from the nozzle and flowing in from the suction port about the first axis to centrifuge the dust, and then exhausts it to the outside. It has one cyclone section and a plurality of second cyclone sections for centrifugally separating dust by rotating the air discharged from the first cyclone section about a second axis and then discharging the air to the outside. The plurality of second cyclone sections are arranged to line up in the circumferential direction outside the swirl chamber of the first cyclone section, and are positioned in at least one of the body housings in the first axial direction and in the radial direction of the first axis. It is provided so as to overlap with the part.

According to the present invention, in the inner cylindrical portion of the first cyclone chamber, the end portion on the side opposite to the discharge port (the end portion on the side closer to the dust collection chamber) is provided with the enlarged diameter portion, and the bottom portion of the enlarged diameter portion is for air flow. Since the inflow opening and the filter are provided, air can be sucked in the axial direction from the bottom opening of the enlarged portion, and a negative pressure can be applied to a wide area on the bottom side of the enlarged portion. As a result, the dust in the dust collection chamber can be compressed to effectively suppress the rising of dust. In addition, since the airflow rotating on the outer edge side near the bottom surface of the dust collection chamber is rectified and discharged toward the bottom opening of the enlarged part via the vicinity of the center of the bottom surface, the airflow rotating in the swirl chamber However, it becomes easier to reach the bottom of the dust collection chamber, and it is possible to reduce fluid loss.

It is a side view of cleaner 1 concerning an example of the present invention. FIG. 2 is a longitudinal sectional view of the cleaner 1 of FIG. 1; Fig. 2 is a perspective view of the cyclone unit 50 of Fig. 1 in a detached state; FIG. 4 is a longitudinal sectional view of the cyclone unit 50 of FIG. 3; FIG. 5 is a cross-sectional view taken along line AA of FIG. 4; FIG. 5 is a side view of the first inner cylinder unit 80 of FIG. 4; 7 is a perspective view of the first inner cylinder unit 80 of FIG. 6. FIG. 7 is a bottom view of the first inner cylinder unit 80 of FIG. 6. FIG. Fig. 2 is a side view of the cyclone unit 50 of Fig. 1 in a detached state; FIG. 10 is a vertical cross-sectional view of the dust collection case 51 of FIG. 9 in a detached state; FIG. 11 is a cross-sectional view of the BB portion of FIG. 10; 11 is a cross-sectional view of the CC portion of FIG. 10; FIG. FIG. 5 is a vertical cross-sectional view of a cyclone unit 50A according to a second embodiment of the invention; FIG. 14 is a perspective view of the first inner cylinder unit 80A of FIG. 13; FIG. 11 is a perspective view of a removed state of a cyclone unit 50A according to a second embodiment of the present invention;

Embodiments of the present invention will be described below with reference to the drawings. In the following figures, the same parts are denoted by the same reference numerals, and repeated descriptions are omitted. Further, in this specification, the front, back, left, right, and up and down directions are described as the directions shown in the drawings.

FIG. 1 is a side view of a cyclone type cleaner 1 according to an embodiment of the present invention. FIG. 1 shows only the main body of the cleaner 1, and the extension pipe 48 connected to the pipe mounting port 36 of the main body is shown at the rear end side. Illustration of a nozzle or a suction head attached to the is omitted. The cleaner 1 is an electric working device that is used by an operator to collect dust while holding a handle 4 with one hand. . The housing 2 accommodates a motor and a fan which will be described later, and includes a substantially cylindrical motor accommodating portion 2a, a battery mounting portion 2c for mounting the battery pack 100, a handle portion 4, and a pipe mounting port 36. is connected to the upper portion of the fan 17 and forms a passage for air discharged from a fan 17 (described later in FIG. 2). The housing 2 is manufactured in multi-part form by integral molding of synthetic resin. An upper portion of the rear end of the housing 2 is formed with a hollow through portion 4c through which four fingers from the index finger to the little finger of the operator can be sufficiently passed. The operator grasps either the horizontally extending portion (horizontal portion 4b) on the upper side of the handle portion 4 or the portion extending obliquely in the rear vertical direction (inclined portion 4a) while sucking dust. It can be carried out. Above the handle portion 4, a switch panel 40 is provided on which a motor rotation switch (not shown) is arranged.

A battery mounting portion 2c is connected to the lower portion of the handle portion 4 of the housing 2, and the battery pack 100 is mounted thereon. A battery pack 100 widely used in electric power tools is used, and a plurality of battery cells are housed inside a case to supply, for example, DC power of 18V or more to a motor 15 (see FIG. 2), which will be described later. The battery cells (not shown) inside the battery pack 100 are rechargeable lithium ion battery cells, but the type and voltage of the battery pack 100 can be arbitrarily selected. The battery pack 100 can be attached by sliding it forward in parallel with the axis A1 of the housing 2. By pressing the latch button 101, the battery pack 100 can be slid backward along the axis A1 of the motor from the state shown in FIG. can be removed with

A cylindrical cyclone unit 50 is attached to the front side of the motor accommodating portion 2a of the housing 2. As shown in FIG. The cyclone unit 50 is configured to be detachable from the rear housing 2 on the separation plane indicated by the arrow in the drawing (the vertical plane extending in the vertical and horizontal directions). A latch button 54 (see also FIG. 2) for fixing or removing is provided on the front upper side of the cyclone unit 50, and a latching claw 78 (described later in FIG. 2) is provided on the lower rear end side. The cyclone unit 50 can be removed from the housing 2 by pushing the latch button 54 rearward from the state shown in FIG. The cyclone unit 50 has a cylindrical shape with a slightly smaller diameter on the front side and a larger diameter on the rear side. The four parts of housing 73 define its exterior shape.

The dusty air sucked through the extension pipe 48 is taken into the cyclone unit 50 . The cyclone unit 50 uses centrifugal force to separate only dust, and only the separated air is discharged into the motor housing portion 2a from an exhaust port 74 (see FIG. 3 described later) of the cyclone unit 50 formed on the separation surface. let it flow in. The air drawn into the motor accommodating portion 2a from the cyclone unit 50 by the suction of the fan 17 (described later in FIG. 3) passes through the fan 17 and then passes through the exhaust port 5 through the air passage in the exhaust passage portion 2b of the housing 2. It is guided to the vicinity of the inner space and discharged to the outside from the exhaust port 5. - 特許庁The exhaust port 5 is formed by arranging a large number (here, 23) of elongated slit-shaped openings (ventilation windows) obliquely arranged. The overall outline of the exhaust port 5 is elongated in the front-rear direction and short in the vertical direction. Although only the exhaust port 5 formed on the right side of the housing 2 is visible in FIG. 1, a similar exhaust port 5 is formed on the left side of the housing 2 as well. A top cover 33 (details will be described later with reference to FIG. 2) is attached to the upper side of the exhaust port 5 and is designed such that the outer edge of the housing is slightly recessed downward.

A front cover 35 is attached to the front side of the top cover 33 , and a pipe mounting port 36 is formed in the front cover 35 . A latch lever 37 (see also FIG. 2 described later) for locking or unlocking the extension pipe 48 connected to the pipe mounting port 36 is provided on the upper portion of the front cover 35 . The extension pipe 48 can be removed from the main body of the cleaner 1 by moving the extension pipe 48 forward while pushing the tip of the latch lever 37 downward.

FIG. 2 is a longitudinal sectional view of the cleaner 1 of this embodiment. The cleaner 1 drives the motor 15 using the battery pack 100 as a power supply, and rotates the fan 17 attached to the rotating shaft of the motor 15, thereby sucking the air inside the cyclone unit 50 toward the housing 2, thereby creating a negative pressure. As a result, a suction force is generated within the cyclone unit 50 . Therefore, the air and foreign matter outside the housing 2 are sucked from the extension pipe 48, and the air flow (F1 to F7, and F4 to F6, see FIG. 4 described later) that reaches the exhaust port 5 (see FIG. 1). is what causes The fan 17 is fixed to a rotating shaft (not shown) of the motor 15 and rotates in synchronization with the rotation of the motor 15 . The fan 17 is a centrifugal fan, sucks air from the front side along the rotation axis A1, and discharges the air radially outward of the fan 17 . Here, the axis A1 of the rotating shaft of the motor 15 and the axis (center line) of the cyclone unit 50 are coaxially formed, but the positional relationship is not limited to this, and these axes may be shifted in parallel. Alternatively, they may be arranged so as to intersect obliquely.

Air F1 mixed with dust, which flows in through the straight pipe portion 22 of the introduction pipe 20 via a nozzle (not shown) and the extension pipe 48, flows rearward along the axis B1 and reaches the curved portion 23 of the introduction pipe 20 at approximately It is bent downward by 90 degrees and sucked into the cyclone unit 50 from the outlet 23 a of the introduction pipe 20 . The cyclone unit 50 is of a so-called two-stage cyclone system, and the airflow F1 flows into the first swirling chamber 63 which is the first-stage cyclone section. In the first swirl chamber 63, the air sucked like the air flow F2 swirls around the outside of the first inner cylinder unit 80, and part of the air inside passes through the mesh filter 84 of the first inner cylinder unit 80. Sucked inward, the remaining air moves into the first dust collection chamber 53 while swirling like an air flow F3.

Of the air mixed with dust that has reached the first dust collection chamber 53, only the air is directed toward the inside of the first inner cylinder unit 80 from the mesh filter 96 formed on the front end side of the first inner cylinder unit 80 as indicated by arrow F3. is attracted rearward in the direction of the axis A1. At this time, the separated dust accumulates inside the first dust collection chamber 53, particularly near the bottom surface portion 51b. The air sucked inward from the side opening of the first inner cylinder unit 80 and the rear opening flows into the second inflow chamber 64 adjacent to the motor 15 side from the first inner cylinder unit 80 . The second inflow chamber 64 serves as an inlet space to the plurality of second cyclone outer cylinders 65, and the air that has flowed into the second inflow chamber 64 flows into a plurality of It flows into either of the second swirl chambers 66 . In the second swirling chamber 66 , the swirling cyclone flow has a small swirling radius, but the rotating airflow sieves fine dust, and the air near the axis of the swirling flow is discharged into the front opening of the second inner cylinder 69 . and flows into the space in which the filter 77 is accommodated (the filter chamber 79a shown in FIG. 4).

In the chamber in which the filter 77 is accommodated, fine dust particles are further filtered by air passing radially inward from the outer peripheral side of the cylindrical filter 77, and the filtered air flows through the housing 2 like an air flow F7. It flows into the fan 17 side through the intake port 14 . Most of the air that has passed through the fan 17 is discharged upward after flowing downstream along the outer peripheral side of the motor 15 as indicated by F7. Also, part of the air that has passed through the fan 17 flows inside the motor 15 and joins the air that has flowed around the outer circumference of the motor 15 above. The airflow F7 leaving the motor 15 flows forward in the exhaust passage portion 2b. After that, the airflow F7 flows forward through the internal space of the exhaust passage portion 2b, flows to the vicinity of the curved portion 23 of the introduction pipe 20, and is discharged from the exhaust port 5 to the outside of the housing 2. As shown in FIG. Although not visible in FIG. 2, the exhaust port 5 and the flow path of the air flow F7 leading to the exhaust port 5 are arranged on both the left and right sides of the curved portion 23 of the introduction pipe 20, so the intake passage by the introduction pipe 20 , the exhaust passage formed by the exhaust passage portion 2b becomes an independent passage. As described above, the exhaust flow of the cleaner 1 of this embodiment is not immediately discharged to the outside of the housing 2 in the vicinity of the motor 15, but is folded forward in the vicinity of the motor 15 or at the rear end portion of the motor 15. The direction of the air flow is bent as shown in FIG.

The housing 2 is integrally molded of synthetic resin, and except for the handle portion 4, the housing 2 is divided into left and right parts about a vertical plane passing through the axis A1. A plurality of screw bosses 7a to 7e are formed for fixing the split left and right parts with screws (not shown). The divided structure of the housing 2 and the means for fixing the divided portions are optional, and are not limited to the screw bosses 7a to 7f, screw holes (not shown), and fixing mechanisms using screws (not shown).

A switch panel 40 is provided on the upper portion of the handle portion 4 . The switch panel 40 is provided with a push-type OFF button 41 and an ON button 42, and an LED 43 indicating the operating state. These switches and LEDs are mounted on a switch board 44 . When the ON button 42 of the switch panel 40 is pushed, the electric power of the battery pack 100 is supplied to the motor 15 and the fan 17 rotates at the set speed. Each time the ON button 42 is pressed again, the operation switches between the "strong mode" and the "weak mode."When the OFF button 41 is pressed while the motor 15 is rotating, is cut off and the motor 15 stops.

The motor 15 is a brushless DC motor and has a rotor with permanent magnets and a stator core wound with coils. A circular motor substrate 16 on which a magnetic sensor such as a Hall IC is mounted is provided behind the brushless DC motor. The vicinity of the rear end of the motor 15 is fixed to the housing 2 by a motor rear end holding portion 18 . The motor rear end holding portion 18 is made of rubber, for example, and elastically supports the motor 15 to absorb vibrations, and functions as an air guiding means for guiding the air passing through the inside of the motor 15 upward. The motor rear end holding portion 18 has a substantially cup shape with an opening on the front side, and an opening 18a for discharging air is formed on the upper side, thereby forming an air flow indicated by F7.

A fan cover 19 that houses a centrifugal fan 17 is attached near the front end of the motor 15 . The fan cover 19 functions as a fixing member for fixing the motor 15 to the housing 2 by covering the front outer peripheral side and the radially outer side of the fan 17, and has an opening on the outer peripheral side of the motor on the rear side in the axial direction. to form A through hole is formed in the vicinity of the axial center on the front side of the fan cover 19, and the air that has passed through the filter 77 of the cyclone unit 50 flows in as indicated by the air flow F7. A fan guide 13 for guiding the air flow to the fan 17 is provided on the front side of the fan cover 19 . In FIG. 2, the dotted line of the air flow F7 is shown to pass through the center of the motor 15 from the fan 17, but in reality, the air flow F7 is separated from the vicinity of the outer edge of the fan 17 to the rear side of the fan cover 19, and then the motor It flows along the outer peripheral surface of the motor 15 or dispersively flows inside the motor 15 and is discharged from the opening 18 a formed in the upper direction of the motor rear end holding portion 18 .

A plurality of body-side connection terminals (not visible in the drawing) are provided below the battery mounting portion 2c of the housing 2, and rail mechanisms 46 for holding the battery pack 100 are provided on both left and right sides of the body-side connection terminals. . A control circuit board 45 on which a circuit for controlling the rotation of the motor 15 is mounted is provided inside the battery mounting portion 2c between the rail mechanism 46 (not shown) and the hollow through portion 4c when viewed in the vertical direction. The body-side connection terminals (not shown) are connected to the control circuit board 45 and fitted with the battery-side connection terminals 103 of the battery pack 100 . The control circuit board 45 carries a circuit for controlling the rotation of the motor 15, and includes a control microcomputer. The switch board 44 and the control circuit board 45 are connected by a multicore flat cable (not shown).

In the cyclone unit 50, air mixed with dust is sucked radially from the first inflow chamber 61 formed on the upper side to the first swirling chamber 63 like the air flow F1. Only air from which dust has been separated by centrifugation and filtration in the cyclone unit 50 reaches the fan 17 in the housing 2 . Here, the cyclone unit 50 is a first cyclone that rotates the air that is sucked from a nozzle (not shown) and flows in from an intake port (air intake opening 61a) about an axis A1 to centrifuge dust and then exhausts it to the outside. The air discharged from the section (the first swirling chamber 63 and the first dust collection chamber 53) and the first cyclone section is rotated about the second axis to centrifuge the dust, and then the air is discharged to the outside. It has a plurality of second cyclone sections (second swirl chamber 66 and second dust collection chamber 67), and the second cyclone sections are arranged in the circumferential direction outside the swirl chamber (first swirl chamber 63) of the first cyclone section. is placed in

Although only one second swirl chamber 66 is visible in the drawing, a plurality of the second swirl chambers 66 are arranged side by side in the circumferential direction in a portion other than the portion where the first swirl chamber 63 is formed. The inner space of the dust collection case 51 is the first dust collection chamber 53 , and the space defined by the dust collection case 51 and the dust collection chamber cover 97 is the second dust collection chamber 67 . A second inflow chamber 64 serving as an inflow passage to a plurality of second cyclone chambers is provided on the side closer to the motor 15 when viewed from the first housing 60 . The second inflow chamber 64 has a front side defined by a rear portion of the first housing 60 and a rear side closed by a second housing 68 . Further, the position of the cyclone unit 50 in the direction of the first axis A1 is configured such that at least a portion thereof overlaps with the housing 2 on the main body side. Also, when viewed in the radial direction of the cyclone unit 50, it is arranged at a position overlapping at least a portion of the housing 2 on the main body side.

A first inner cylinder unit 80 is provided inside the first swirl chamber 63 of the cyclone unit 50 . The first inner cylinder unit 80 is formed substantially coaxially with the axis of the motor 15 and has a cup-like shape with one end near the motor 15 open and the end opposite the motor 15 closed. A cylindrical filter 77 is provided in the space on the rear side of the cyclone unit 50 . The filter 77 is a member having a predetermined thickness in the radial direction, and the air flowing from the radially outer side to the inner side flows into the housing 2 through an exhaust port (described later in FIG. 3) of the cyclone unit 50. do.

FIG. 3 is a perspective view of the cyclone unit 50 of FIG. 1 removed. The cyclone unit 50 is configured to be detachable from the housing 2. A latch button 54 for fixing or removing is provided on the front side, and a latching claw for latching to the latching portion 9 of the housing 2 is provided on the rear side. 78 are provided. The exterior portion of the cyclone unit 50 is an assembly of a plurality of members integrally molded of synthetic resin into a cylindrical shape. It is composed of four separable parts, two housings 68 and a third housing 73 . In order to connect or separate these four parts, a latch mechanism (latch button 54, latch lever 56, latch lever 71, etc.) are provided. The latching claw 78 and the latch button 54 are a mounting mechanism for mounting the entire cyclone unit 50 to the housing 2 on the main body side. Latch holders 55 are formed on both sides of the latch button 54 in the circumferential direction. The cyclone unit 50 can be removed from the housing 2 by rotating the cyclone unit 50 in the removal direction 10 shown in FIG. 1 while pressing the latch button 54 . A positioning portion 55 a for positioning the cyclone unit 50 in the correct position of the housing 2 is provided on the extension of the movement direction of the latch button 54 . To attach the cyclone unit 50 to the housing 2, the hooking claw 78 is positioned on the hooking portion 9 (see FIG. 2) of the housing 2, and then the cyclone unit 50 is moved in the direction opposite to the arrow 10 in FIG. It suffices to operate the latch button 54 to put it in a locked state.

A latch mechanism including a latch lever 56 and a latch holder 57 provided on the dust collection case 51 is used to connect or disconnect the first housing 60 and the dust collection case 51 . By pushing one side (front end) of the swinging latch lever 56 in the direction of the axis A1, the dust collection case 51 can be removed from the removed cyclone unit 50 as shown in FIG. Since the dust accumulated by the operation of the cleaner 1 is accumulated in the dust collection case 51, the dust inside can be discarded by turning the removed dust collection case 51 upside down in the garbage bag or on the trash can. Here, the circumferential position where the latch lever 56 is provided is the upper portion of the cyclone unit 50, which is hidden by the exhaust passage portion 2b (see FIG. 1) of the housing 2 when the cyclone unit 50 is mounted. Therefore, the operator cannot operate the latch lever 56 when the cyclone unit 50 is attached to the main body.

The second housing 68 and the third housing 73 form filter chambers 79a and 79b (refer to FIG. 4, which will be described later) for accommodating the filter 77. As shown in FIG. A latch mechanism including a latch lever 71 and a latch holder 72 provided on the second housing 68 is used to connect or disconnect the second housing 68 and the third housing 73 . A latch cover 75 is formed on the third housing 73, and latch claws (not visible in the drawing) are formed on the inner portion thereof. By separating the second housing 68 and the third housing 73, the filter 77 housed inside can be taken out. Since fine dust accumulates on the outer peripheral surface of the filter 77 , a small amount of dust accumulates on the outer peripheral surface of the filter 77 . The operator can sift dust from the removed filter 77 .

The first housing 60 and the second housing 68 are fixed not by a latch mechanism, but by a plurality of screws oriented parallel to the direction of the axis A1 (not shown). Therefore, the first housing 60 and the second housing 68 cannot be separated during normal use.

In the cyclone unit 50, air mixed with dust is sucked in the radial direction from the first inflow chamber 61 formed on the side to the first swirl chamber 63. As shown in FIG. A circular exhaust port 74 is formed on the rear side of the cyclone unit 50 , and only air from which dust has been separated by centrifugal separation and filtration by a filter in the cyclone unit 50 is exhausted from the exhaust port 74 . The annular rear wall surface 73a on which the exhaust port 74 of the cyclone unit 50 is formed is positioned so that when the cyclone unit 50 is attached to the housing 2 (see FIG. 2), it Positioned so as to face the face. A cylindrical filter 77 is provided inside the exhaust port 74 . The filter 77 is a member having a predetermined thickness in the radial direction, and allows air to pass from the radially outer side to the inner side. Air that has passed through the filter 77 flows into the housing 2 as exhaust from the cyclone unit 50 . Sealing between the cyclone unit 50 and the housing 2 on the main body side is ensured by the engagement structure between the rear wall surface 73a and the intake port 14 of the housing 2 (see FIG. 2).

4 is a longitudinal sectional view of the cyclone unit 50 of FIG. 3. FIG. The first inner cylinder unit 80 is arranged on the axis A<b>1 of the first swirl chamber 63 by being mounted inside the cylindrical rib 70 of the second housing 68 . Six frame portions 83 extending parallel to the axis A1 are formed in the first inner cylinder unit 80, and portions other than the columnar frame portions 83 are opened to prevent the inflow of air from the radially outer side to the inner side. allow. A net-like mesh filter 84 is provided on the outer peripheral surface of the frame portion 83, and the air on the inner peripheral side of the first swirl chamber 63 passes from the radially outer side to the inner side through the mesh filter 84 positioned at the opening. Air containing dust that cannot pass through the mesh filter 84 moves outside the mesh filter 84 toward the bottom surface portion 51b. When the motor 15 stops and the air flow by the fan 17 stops, the dust that cannot pass through the mesh filter 84 and remains on its outer surface falls from the surface of the mesh filter 84 due to gravity and falls on the enlarged diameter portion 87. It falls along the slope on the outer peripheral side and falls into the inside of the first dust collection chamber 53 . Since the large-diameter portion 89 of the enlarged-diameter portion 87 is formed to protrude radially outward in this manner, it is possible to move dust that cannot pass through the mesh filter 84 toward the first dust collection chamber 53 . Become. Further, since the enlarged diameter portion 87 is formed to expand like an umbrella, the dust guided from the first swirl chamber 63 to the first dust collection chamber 53 side is greatly suppressed from returning to the first swirl chamber 63 side again. can.

An opening (refer to the opening 89a, which will be described later in FIG. 6 for reference numerals) is formed on the side of the enlarged diameter portion 87 facing the first dust collection chamber 53 (on the front inner side and on the side opposite to the intake port). The structure is such that air is sucked in the direction of the axis A1. A mesh filter 96 is provided in the opening. That is, in the first cyclone section of the present embodiment, the first inner cylinder unit 80 has two openings, an opening for sucking radially inward from the outer peripheral surface of the cylindrical section and an opening at the end face of the enlarged diameter section of the cylindrical section. The mesh filters 84 and 96 are provided at the respective openings.

Inside the mesh filter 96, a rectifying member (rectifying means) 90 (refer to FIG. 6 described later for reference numerals) for rectifying the flow of the air flow F3 is mounted. The straightening member 90 is an integral member formed with a plurality of ribs 91 to 94 (93 is not visible in the figure) extending in a direction parallel to the axis A1, and is inserted inside the large diameter portion 89 of the first inner cylinder unit 80. be. The ribs 91 and 92 are cylindrical ribs, and the rib 94 is a flat rib extending radially. The ribs 91 to 94 arranged inside the mesh filter 96 are provided to cancel the swirling component of the airflow F3 around the axis A1 after passing through the mesh filter 96, so to speak, to perform a rectifying function. Further, a flat plate-shaped rib 95 is formed extending from the rib 94 side to the outside of the first inner cylinder unit 80 so as to intersect the mesh filter 96 . The rib 95 suppresses the flow component in the rotational direction of the airflow F3 that flows while turning about the axis A1, and is also a place for an operator to grasp by hand when removing the first inner cylinder unit 80 from the first housing 60. Functions as a knob.

A first swirl chamber 63 is formed on the outer peripheral side of the first inner cylinder unit 80 . A first swirl chamber 63 is defined within the inner tubular portion of the first housing 60 . The front side of the first housing 60 has a circular opening, and the dust collection case 51 is mounted in front of the opening so as to sandwich the dust collection chamber cover 97 . The dust collection case 51 is latched by a latch claw 52 at one point in the circumferential direction, and the upper side is fixed to the first housing 60 by a latch lever 56 . The dust collection chamber cover 97 forms a space that becomes the second dust collection chamber 67 between the dust collection case 51 and the dust collection chamber cover 97 . The second dust collection chamber 67 is a space continuous in the circumferential direction. is removed upward, the dust accumulated in the second dust collection chamber 67 falls inside the first dust collection chamber 53 . Therefore, when disposing of the dust, the operator removes the dust collection case 51, removes the dust collection chamber cover 97 from the dust collection case 51, and moves the dust collection case 51 to the trash can. The dust in the first dust collection chamber 53 and the second dust collection chamber 67 can be collectively discarded. As a result, it is possible to easily carry out a normal dust disposal operation except dust removal of the filter 77 and the mesh filters 84 and 96 .

The air (air flow F4) that has flowed from the opening 85 to the second inflow chamber 64 passes through the second inflow chamber 64 and then flows through any of the plurality of second cyclone units arranged on the outer peripheral side of the first swirling chamber 63. flows into the second swirl chamber 66 of A conical second cyclone outer cylinder 65 of the second swirl chamber 66 is formed integrally with the first housing 60 . The front side of the second inner cylinder 69 is an opening 69a, and the front side of the opening 69a is separated from the conical second cyclone outer cylinder 65 by a predetermined distance. Due to the tornado-like swirling airflow in the second swirling chamber 66, the centrifugally separated dust and the like moves into the second dust collecting chamber 67 from the opening 65a along the outer peripheral surface. On the other hand, air other than dust is sucked from the second inner cylinder 69 into the filter chamber 79a. The second dust collection chamber 67 is a space commonly used by a plurality of second cyclone units arranged side by side in the circumferential direction. The second dust collection chamber 67 is formed using the same internal space of the dust collection case 51 as the first dust collection chamber 53 .

The filter chambers 79 a and 79 b are spaces defined by the second housing 68 and the third housing 73 and serve as spaces for accommodating the cylindrical filter 77 . The filter 77 is added to assist the function of the cyclone unit 50, is a filtration filter formed by folding a filter member into a pleated shape, and can be manufactured using a commercially available known filter material. When the filter 77 is disengaged from the engaging portion formed in the latch cover 75 of the latch claw 71a by operating the rocking latch lever 71 on the rear upper portion of the removed cyclone unit 50, the second housing 68 is removed. and the third housing 73 can be separated, and the filter 77 can be removed. An exhaust port 74 is formed on the rear side of the filter holder 76 , and the inner filter chamber 79 b communicates with the exhaust port 74 .

A locking piece 73 c for fixing the cyclone unit 50 is formed at one location near the rear end of the third housing 73 . A hooking portion 9 (see FIG. 2) is formed at a portion of the housing 2 corresponding to the locking piece 73c. A latch button 54 and a positioning portion 55a are formed on the front upper portion of the cyclone unit 50 . At a position of the housing 2 corresponding to the latch button 54, that is, on the lower side of the front cover 35 shown in FIG. The latch button 54 is biased forward by a spring (not shown), and maintains the engaged state between the latch claw 54a and the claw portion 29 when the operator's pressing state is released.

In the cyclone unit 50 of the present embodiment, a centrifugal separation space in which the first swirling chamber 63 is located, in which the portion of the first inner cylinder unit 80 excluding the enlarged diameter portion is arranged, and dust collection by the first dust collection chamber 53. An inflow space whose swirl space is narrowed by the enlarged diameter portion 87 is arranged between the space. The inner peripheral side portion of the inflow space is restricted by the enlarged diameter portion 87 of the first inner cylindrical unit 80 , and the outer peripheral side portion thereof is restricted by the inner cylindrical portion 97 a of the dust collection chamber cover 97 . Here, the upper end diameter D1 of the first dust collection chamber 53 is made larger than the outer diameter D2 of the lower end of the centrifugal separation section defined by the inner cylindrical portion 97a. Further, the outer diameter D3 of the bottom opening of the expanded diameter portion 87 is made larger than the inner diameter D4 of the cylindrical portion 82 of the first inner cylinder unit 80 (refer to FIG. 6, which will be described later). With such a size relationship, the inner diameter D3 of the bottom opening 89a through which part of the dust-containing air formed at the bottom of the large diameter portion 89 passes to the suction side of the cleaner body is equal to the inner diameter D4 of the inner cylinder. , the suction efficiency can be improved.

FIG. 5 is a cross-sectional view taken along line AA of FIG. 4, and is a cross-sectional view perpendicular to the axis A1. The inside of the first outer cylinder 62, which is the outer wall of the first swirling chamber 63, becomes the swirling portion (first swirling chamber 63) of the first cyclone unit, and the outside of the first outer cylinder 62 and the outer wall portion of the first housing 60. The inside serves as a space for accommodating ten second cyclone outer cylinders 65 of the second cyclone section. Each second cyclone section is mainly composed of a second cyclone outer cylinder 65 defining a swirl space and a second inner cylinder 69 coaxially arranged on the inner peripheral side thereof. A space between the second cyclone outer cylinder 65 and the second inner cylinder 69 becomes the second swirl chamber 66 . The non-motor side end (front end) of the second inner cylinder 69 opens into the second dust collection chamber 67, and the air near the rotation axis of the air flow swirling in the second swirling chamber 66 is discharged. It is configured to flow toward the motor side (rear side) when viewed axially inside the second inner cylinder 69 and into the filter chamber 79a (see FIG. 4).

The dust-laden air guided into the cyclone unit 50 flows in the tangential direction of the first swirl chamber 63 and flows through the intake opening 61a of the cyclone unit 50 into the first inflow chamber 61 like the air flow F1. is sucked into the first swirl chamber 63 from the At this time, the first inflow chamber 61 is obliquely formed so that the inflowing air flow F1 is directed in the tangential direction of the first swirling chamber 63, and the first exhaust port 61b is shaped so as to be constricted in the circumferential direction. As a result, a strong cyclone flow centering on the axis A1 is generated within the first swirl chamber 63 . A small cyclone flow (air flow F5) is also formed in the second cyclone outer cylinder 65 . Here, due to the shape of the inflow chamber (not visible in the figure) to the second cyclone outer cylinder 65, the rotation direction of the adjacent second cyclone outer cylinder 65 is reversed. However, the direction of rotation inside the second cyclone outer cylinder 65 is not important, and all of them may be configured to rotate in the same direction, or the respective rotation directions may be set arbitrarily.

The first inner cylinder unit 80 has six frame portions 83 formed at intervals of 60 degrees in the circumferential direction. A mesh filter 84 is provided on the outer peripheral surface of the frame portion 83 or near the outer peripheral surface. A cylindrical inner cylinder rib 92 and a rib radially connecting two rotationally symmetrical portions thereof, that is, an inner rectifying plate 94, are visible from the front side of the cross-sectional position of FIG. Also, it will be understood that the expanded diameter portion 87 is formed so as to protrude sufficiently outside the outer diameter of the mesh filter 84 .

6 is a side view of the first inner cylinder unit 80 of FIG. 4. FIG. The first inner cylinder unit 80 is manufactured by integral molding of synthetic resin, and has a mounting portion 81 formed on the rear side (closer to the fan 17) when viewed in the direction of the axis A1, and a substantially constant front side. A cylindrical portion 82 having an outer diameter is formed, and one end side of the cylindrical portion 82, ie, the side opposite to the mounting portion 81, is formed with an enlarged diameter portion 87 formed so as to greatly increase the outer diameter. Strictly speaking, the shape of the cylindrical portion 82 includes a filter mounting portion 82a having a constant outer diameter, a tapered portion 82b adjacent to the filter mounting portion 82a and having a slightly reduced outer diameter, a tapered portion 82b and an enlarged diameter portion 87. , and a small diameter portion 82c having the smallest outer diameter is formed. An exhaust outlet 86 is formed at the end of the mounting portion 81 near the fan 17 (see FIG. 2). Six frame portions 83 extending in the direction of the axis A1 are formed at equal intervals in the radial direction over substantially the entire area of the filter mounting portion 82a. A mesh filter 84 is provided to block the.

The enlarged diameter portion 87 of the first inner cylinder unit 80 is formed with an umbrella-like inclined surface 88 with a large diameter, and a large diameter portion 89 that extends the outer edge portion of the enlarged inclined surface 88 in the direction of the axis A1 while maintaining the same diameter. be done. The large diameter portion 89 is a portion of the first inner cylinder unit 80 that has the largest outer diameter. The end of the large diameter portion 89 forms an opening 89a, and a rectifying member 90 is mounted in the opening 89a from the outside toward the inside in the direction of the axis A1. The rectifying member 90 is manufactured by integral molding of synthetic resin and is a holding member for attaching the mesh filter 96 to the opening 89a. In this embodiment, the rectifying member 90 is not simply a holding member for the mesh filter 96, but has a rectifying function for regulating the flow of the air flow F3 (see FIG. 4) passing through the mesh filter 96. Therefore, the straightening member 90 is formed to have a surface parallel to the direction of the axis A1.

In order to cancel out the rotation component of the air flow that flows in while rotating in the circumferential direction inside the first dust collection chamber 53, the straightening member 90 has a cylindrical outer cylinder rib 91 provided on the outer peripheral side and a rib 91 on the inner peripheral side. It is formed by a cylindrical inner cylinder rib 93 provided and a plate-shaped radial rib 93 connecting these ribs 91 and 93 in the radial direction at several points. Six radial ribs 93 are provided at intervals of 60 degrees in the circumferential direction. Further, an inner rectifying plate 94, which is a flat plate-like rib, is provided so as to connect two points symmetrical to the axis A1 of the inner cylindrical rib 93. As shown in FIG. A mesh filter 96 is provided to cover all the front ends of these ribs 91-94. The method of forming the mesh filter 96 is arbitrary, and the mesh may be attached to the front end portions of the ribs 91 to 94, or the mesh may be cast during the injection molding of the ribs 91 to 94. An outer straightening plate 95 is formed on the inner straightening plate 94 and extends outside the enlarged diameter portion 87 so as to penetrate the mesh filter 96 . The outer straightening plate 95 is arranged at a central position including the axis A1, and has a function of suppressing the rotational component of the air flow F3 before flowing from the inside of the first dust collection chamber 53 through the opening 89a of the enlarged diameter portion 87. fulfill

As described above, in this embodiment, an opening (opening 89a) is provided at the end of the first inner cylinder unit 80 facing the first dust collection chamber 53, and the opening is covered with the mesh filter 84 for suction. I was able to improve my efficiency. In addition, after the air flow swirling outside the inner cylinder and the dust guard enters the first inner cylinder unit 80, the flow in the swirling direction is suppressed and the air flows smoothly in the direction of the axis A1. Even from a fluid point of view, there is little loss. On the other hand, if a rectifying plate (ribs 91 to 94) is provided in the internal space of the cylindrical portion 82 so that the air flow F3 flows in the direction of the axis A1, the cross-sectional area of the flow path inside the cylindrical portion 82 decreases, so the flow rate decreases. Resulting in. Therefore, in this embodiment, the rectifying member 90 for holding the mesh filter 84 is provided after securing a sufficient area for the opening 89a by increasing the diameter thereof, so that there is no fear of lowering the intake efficiency.

7 is a perspective view of the first inner cylinder unit 80 of FIG. 6. FIG. L-shaped grooves 81a corresponding to convex portions (not shown) formed on the inner peripheral side of the cylindrical rib 70 (see FIG. 4) are formed at two locations of the mounting portion 81 in the circumferential direction. The inner cylinder unit 80 is held so as not to drop off from the cylindrical rib 70.例文帳に追加It should be noted that how the first inner cylinder unit 80 and the cylindrical rib 70 (see FIG. 4) are held is arbitrary, and other fixing means such as screwing or screwing may be used. The mesh filter 84 is continuously affixed to the outer periphery of the cylindrical portion 82 , or is fixed by being cast during injection molding of the first inner cylinder unit 80 . Square through-holes 89b in side view are formed in two places in the circumferential direction of the large-diameter portion 89 of the enlarged-diameter portion 87, and are engaged with convex portions 91a formed on the outer peripheral surface of the outer cylindrical rib 91. The straightening member 90 is held so as not to fall off the first inner cylinder unit 80 .

As can be seen in FIG. 7, the outer rectifying plate 95 is formed in a trapezoidal shape, the width _W1 on the connection side (bottom side) with the inner rectifying plate 94 and the mesh filter 96, and the end on the side away from the mesh filter 96 ( The side closer to the bottom surface portion 51b) has a width of _W2 , and the relationship of _W1 > _W2 is established. The length of the outer rectifying plate 95 in the direction of the axis A1 is preferably set to a length that can be easily grasped by an operator's fingers.

8 is a bottom view of the first inner cylinder unit 80 of FIG. 6. FIG. For manufacturing reasons, the mesh filter 96 is arranged so as to cover the entire lower surface and opening of the rectifying member 90 . Here, in addition to the two cylindrical ribs (91, 92), there are six radially extending radial ribs (91, 92) for suppressing the rotational component of the incoming airflow while rotating in the circumferential direction. A directional rib 93 is formed. In addition, since the diameter of the expanded diameter portion 87 (see FIG. 6 for reference numerals) is sufficiently large, the total cross-sectional area of the space excluding the ribs 91 to 94 is larger than the cross-sectional area of the inner diameter of the cylindrical portion 82 (see FIG. 7). becomes sufficiently large, and an increase in the inflow resistance of the airflow F3 can be suppressed.

FIG. 9 is a side view of the cyclone unit 50 of FIG. 1 in a detached state. The dust collection case 51 has a large-diameter portion 51c at the rear portion where the opening surface 51a is formed, and a small-diameter portion 51e at the front portion where the bottom surface portion 51b is formed. It becomes the part 51d.

FIG. 10 is a vertical cross-sectional view of the dust collection case 51 of FIG. 9 removed. The dust collection case 51 is manufactured by integral molding of synthetic resin, and the connecting portion from the small diameter portion 51e to the large diameter portion 51c forms a tapered inclined portion 51d. Since the diameter of the portion near the opening surface 51a is increased in this way, after the dust moves away from the opening surface 51a in the direction of the axis A1 due to the centrifugal force, ) toward the mesh filter 96, it is possible to suppress adhesion of dust to the vicinity of the outer edge of the opening surface 51a. A latch holder 57 is provided on a part of the outer peripheral surface of the large diameter portion 51c. A latching pawl 52 is provided at a position separated from the latch holder 57 by about 180 degrees in the circumferential direction.

As shown in FIG. 4, the air flow (air flow F3) in the dust collection case 51 is a tornado-like air that changes its direction toward the front in the direction of the axis A1 (downstream side when viewed from the mesh filter 96), and moves toward the inner peripheral side. Air flows forward in the direction of the axis A1 (upstream as viewed from the mesh filter 96). Since the air flow F3 at this time flows while rotating around the axis A1, not only the dust but also the air increases toward the outer peripheral side due to the centrifugal force, and the portion near the axis A1 becomes thinner than the surrounding air, so-called negative pressure. become a state. In order to prevent this, inside the dust collection case 51, the outer diameter of the downstream side of the filter, that is, the side (small diameter portion 51e) near the bottom portion 51b is made small. A guide rib 58 projecting from the outer side of the dust collecting case 51 to the inner side is formed. The guide rib 58 is formed of a body portion 58a extending substantially parallel to the axis A1 from the bottom portion 51b, and a connecting portion 58b smoothly connecting the upper end of the body portion 58a to the inner wall of the dust collecting case 51. As shown in FIG.

11 is a cross-sectional view of the BB portion of FIG. 10. FIG. Here, the flow of the air flow F3 in the circumferential direction is shown, and the air flowing along the inner wall surface of the dust collection case 51 toward the outer peripheral side is directed toward the inner peripheral side by the guide ribs 58, that is, deflected inward. You can understand. An air flow F3 indicated by a dotted line indicates the flow of air in a portion overlapping the guide rib 58 in the axial direction. Since the inner wall surface is circular, it is not deflected inwards. Therefore, of the inner space (first dust collection chamber 53) of the dust collection case 51, the portion above the guide rib 58 smoothly rotates in the circumferential direction without being deflected, and overlaps the guide rib 58 when viewed in the direction of the axis A1. In the lower portion (near the bottom surface portion 51b), the deflected rotating air is deflected inward at two points in the circumferential direction.

12 is a cross-sectional view of the CC portion of FIG. 10. FIG. The guide rib 58 has an inclined surface 58d so that the upstream side of the air flow F3 becomes an inclined wall surface. In order to form the inclined surface 58d, a concave portion 59 is formed in which the outer wall surface is recessed toward the inside when the dust collecting case 51 is molded. Since the concave portion 59 is formed in this way and the guide rib 58 is formed in the shape of the inner wall, the air flow in the first dust collection chamber 53 can be straightened and the strength of the dust collection case 51 can be improved. . Further, since the recess 59 is formed in a part of the dust collection case 51 in the circumferential direction, there is an advantage that the dust collection case 51 can be easily held by the operator.

FIG. 13 is a longitudinal sectional view of a cyclone unit 50A according to a second embodiment of the invention. The second embodiment differs from the first embodiment in the shape of the first inner cylinder unit 80A. That is, the first inner cylinder unit 80 of the cyclone unit 50 of the first embodiment is replaced with the first inner cylinder unit 80A of the second embodiment, and other parts are the same. The first inner cylinder unit 80A of the second embodiment is characterized in that an opening 85 as shown in FIG. 6 is not provided on the outer peripheral surface of the cylindrical portion 82 (see FIG. 14 described later). Therefore, no mesh filter is attached to the outer peripheral surface of the cylindrical portion 82 (see FIG. 13 described later). By configuring in this manner, out of the portion of the air flow F2 that rotates in the first swirl chamber 63, no air is sucked radially inward, so that the swirl flow in the first swirl chamber 63 is not disturbed. Air reaches the inside of the first dust collection chamber 53 . The air that has reached the inside of the first dust collection chamber 53 flows into the inner space of the first inner cylinder unit 80A through the mesh filter 96 provided at the end of the first inner cylinder unit 80A, and flows along the axis A1. It flows rearward through the first inner cylinder unit 80</b>A and into the second inflow chamber 64 .

In the second embodiment, the opening for the air reaching the inside of the first inner cylinder unit 80A is limited only to the inside of the enlarged diameter portion 87 of the first inner cylinder unit 80A. Since the dust passes through the first dust collection chamber 53, the dust does not stay in the first swirl chamber 63, especially around the mesh filter 84 shown in FIG. will be stored in In addition, since the rectifying members 90 are provided inside the opening 89a of the enlarged-diameter portion 87 of the first inner cylinder unit 80A (on the side close to the fan 17) and outside the opening 89a, the flow that swirls in the circumferential direction is suppressed. Therefore, the circumferential direction flow component of the air flow F3 flowing into the first inner cylinder unit 80A while turning can be suppressed, and the first inner cylinder unit 80A can be smoothly drawn along the axis A1. .

14 is a perspective view of the first inner cylinder unit 80A of FIG. 13. FIG. As is apparent from FIG. 14, the cylindrical portion 82 is not provided with an opening, is a closed cylindrical surface 82a', and is not provided with a filter member such as a mesh filter (see 84 in FIG. 6). The shape and structure of the other parts, that is, the enlarged diameter part 87 and the mounting part 81 are the same as those of the first inner cylinder unit 80 shown in FIG. Further, the shape of the rectifying member 90 including the outer rectifying plate 95 projecting in the direction of the axis A1 from the enlarged diameter portion 87 is the same. Therefore, the operability of the cyclone unit 50A, especially the procedure for discarding accumulated dust, etc., is exactly the same as that of the cyclone unit 50 of the first embodiment.

FIG. 15 is a perspective view of the removed cyclone unit 50A according to the second embodiment of the present invention. Externally, the cyclone unit 50 according to the first embodiment and the cyclone unit 50A according to the second embodiment are exactly the same. The dust collection case 51 is formed with guide ribs 58 as shown in FIGS. One circumferential side of the concave portion 59 forms an inclined surface 59a whose radial position gradually faces outward. Although the guide ribs 58 are formed in the dust collection case 51 of the second embodiment, the dust collection case 51 may be formed without the guide ribs 58 .

Although the present invention has been described above based on the embodiments, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the invention. For example, the filter elements in the first inner cylinder unit 80 are not made of mesh, such as the mesh filters 84, 96, but rather small holes, such as 1-3 mm, passing through the first inner cylinder unit 80 from the outside to the inner part. An effect equivalent to that of a net may be generated by arranging a large number of holes of approximately may be configured.

1 Cleaner 2 Housing 2a (Housing) Motor accommodating portion 2b (Housing) Exhaust passage 2c (Housing) Battery mounting portion 4 Handle portion 4a Inclined portion 4b Horizontal portion 4c Through portion 5 Exhaust port 7a to 7f Screw boss 9 Hook Part 10 Removal direction 13 Fan guide 14 Air inlet 15 Motor 16 Motor board 17 Fan 18 Motor rear end holding part 18a Opening 19 Fan cover 20 Introduction pipe 22 (Introduction pipe) straight pipe part 23 (Introduction pipe) curved part 23a Outlet 29 claw portion 33 top cover 35 front cover 36 pipe mounting port 37 latch lever 40 switch panel 41 off button 42 on button 43 LED 44 switch board 45 control circuit board 46 rail mechanism 48 extension pipe 50 cyclone unit 51 dust collection case 51a opening surface 51b bottom surface portion 51c large diameter portion 51d inclined portion 51e small diameter portion 52 latch claw 53 first dust collection chamber 54 latch button 54a latch claw 55 latch holder 55a positioning portion 56 latch lever 57 latch holder 58 guide rib 58a body portion 58b connection portion 58c downstream side Side surface 58d Inclined surface 59 Recessed portion 59a Inclined surface 60 First housing 61 First inflow chamber 61a Suction opening 61b First exhaust port 62 First outer cylinder 63 First swirling chamber 64 Second inflow chamber 65 Second cyclone outer cylinder 65a Opening 66 Second Second turning chamber 67 Second dust collection chamber 68 Second housing 69 Second inner cylinder 69a Opening 70 Cylindrical rib 71 Latch lever 71a Latch claw 72 Latch holder 73 Third housing 73a Rear wall surface 73c Locking piece 74 Exhaust port 75 Latch cover 76 Filter Holder 77 Filter 78 Hooks 79a, 79b Filter chambers 80, 80A First inner cylinder unit 81 Mounting portion 81a L-shaped groove portion 82 Cylindrical portion 82a Filter mounting portion 82b Taper portion 82c Small diameter portion 83 Frame portion 84 Mesh filter 85 Opening 86 Exhaust outlet 87 Large diameter portion 88 Inclined surface 89 Large diameter portion 89a Opening 89b Through hole 90 Straightening member 91 Outer cylinder rib 91a Convex part 92 Inner cylinder rib 93 Radial direction rib 94 Inner straightening plate 95 Outer straightening plate 96 Mesh filter 97 Collection Dust chamber cover 97a Inner cylindrical portion 100 Battery pack 101 Latch button 103 Battery side connection terminal A1 Axis

Claims (11)

a motor;
a fan driven by the motor;
a body housing containing the motor and the fan therein, and having an air intake through which the air flow from the fan enters;
An outer cylinder having a cylindrical shape and forming a swirling chamber, which can be attached to the main body housing so as to cover the intake port, and which is accommodated in the outer cylinder and communicates the inside of the outer cylinder and the intake port. an inner cylinder serving as a passage through which air flows through, and an intake port provided on a side wall of the whirling chamber for communicating between the inside and the outside, and for directing the airflow entering the whirling chamber in a circumferential direction around the central axis of the inner cylinder. and a cyclone unit having
the outer cylinder includes a dust collection chamber adjacent to the swirl chamber on the opposite side of the intake port in the central axis direction,
The inner cylinder includes a cylindrical portion extending in the direction of the central axis and having both ends opened, and a cylindrical portion continuously disposed on the side opposite to the intake port of the cylindrical portion and closer to the intake port than the dust collection chamber , The intake port side in the direction of the central axis communicates with the cylindrical portion, and the side opposite to the intake port communicates with the outside of the inner cylinder, and has an enlarged diameter portion having an outer diameter larger than that of the cylindrical portion, and a portion centered on the central axis . and a rectifying portion provided inside the enlarged diameter portion in the radial direction and extending in the central axis direction. The diameter - enlarged portion has an umbrella-like shape, is arranged so that the opening face faces the dust collection chamber, and the diameter of the bottom opening of the diameter-enlarged portion is larger than the inner diameter of the tubular portion. A cleaner according to claim 1. 3. The cleaner according to claim 2, wherein a mesh filter is provided at the end of the enlarged diameter portion in the central axis direction. an outer straightening plate extending from the central axis direction end of the enlarged diameter portion toward the dust collection chamber ,
2. A cleaner according to claim 1 , wherein the width of said outer current plate in the width direction perpendicular to said central axis is smaller than the outer diameter of said enlarged diameter portion in said radial direction. 5. A cleaner according to claim 4, wherein said outer rectifying plate extends parallel to said central axis. 5. A duplicate straightening plate is provided in said straightening section, and a straightening plate including said central axis among said straightening plates is connected to said outer straightening plate to act as an integrated straightening means. Cleaner as described in . An air passage portion communicating radially from the outer peripheral side to the inner peripheral side is formed in a part of the outer peripheral surface of the inner cylinder,
7. The cleaner according to claim 6, wherein a filter is arranged in said air passing portion. 3. An inner wall of said dust collection chamber of said outer cylinder is provided with a guide rib protruding radially inward, and said guide rib directs a swirling airflow so as to approach a central axis. 7. Cleaner according to 7. 9. The cleaner according to claim 8, wherein an outer wall of said dust collecting chamber of said outer cylinder has a recess formed along said guide rib. 10. The dust collecting chamber according to any one of claims 2 to 9, wherein the diameter of the upper end of the dust collecting chamber is larger than the outer diameter of a portion of the outer cylinder which is located at the same position in the central axis direction as the lower end of the enlarged diameter portion. A cleaner according to any one of the preceding clauses. The cyclone unit is
a first cyclone unit for centrifugally separating dust by rotating the air sucked from the nozzle and flowing in from the suction port about a first axis, and then exhausting the air to the outside;
a plurality of second cyclone units for centrifugally separating dust by rotating the air discharged from the first cyclone unit about a second axis, and then discharging the air to the outside;
The plurality of second cyclone sections are arranged side by side in the circumferential direction outside the swirling chamber of the first cyclone section, and the positions in the first axial direction and the radial direction of the first axial line are in the main body. 11. A cleaner according to any preceding claim, provided to overlap at least a portion of the housing.

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