CN109661543B

CN109661543B - Air purifier

Info

Publication number: CN109661543B
Application number: CN201780012137.0A
Authority: CN
Inventors: 伊藤克浩; 小滨卓; 中村芳纪; 内村谦介
Original assignee: Sharp Corp
Current assignee: Sharp Corp
Priority date: 2016-09-12
Filing date: 2017-02-07
Publication date: 2021-04-06
Anticipated expiration: 2037-02-07
Also published as: PH12018501596A1; SG11201806406RA; JP6768071B2; JPWO2018047367A1; WO2018047367A1; TW201812221A; CN109661543A; TWI661165B

Abstract

Provided is an air cleaner which can reduce the manufacturing cost. The air cleaner is provided with: a casing (2) having an inlet (3) and outlets (4, 6) formed therein; an air passage (8) connecting the suction port (3) and the discharge ports (4, 6); a blower (10) disposed in the air passage (8); a filter (6) disposed facing the suction port (3); and a cleaning device (30) for cleaning the filter (6), the cleaning device (30) comprising: a supply roller (40) around which a sheet-like filter (6) is wound; a take-up roll (50) that takes up the filter (6); a drive motor (100) that rotationally drives the take-up roller (50); and a brush body (80) which is connected to the drive motor (100) and rotates when the take-up roller (50) rotates, and slides on the filter (6) of the take-up roller (50).

Description

Air purifier

Technical Field

The present invention relates to an air cleaner including a cleaning device for cleaning a filter.

Background

Patent document 1 discloses a conventional air cleaner. The air cleaner has a housing having an inlet and an outlet. An air passage connecting the suction port and the discharge port is provided in the case, and a blower is disposed in the air passage. A prefilter (filter) is disposed facing the suction port.

In the air cleaner having the above configuration, when the operation is started, the blower is driven to suck the air in the room through the suction port. The air sucked from the suction port is sent out from the blow port after the dust is collected by the pre-filter. This enables air cleaning in the room.

In recent years, there has been an increasing demand for an air cleaner including a cleaning device for cleaning a pre-filter. Patent document 2 discloses a cleaning device for cleaning a filter disposed facing an air inlet of a projector. The cleaning device comprises a supply roller, a take-up roller, a brush body, a motor for the supply roller, a motor for the take-up roller, a motor for the brush body, and a dust box.

A sheet-like filter is wound around the supply roller. The take-up roller is rotated by driving of a take-up roller motor, and winds up the filter drawn out from the supply roller. The brush body has bristles radially formed on the shaft, and when the winding roller is rotated, the brush body is rotated by the driving of the motor, so that the bristles rub against the filter to remove dust. The dust box collects dust removed from the filter by the brush body. The supply roller is rotationally driven by a supply roller motor to unwind the filter wound around the take-up roller. Thereby, dust on the filter is removed and the filter is cleaned.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open No. 2009-66466 (eighth page, ninth page, first figure)

Patent document 2: japanese patent laid-open No. 5627066 (sixth page, seventh page, first figure, fourth figure)

Disclosure of Invention

Technical problem to be solved by the invention

However, the cleaning device of patent document 2 includes a supply roller motor in addition to the take-up roller motor. Therefore, the number of parts of the cleaning device increases, and if the cleaning device is provided in the air cleaner, there is a problem in that the manufacturing cost of the air cleaner increases.

The invention aims to provide an air purifier which can reduce the manufacturing cost.

Means for solving the problems

In order to achieve the above object, an air cleaner according to the present invention includes: a housing provided with a suction port and a blow-out port; an air passage connecting the suction port and the discharge port; a blower disposed in the air passage; a filter disposed facing the suction port; and a cleaning device that cleans the filter, the air cleaner being characterized in that the cleaning device includes: a supply roller around which the sheet-like filter is wound; a take-up roll that winds the filter; a drive motor that rotationally drives the take-up roller; and a brush body connected to the driving motor and rotating when the winding roller rotates, and sliding on the filter of the winding roller.

In the air cleaner having the above configuration, the present invention preferably includes: the rotating direction of the winding roller and the rotating direction of the brush body are the same.

In the air cleaner having the above configuration, the present invention preferably includes: the brush body is supported on the circumferential surface of the shaft of the housing, and bristle bundles are implanted at predetermined intervals in a spiral shape, and the circumferential speed of the brush body is greater than that of the take-up roller.

In the air cleaner having the above configuration, the present invention preferably includes: the housing has: a main body part provided with the blower; and a cover portion that is detachably disposed with respect to the main body portion and has the suction port opened therein, wherein the drive motor is disposed in the main body portion, and the supply roller and the take-up roller are disposed in the cover portion.

In the air cleaner having the above configuration, the present invention preferably includes: the air cleaner is provided with: a first cross gear having a fitting hole to be fitted with a rotating shaft of the drive motor, a second cross gear to be engaged with the first cross gear, a first parallel gear to be rotated integrally with the second cross gear and connected to the take-up roller, and a second parallel gear to be engaged with the first parallel gear and connected to the brush body.

In the air cleaner having the above configuration, the present invention preferably includes: an internal gear provided integrally with the second parallel shaft gear and a third parallel shaft gear meshing with the internal gear are provided between the brush body and the second parallel shaft gear, and a rotation shaft of the brush body is disposed between a rotation shaft of the first parallel shaft gear and a rotation shaft of the second parallel shaft gear.

In the air cleaner having the above configuration, the present invention preferably includes: the filter has: a ventilation portion disposed to face the suction port when the cleaning device is stopped, and a housing portion fed out from the supply roller when the cleaning device is driven, wherein a pattern that can be visually recognized from the suction port 3 is provided on the housing portion separately from the ventilation portion.

In the air cleaner having the above configuration, the present invention preferably includes: the blower is stopped when the cleaning device is driven.

Effects of the invention

According to the present invention, the brush body of the cleaning device is connected to the drive motor that rotationally drives the take-up roller, and rotates and slides on the filter on the take-up roller when the take-up roller rotates. Thus, it is not necessary to provide a brush body motor of the conventional example for rotating the brush body in addition to the drive motor. Therefore, the manufacturing cost of the air cleaner can be reduced.

Drawings

Fig. 1 is a front view showing an air cleaner according to a first embodiment of the present invention.

Fig. 2 is a side sectional view showing an air cleaner according to a first embodiment of the present invention.

Fig. 3 is an exploded perspective view showing a cleaning device of an air cleaner according to a first embodiment of the present invention.

Fig. 4 is a plan view showing a pre-filter of an air cleaner according to a first embodiment of the present invention.

Fig. 5 is a side sectional view of a supply roller of a cleaning device of an air cleaner according to a first embodiment of the present invention.

Fig. 6 is a perspective view showing the inside of the winding roller, the dust collecting unit, and the gear unit of the cleaning device of the air cleaner according to the first embodiment of the present invention.

Fig. 7 is an enlarged perspective view of the inside of a gear unit of a cleaning device of an air cleaner according to a first embodiment of the present invention.

Fig. 8 is an exploded perspective view of a biasing portion of a cleaning device of an air cleaner according to a first embodiment of the present invention.

Fig. 9 is a side view of the support member of the cover portion of the air cleaner according to the second embodiment of the present invention before the supply roller is mounted.

Fig. 10 is a side view of the air cleaner according to the second embodiment of the present invention after the supply roller of the support member of the cover portion is mounted.

Fig. 11 is a side view of a support member of a cover portion of an air cleaner according to a third embodiment of the present invention before mounting a supply roller.

Fig. 12 is a side view of the air cleaner according to the third embodiment of the present invention after the supply roller of the support member of the cover portion is mounted.

Fig. 13 is a plan view of a pre-filter of an air cleaner according to a fourth embodiment of the present invention.

Fig. 14 is a perspective view of a pressing member of an air cleaner according to a fifth embodiment of the present invention.

Detailed Description

< first embodiment >

Embodiments of the present invention will be described below with reference to the drawings. Fig. 1 and 2 show a front view and a side sectional view of an air cleaner according to a first embodiment. Further, an arrow S indicates the flow of air. The air cleaner 1 includes a casing 2, and the casing 2 is provided on a floor surface or the like in a room with an inlet 3 and outlets 4 and 5 opened. The housing 2 includes a main body 20 and a cover 21. The cover 21 is detachably disposed on the rear surface of the body 20, and has an opening 3. The main body 20 has air outlets 4 and 5 opened in an upper front surface and an upper surface, respectively.

Air deflectors

14 and 15 for changing the direction of air flow are provided in the air outlets 4 and 5, respectively. The wind direction plate 14 is formed of a flat plate, and is supported to be rotatable in the vertical direction by a rotation shaft (not shown) provided in the wind direction plate 14. A plurality of vertical louvers 14a are provided vertically aligned in the left-right direction on the lower surface of the louver 14. The vertical louvers 14a at both side end portions are inclined outward in the left-right direction as they go forward.

The wind direction plate 15 is formed of a flat plate, and is supported by a rotation shaft portion 15b provided at a front portion of the wind direction plate 15 so as to be rotatable in the vertical direction. A plurality of vertical louvers 15a are provided vertically aligned in the left-right direction on the lower surface of the louver 15. The vertical louvers 15a at both side end portions are inclined outward in the left-right direction as they go rearward.

The

wind direction plates

14 and 15 close the air outlets 4 and 5, respectively, when the operation of the air cleaner 1 is stopped, and open the air outlets 4 and 5 during the operation.

An air passage 8 connecting the suction port 3 and the discharge ports 4 and 5 is provided in the casing 2. In the air passage 8, a pre-filter 6 (filter), a deodorizing filter 7, a dust collecting filter 9, a humidifying unit 200, a blower 10, an ion generating device 11, and a damper 12 are provided in this order from the intake port 3 toward the outlet ports 4, 5 (from the upstream to the downstream of the air flow).

The air passage 8 has: a first branch passage 8a and a second branch passage 8b branched downstream of the ion generating device 11. The first branch passage 8a and the second branch passage 8b communicate with the air outlets 4 and 5, respectively, and the cross-sectional area of the air flow path of the first branch passage 8a is smaller than the cross-sectional area of the air flow path of the second branch passage 8 b.

The damper 12 is formed in a thin plate shape, and is supported rotatably in the vertical direction by the rotating shaft portion 12 a. The damper 12 is rotatable in an opening direction (counterclockwise in fig. 2) from a position (see fig. 2) at which the first branch passage 8a is closed. The air volume balance between the first branch passage 8a and the second branch passage 8b is variable by the damper 12.

The blower 10 is formed of a centrifugal fan such as a sirocco fan driven by a motor 10a, and sucks air in the axial direction and exhausts the air in the circumferential direction.

The prefilter 6 is formed of sheet-like meshes of polypropylene or the like, and is disposed in the cover 21 so as to face the suction port 3. Larger dust in the intake air can be collected by the pre-filter 6.

The deodorizing filter 7 is formed in a honeycomb shape, and can adsorb odor components in the air to deodorize the air.

The dust collecting filter 9 is composed of a HEPA filter, and a frame member (not shown) is welded with hot melt adhesive so as to cover a filter medium (not shown). The dust collecting filter 9 can collect fine particles such as fine dust in the air and PM2.5 having a particle diameter smaller than a predetermined particle diameter (for example, 3 μm).

The humidifying unit 200 immerses the lower portion of the humidifying filter 202 in water in the tray 201, and humidifies the air passing through the humidifying filter 202. This causes humidified air to be sent out from the air outlets 4 and 5.

The ion generating device 11 has an ion generating surface 11a that generates ions by application of a high voltage, and the ion generating surface 11a faces the inside of the air passage 8. A voltage having an ac waveform or a pulse waveform is applied to the ion generating surface 11 a. When the voltage applied to the ion generating surface 11a is positive, a positive voltage mainly consisting of H + (H) is generated₂O) m, and mainly generates O when the positive ion is negative₂-(H₂O) n. Here, m and n are integers. H + (H)₂O) m and O₂-(H₂O) n is a substance that aggregates floating bacteria and odor components in the air on the surface thereof to surround them.

Further, as shown in the formulas (1) to (3), [. OH ] as an active species is aggregated and generated on the surface of a microorganism or the like by collision](hydroxyl radical), H₂O₂(hydrogen peroxide) to destroy floating bacteria and the like. Here, m 'and n' are integers. Therefore, the positive ions and the negative ions are generated and sent out from the air outlets 4 and 5, and thereby the bacteria can be removed and the odor can be removed from the room.

H+(H₂O)m+O₂-(H₂O)n→·OH+1/2O₂+(m+n)H₂O…(1)

H+(H₂O)m+H+(H₂O)m’+O₂-(H₂O)n+O₂-(H₂O)n’→2·OH+O₂+(m+m'+n+n')H₂O…(2)

H+(H₂O)m+H+(H₂O)m’+O₂-(H₂O)n+O₂-(H₂O)n’→H₂O₂+O₂+(m+m'+n+n')H₂O…(3)

An operation unit 19 is provided in front of the upper surface of the main body 20. The operation unit 19 has a plurality of buttons (not shown), and sets the operation of the air cleaner 1 by the operation of the user. By operating the respective buttons, the air volume of the air sent out from the air outlets 4 and 5, the air blowing direction, and the like can be changed.

In addition, a cleaning device 30 for cleaning the pre-filter 6 is provided in the cover 21. Fig. 3 shows an exploded perspective view of the cleaning device 30. The cleaning device 30 includes a supply roller 40, a take-up roller 50, a gear unit 60, an urging portion 70, a brush body 80, a dust collecting portion 90, and a drive motor 100 (see fig. 2).

The supply roller 40 and the take-up roller 50 are disposed above and below the cover 21, respectively, and hold both ends of the pre-filter 6. The prefilter 6 is wound around the supply roller 40 when the cleaning device 30 is stopped, and is fed out from the supply roller 40 and wound around the winding roller 50 when the cleaning device 30 is driven.

The supply roller 40 has a shaft 41 extending in the left-right direction, and caps 48 are fitted over both ends of the shaft 41. The cap 48 is rotatably supported by a support member 49 disposed at an upper end portion of the inner surface of the cover 21. Thus, the supply roller 40 is disposed to be rotatable by a rotation shaft extending in the left-right direction. One end (right end) of the supply roller 40 is connected to the biasing portion 70 via the cap 48.

The winding roller 50 has a shaft 51 extending in the left-right direction, and caps 58 are fitted over both ends of the shaft 51. The left and right caps 58 are rotatably supported by a support member 59 and a gear unit 60, respectively, which are disposed at the lower end portion of the inner surface of the cover portion 21. Thus, the winding roller 50 is disposed to be rotatable by a rotation shaft extending in the left-right direction.

Fig. 4 shows a top view of the pre-filter 6. The prefilter 6 has, at both ends in the winding direction W: and a rod member 6a extending in the left-right direction and held by the supply roller 40 and the take-up roller 50. The prefilter 6 further includes: a ventilation portion 6b disposed to face the suction port 3 when the cleaning device 30 is stopped, and a housing portion 6c fed out from the supply roller 40 when the cleaning device 30 is driven.

The housing portion 6c is provided with a pattern 6g that is visually recognizable from the suction port 3, separately from the ventilation portion 6 b. In the present embodiment, a "cleaning" red character is used as the pattern 6 g. The pattern 6g is not particularly limited, and may be, for example, a stripe pattern having a different color from the vent portion 6 b.

Fig. 5 shows a side sectional view of the supply roller 40. Since the configuration of the winding roller 50 is the same as that of the supply roller 40, the supply roller 40 will be described as a representative example. The shaft 41 forming the shaft portion of the supply roller 40 includes a core 41a and a sleeve 41 d.

The core member 41a is formed of an extrusion-molded product of metal such as aluminum having a C-shaped cross section, and has a groove portion 41b extending in the axial direction on the peripheral surface. The opposing inner wall surfaces 41c of the groove portion 41b are inclined, and the circumferential width of the groove portion 41b is wider on the outer periphery side than on the inner periphery side. The circumferential surface of the rod 6a of the prefilter 6 is supported by the inner wall surface 41c of the groove portion 41 b.

The sleeve 41d is formed of a resin molded product having a C-shaped cross section and having an opening 41e extending in the axial direction, and is externally fitted to the core 41 a. The prefilter 6 supporting the rod 6a in the groove 41b is inserted into the opening 41 e. The width of the opening 41e of the sleeve 41d is smaller than the diameter of the rod 6a, and the rod 6a supported by the core 41a is prevented from falling off. At this time, both circumferential end portions of the sleeve 41d elastically press the rod 6a, and the rod 6a is elastically sandwiched by the groove portion 41b of the core 41a and the sleeve 41 d.

Further, when a force is applied in a direction (left-right direction in fig. 5) to expand the opening 41e of the sleeve 41d, the sleeve 41d is elastically deformed. The rod 6a of the pre-filter 6 can be attached to and detached from the shaft 41 through the expanded opening 41 e. Similarly, the rod 6a at the lower end of the pre-filter 6 can be attached to and detached from the shaft 51. This makes it possible to easily remove the pre-filter 6 from the cleaning device 30 and replace the pre-filter 6.

In fig. 3, the brush body 80 is disposed in a dust collecting part 90 detachably attached to the cover part 21. The brush 80 has a shaft 81 for supporting both ends in the axial direction in the dust collecting section 90, and rotates when the cleaning device 30 is driven as described later to remove dust on the pre-filter 6. A spur gear 68 is provided at one end (right end) of the shaft 81, and bristle bundles 82 are implanted spirally at predetermined intervals on the circumferential surface of the shaft 81.

The dust collecting part 90 includes a cover 91, a container 92, and a comb-like part 93, and is detachably disposed with respect to the cover part 21. The container 92 is made of transparent resin, and has an open top surface to support the brush body 80 on both sides. The lid 91 has an opening 91a that opens across the left and right ends and covers the upper surface of the container 92. The brush body 80 has the bundle of bristles 82 exposed to the outside through the opening 91 a. The comb 93 extends in the left-right direction and is disposed in the container 92 with the tooth tips facing upward. The bristle bundles 82 of the rotating brush body 80 abut against the tooth tips of the comb-like portion 93. The dust adhering to the bundle of bristles 82 is removed from the bundle of bristles 82 by the comb 93.

The dust removed from the pre-filter 6 by the brush body 80 and the dust removed from the brush body 80 by the comb 93 are left in the container 92. At this time, since the container 92 is formed of a transparent resin, the user can easily grasp the amount of dust in the container 92.

The drive motor 100 (see fig. 2) is disposed in the main body portion 20 of the housing 2, and a rotary shaft (not shown) of the drive motor 100 protrudes rearward from the rear surface of the main body portion 20.

Further, a pressing member 22 is disposed in front of the pre-filter 6 with a predetermined gap. The pressing member 22 is detachably attached to the cover 21. The pressing member 22 has a rectangular frame 22a formed of synthetic resin such as ABS. The frame 22a includes a rib 22b extending in the vertical direction and a plurality of (three in the present embodiment) ribs 22c extending in the left-right direction and arranged in parallel in the vertical direction. Thus, the pressing member 22 has a plurality of layers and rows of windows. The pressing member 22 stably positions the pre-filter 6 along the suction port 3, thereby preventing the pre-filter 6 from loosening due to the suction airflow.

A magnet 23 is provided at the center of the right end of the frame 22a of the pressing member 22. A hall element (not shown) is provided at a position of the main body portion 20 facing the magnet 23. The air cleaner 1 can determine whether or not the cover 21 is attached to the main body 20 by the hall element. When determining that cover 21 is not attached to main body 20, air cleaner 1 prohibits operation of blower 10. This can avoid the blowing operation of the air cleaner 1 in a state where the cover 21 is not attached to the main body 20.

Further, gear unit 60 and biasing unit 70 are disposed at one end (right end) of cover 21. Therefore, a space SP is formed on the inner surface of the cover portion 21 between the gear unit 60 and the biasing portion 70. A belt member 300 in which information on the operation of the air cleaner 1 is described is attached to the space SP. The information includes information on a method of removing the pre-filter 6 from the cleaning device 30 and information on a method of operating the handle 73 of the urging unit 70, which will be described later.

Thus, the user can easily recognize the method of removing the pre-filter 6 from the cleaning device 30 and the method of operating the handle 73 of the biasing portion 70 by visually recognizing the information when removing the cover portion 21 from the main body portion 20. Therefore, the convenience of the air cleaner 1 can be improved.

Fig. 6 is a perspective view showing the inside of the winding roller 50, the dust collecting section 90, and the gear unit 60 of the cleaning device 30. Fig. 7 is an enlarged perspective view of the inside of the gear unit 60. The gear unit 60 includes a bevel gear 61 (first cross gear), a bevel gear 62 (second cross gear), a spur gear 63 (first parallel gear), a spur gear 64 (second parallel gear), an internal gear 65, a spur gear 66, and a spur gear 67 in a housing 60a (see fig. 3). The housing 60a is screwed to the cover 21 (see fig. 3).

The bevel gear 61 is disposed with its axial direction extending in the front-rear direction, and has a fitting hole 61a on its shaft that fits into a rotary shaft (not shown) of the drive motor 100 (see fig. 2). The bevel gear 62 is disposed in the left-right direction in the axial direction and meshes with the bevel gear 61. The spur gear 63 is formed concentrically with the bevel gear 62.

The shaft portion 63a of the spur gear 63 has a fitting hole (not shown) into which the convex portion 58a (see fig. 3) of the cap 58 is fitted. Thereby, the spur gear 63 and the bevel gear 62 are connected to the take-up roller 50.

The spur gear 64 is disposed below the spur gear 63 and meshes with the spur gear 63. The internal gear 65 is provided integrally with the spur gear 64. The spur gear 66 meshes with the internal gear 65. The spur gear 67 is formed concentrically and integrally with the spur gear 66. The spur gear 68 provided at one end of the brush body 80 is engaged with the spur gear 67.

The winding roller 50 is rotated by the drive of the drive motor 100 via the bevel gears 61 and 62. Further, by the rotation of the spur gear 63 integrated with the bevel gear 62, the brush body 80 is rotated via the spur gear 64, the internal gear 65, the spur gear 66, the spur gear 67, and the spur gear 68. Since the spur gear 63 integrated with the bevel gear 62 is engaged with the spur gear 64 connected to the brush body 80, the brush body 80 arranged in parallel with the take-up roller 50 can be easily rotated.

At this time, since the internal gear 65 integrated with the spur gear 64 is provided, the spur gear 68 on the rotation shaft of the brush body 80 can be disposed between the rotation shaft (the shaft portion 63a) of the spur gear 63 and the rotation shaft of the spur gear 64. Thereby, the brush 80 sliding on the pre-filter 6 on the winding roller 50 can be easily disposed close to the winding roller 50.

The bevel gears 61 and 62 may be cross gears. Further, each spur gear may be a parallel axis gear, and a helical gear or the like may be used.

Fig. 8 is an exploded perspective view of the biasing portion 70 of the cleaning device 30. The urging portion 70 includes: a rotor 71 (first rotor) and a rotor 72 (second rotor) housed in

housings

78, 79 screwed to each other. A grip portion 71a is provided to protrude from one end surface of the rotating body 71 in the axial direction, and a groove portion 71b is provided on the other end surface. The locking portion 48a provided on the cap 48 is fitted in the groove portion 71 b. Thereby, the rotary body 71 locks the shaft portion of the supply roller 40, and the supply roller 40 is connected to the biasing portion 70.

The rotor 72 houses a coil spring 75 inside the rotor 71. One end (inner end) of the coil spring 75 is held by the holding portion 71a of the rotating body 71, and the other end (outer end) is attached to the inner peripheral surface of the rotating body 72. When the rotor 71 rotates clockwise with respect to the rotor 72 as viewed from the right side (as viewed from the arrow a direction), the biasing force of the coil spring 75 increases. That is, when the rotating body 72 rotates clockwise with respect to the rotating body 71 as viewed in the direction of the arrow a, the biasing force of the coil spring 75 decreases.

A plurality of claws 72a are provided at predetermined intervals on the outer circumferential surface on the outer side (right side) in the axial direction of the rotating body 72. A stopper 77 is supported inside the housing 78, and the stopper 77 is biased by a torsion coil spring 77a in a direction of pressing the rotating body 72. Thus, the rotation body 72 is restricted from rotating clockwise when viewed from the direction of arrow a so that the biasing force of the coil spring 75 is reduced by the engagement of the stopper 77 with the pawl 72 a.

An opening 78a is opened on the right side surface of the housing 78, and a cylindrical handle 73 is disposed so as to cover the opening 78 a. A flange portion 73a having a diameter larger than that of the opening portion 78a is disposed in the housing 78. The handle 73 and the flange 73a are screwed to the outer wall of the housing 78 with a predetermined gap therebetween in the axial direction. Thus, the handle 73 is rotatably attached to the housing 78.

A connection member 74 is disposed inside the housing 78 and on the inner side (left side) in the axial direction of the flange portion 73 a. A compression spring 76 is disposed between the rotary body 72 and the connection member 74 to bias the connection member 74 outward (rightward) in the axial direction. A plurality of notches 74c are formed at predetermined intervals on the circumferential surface of the connecting member 74. A plurality of ribs 72c extending radially and fitted into the notches 74c are formed at the axial outer end of the rotating body 72. Thereby, the connecting member 74 rotates integrally with the rotating body 72.

The connecting member 74 is formed to have a larger diameter than the flange portion 73a and the opening portion 78 a. A plurality of inclined portions 74a and a plurality of ribs 74b are provided at predetermined intervals on the outer (right) surface of the connection member 74 in the axial direction. The inclined portion 74a is formed to become gradually higher around the counterclockwise direction as viewed from the arrow a direction. The rib 74b is formed to extend in a radial shape adjacent to the top of the inclined portion 74a and to be higher than the top.

Further, a plurality of ribs 73b extending radially and engaging with the ribs 74b are provided on an inner surface (left side surface) in the axial direction of the flange portion 73 a. A projection (not shown) that engages with the rib 74b is provided on the inner wall surface of the housing 78.

When the handle 73 is rotated clockwise as viewed in the direction of arrow a, the rib 74b engages with the rib 73b and with the projection of the housing 78. Thereby, the rotation of the handle 73 is restricted.

On the other hand, when the handle 73 is rotated counterclockwise as viewed from the arrow a direction, the rib 73b slides on the inclined portion 74 a. Therefore, the connecting member 74 moves axially inward against the urging force of the compression spring 76, and the rib 74b moves axially away from the protruding portion of the housing 78. As a result, the handle 73 can be rotated, the rib 74b engages with the rib 73b, and the rotating body 72 can be rotated in a direction to increase the biasing force of the coil spring 75. That is, the rotary body 72 is rotated by the handle 73.

In the air cleaner 1 configured as described above, when the operation is started by the operation of the operation unit 19, it is determined whether or not the cover 21 is attached to the main body 20. When it is determined that cover 21 is attached to main body 20, blower 10 and ion generating device 11 are driven. Thereby, the air in the room is sucked through the suction port 3 and flows through the air passage 8. At this time, the large dust in the air is collected by the pre-filter 6. The air is deodorized by the deodorizing filter 7, and fine dust, fine particles of PM2.5, and the like in the air are collected by the dust collecting filter 9.

Further, the ions generated by the ion generator 11 are contained in the air. Air containing ions is blown out from one or both of the air outlets 4 and 5 into the living room. This causes the air cleaner 1 to perform an air blowing operation, thereby cleaning the air in the room.

Next, the operation of the cleaning device 30 will be described. When the predetermined time is reached, the cleaning device 30 is driven to start the cleaning operation by the cleaning device 30. The cleaning operation is started, for example, when the cumulative operation time of the air cleaner 1 within a predetermined period exceeds a predetermined time. When the cleaning device 30 is driven, the blower 10 is stopped.

When the cleaning device 30 is driven, the drive motor 100 rotates, and the bevel gear 61 (see fig. 6 and 7) rotates counterclockwise when viewed from the front. The bevel gear 62 and the spur gear 63 rotate clockwise when viewed from the right side (when viewed from the direction of arrow a). Thereby, the take-up roller 50 rotates clockwise as viewed from the right side, and draws out and winds the prefilter 6 from the supply roller 40.

The spur gear 64, the internal gear 65, the spur gear 66, and the spur gear 67 rotate counterclockwise when viewed from the right side, and the spur gear 68 rotates clockwise when viewed from the right side. Thereby, the brush body 80 rotates clockwise as viewed from the right side. At this time, the bundle of bristles 82 of the brush body 80 slides on the pre-filter 6 on the take-up roller 50. Thereby, the dust on the pre-filter 6 is removed, and the dust is collected in the container 92.

At this time, the rotation direction of the take-up roller 50 and the rotation direction of the brush body 80 are the same. Therefore, the bundle of bristles 82 of the brush body 80 slides on the pre-filter 6 from the direction opposite to the traveling direction of the pre-filter 6. Therefore, the brush body 80 can reliably remove the dust on the pre-filter 6.

Preferably, the peripheral speed of the brush body 80 is greater than the peripheral speed of the take-up roller 50. Thus, the contact length of the bristle bundles 82 in the circumferential direction on the pre-filter 6 is made longer than the period of contact of the bristle bundles 82, and the bristle bundles 82 can be brought into contact with the pre-filter 6 without any gap.

The bristle bundles 82 on the rotating shaft 81 are combed by the comb 93, so that dust attached to the bristle bundles 82 falls into the container 92.

When the prefilter 6 is wound around the winding roller 50, the rotary body 71 (see fig. 8) of the biasing unit 70 connected to the supply roller 40 rotates clockwise when viewed from the right side (when viewed from the direction of arrow a). Thereby, the coil spring 75 is wound, and the biasing force of the coil spring 75 increases.

At this time, the pattern 6g (see fig. 4) on the housing portion 6c of the pre-filter 6 moves downward and is visually recognized through the suction port 3. This allows the user to easily recognize that the cleaning device 30 is being driven. Therefore, it is possible to prevent the user from mistakenly recognizing that blower 10 is stopped due to a failure. Further, the blower 10 may be operated at a low speed when the cleaning device 30 is driven.

When the rotation amount of the drive motor 100 reaches a predetermined value, the drive motor 100 is reversely rotated. Thereby, the bevel gear 61 rotates in the opposite direction to the winding time (clockwise direction in the present embodiment). At this time, the winding roller 50 and the brush body 80 rotate counterclockwise when viewed from the right side.

At the end of winding of the pre-filter 6 by the winding roller 50, the urging force of the coil spring 75 is larger than that before winding. Therefore, when the drive motor 100 is reversely rotated, the rotator 71 rotates counterclockwise as viewed from the right side due to the restoring force of the coil spring 75. Thereby, the prefilter 6 is wound around the feed roller 40.

When the rotation amount of the drive motor 100 reaches a predetermined value, the drive motor 100 is stopped. As described above, the cleaning operation by the cleaning device 30 is ended.

Further, a sensor for detecting the outer diameter of the winding roller 50 may be provided. This makes it possible to reverse the drive motor 100 by detecting that the outer diameter of the winding roller 50 around which the prefilter 6 is wound is larger than a predetermined outer diameter. Further, it is possible to detect that the outer diameter of the winding roller 50 is smaller than a predetermined outer diameter and stop the drive motor 100.

After the cleaning operation by the cleaning device 30 is completed, the user can remove the dust collecting part 90 from the cover part 21 and discard the dust remaining in the container 92.

In addition, the feed roller 40 to which one end of the pre-filter 6 is attached to the cover 21 at the time of replacement of the pre-filter 6. The lower end of the prefilter 6 is attached to the take-up roll 50.

At this time, the prefilter 6 may be loosened between the supply roller 40 and the take-up roller 50. In this case, when the user rotates the handle 73 of the biasing portion 70 counterclockwise as viewed from the right side (as viewed from the arrow a direction), the rotating

bodies

71 and 72 rotate counterclockwise as viewed from the right side. Thereby, the prefilter 6 is wound around the feed roller 40, and the looseness of the prefilter 6 can be eliminated. Therefore, when the blower 10 is driven, the air sucked from the suction port 3 can be reliably passed through the pre-filter 6.

The brush 80 is connected to a drive motor 100 that rotationally drives the winding roller 50, and rotates when the winding roller 50 rotates and slides on the pre-filter 6 (filter) on the winding roller 50. This eliminates the need to provide a brush motor of the conventional example for rotating the brush 80 in addition to the drive motor 100. Therefore, the manufacturing cost of the air cleaner 1 can be further reduced.

The rotation direction of the take-up roller 50 is the same as the rotation direction of the brush body 80. Thereby, the brush body 80 slides on the pre-filter 6 from the direction opposite to the traveling direction of the pre-filter 6. Therefore, the brush body 80 can reliably remove the dust on the pre-filter 6.

Preferably, the peripheral speed of the brush body 80 is greater than the peripheral speed of the take-up roller 50. Thus, the contact length of the bristle bundles 82 in the circumferential direction on the pre-filter 6 is made longer than the period of contact of the bristle bundles 82, and the bristle bundles 82 can be brought into contact with the pre-filter 6 without any gap. Therefore, the dust on the pre-filter 6 can be removed more reliably.

The drive motor 100 is disposed in the main body 20 of the casing 2, and the supply roller 40 and the take-up roller 50 are disposed in the cover 21. This enables the cover 21 to be removed from the main body 20 and the prefilter 6 to be easily replaced. Further, although the air cleaner 1 is provided with the cleaning device 30, the pre-filter 6 may be clogged due to the installation place of the air cleaner 1 (for example, a place with a lot of oil stains such as a kitchen). In this case, the pre-filter 6 can be easily removed and cleaned finely.

Further, the apparatus comprises: a bevel gear 61 (first cross gear) having a fitting hole 61a to be fitted to the rotation shaft of the drive motor 100, a bevel gear 62 (second cross gear) to be engaged with the bevel gear 61, a spur gear 63 (first parallel gear) to be rotated integrally with the bevel gear 62 and connected to the take-up roller 50, and a spur gear 64 (second parallel gear) to be engaged with the spur gear 63 and connected to the brush body 80. This makes it possible to easily rotate the winding roller 50 and the brush body 80 by one drive motor 100.

Further, the spur gear 63 connected to the take-up roller 50 is disposed on the drive motor 100 side of the spur gear 64 connected to the brush body 80, and the attenuation of the drive force transmitted to the take-up roller 50 can be suppressed. This enables the winding roller 50 biased by the biasing unit 70 via the pre-filter 6 to be reliably rotationally driven by the drive motor 100 against the biasing force.

The brush body 80 and the spur gear 64 are provided with an internal gear 65 provided integrally with the spur gear 64 and a spur gear 66 (third parallel shaft gear) meshing with the internal gear 65, and the rotation shaft of the brush body 80 is arranged between the rotation shaft of the spur gear 63 and the rotation shaft of the spur gear 64. Thereby, the brush 80 sliding on the pre-filter 6 on the winding roller 50 can be easily disposed close to the winding roller 50.

The prefilter 6 further includes: a ventilation portion 6b disposed facing the suction port 3 when the cleaning device 30 is stopped, and a housing portion 6c fed out from the supply roller 40 when the cleaning device 30 is driven. The housing portion 6c is provided with a pattern 6g that is visually recognizable from the suction port 3, separately from the ventilation portion 6 b. This makes it easy to visually recognize the movement of the pre-filter 6, and the user can easily recognize the cleaning of the pre-filter 6 by the cleaning device 30.

Further, the blower 10 is stopped when the cleaning device 30 is driven. This can prevent dust immediately after being removed from the pre-filter 6 from being sucked into the downstream side of the pre-filter 6. In addition, the pattern 6g can prevent the user from mistakenly recognizing that the blower 10 is stopped due to a failure.

Further, the urging portion 70 of the cleaning device 30 includes: and a coil spring 75 for biasing the rotational shaft of the supply roller 40 in the opposite direction to the winding direction when the pre-filter 6 is wound on the winding roller 50. Thus, when the drive motor 100 is reversed after the winding of the winding roller 50 is completed, the prefilter 6 is wound around the supply roller 40 by the restoring force of the coil spring 75. Therefore, it is not necessary to provide a motor for rotating the supply roller 40 in the direction opposite to the winding direction W of the winding roller 50 in addition to the driving motor 100. As a result, the manufacturing cost of the air cleaner 1 can be reduced. Further, since the coil spring 75 is used, the prefilter 6 can be wound around the winding roller 50 over a long distance while being biased. This can improve the degree of freedom in designing the size of the prefilter 6.

Further, the urging portion 70 includes: a rotating body 71 (first rotating body) to which one end of a coil spring 75 is attached by locking the shaft portion of the supply roller 40; a rotating body 72 (second rotating body) to which the other end of the coil spring 75 is attached and which is restricted from rotating in a direction in which the urging force of the coil spring 75 is reduced; and a handle 73 for rotating the rotating body 72. Thus, when the supply roller 40 is attached to the cover 21 and the handle 73 is operated, the prefilter 6 is wound in the direction opposite to the winding direction W. Therefore, the loosening of the pre-filter 6 is reduced, and the air containing dust can reliably pass through the pre-filter 6.

The urging unit 70 further includes: the connecting member 74 is disposed between the handle 73 and the rotating body 72 and regulates the rotation of the handle 73 in a direction to reduce the biasing force of the coil spring 75, and the connecting member 74 rotates integrally with the rotating body 72. This can reliably prevent the rotation of the rotating body 72 in the direction to reduce the biasing force of the coil spring 75.

Further, the shaft 41 of the supply roller 40 includes: the rod member 6a of the pre-filter 6 is elastically sandwiched by the sleeve 41d and the groove portion 41 b. Thus, when the opening 41e of the sleeve 41d is expanded, the rod 6a can be easily removed from the shaft 41. Further, the sleeve 41d can prevent the rod 6a from falling off the shaft 41. The same applies to the take-up roller 50.

The core 41a of the supply roller 40 is made of metal, and the sleeve 41d is made of a resin molded product. The same applies to the take-up roller 50. This makes it possible to easily attach and detach the rod 6a to and from the

shafts

41 and 51 while sufficiently securing the strength of the

shafts

41 and 51.

< second embodiment >

Next, embodiment 2 of the present invention will be explained. Fig. 9 is a side view of a support member of a cover portion of an air cleaner according to the present embodiment. For convenience of explanation, the same reference numerals are given to the same parts as those of the first embodiment shown in fig. 1 to 8. In the present embodiment, the structure of the support member 49 of the cover 21 is different from that of the first embodiment. The other portions are the same as those of the first embodiment.

A resin rotating plate 400 that rotates in the vertical direction is provided at the front end of the right support member 49 (see fig. 3) of the supply roller 40 of the cover 21. The shaft portion 401 of the rotating plate 400 is disposed rearward of the center of the rotating plate 400 in the front-rear direction. Thus, as shown in fig. 9, when the supply roller 40 is not attached to the support member 49, the front end portion of the rotating plate 400 protrudes forward from the support member 49. Therefore, when the cover portion 21 is to be attached to the main body portion 20 in a state where the supply roller 40 is not attached to the cover portion 21, the distal end portion of the rotating plate 400 interferes with the main body portion 20. Therefore, forgetting to mount the supply roller 40 to the cover 21 can be easily prevented.

On the other hand, as shown in fig. 10, when the supply roller 40 is attached to the support member 49, the supply roller 40 collides with the rear end portion of the rotating plate 400, and the rotating plate 400 rotates upward. This allows the front end of the rotating plate 400 to retreat rearward, thereby preventing interference between the rotating plate 400 and the main body 20 when the cover 21 is attached to the main body 20.

The present embodiment can also obtain the same effects as the first embodiment.

< third embodiment >

Next, embodiment 3 of the present invention will be explained. Fig. 11 is a side view of a support member of a cover portion of an air cleaner according to the present embodiment. For convenience of explanation, the same reference numerals are given to the same parts as those of the first embodiment shown in fig. 1 to 8. In the present embodiment, the structure of the support member 49 of the cover 21 is different from that of the first embodiment. The other portions are the same as those of the first embodiment.

The support member 49 has a fixed portion 49a and a moving portion 49 b. A spring 49c is provided at the rear end of the moving portion 49b, and one end of the spring 49c is attached to the front surface of the cover 21. In this case, the structure is: the front end of the moving part 49b protrudes forward from the fixed part 49a in a state where the spring 49c is stretched. Thus, as shown in fig. 11, when the supply roller 40 is not attached to the support member 49, the distal end portion of the moving portion 49b protrudes forward from the fixed portion 49 a. Therefore, when the cover portion 21 is to be attached to the main body portion 20 in a state where the supply roller 40 is not attached to the cover portion 21, the distal end portion of the moving portion 49b interferes with the main body portion 20. Therefore, forgetting to mount the supply roller 40 to the cover 21 can be easily prevented.

On the other hand, as shown in fig. 12, when the supply roller 40 is attached to the support member 49, the supply roller 40 abutting on the fixed portion 49a moves the moving portion 49b rearward. This allows the front end of the moving portion 49b to retreat rearward, thereby preventing the moving portion 49b from interfering with the main body 20 when the cover 21 is attached to the main body 20.

In the second and third embodiments, a photo interrupter (not shown) may be provided instead of the magnet 23 and the hall element in the first embodiment. The photo interrupter includes a light emitting portion and a light receiving portion that face each other. When the light receiving unit detects that light from the light emitting unit toward the light receiving unit is blocked by the rotating plate 400 of the second embodiment and the moving unit 49b of the third embodiment, which protrude forward from the support member 49, the driving of the blower 10 is prohibited. This can prevent the blowing operation of the air cleaner 1 in a state where the cover 21 is not attached to the main body 20.

< fourth embodiment >

Next, embodiment 4 of the present invention will be explained. Fig. 13 is a plan view of a pre-filter of an air cleaner according to the present embodiment. For convenience of explanation, the same reference numerals are given to the same parts as those of the first embodiment shown in fig. 1 to 8. The structure of the pre-filter 6 in the present embodiment is different from that in the first embodiment. The other portions are the same as those of the first embodiment.

The sheet-like pre-filter 6 is formed with first to fourth regions a1 to a4 arranged in the winding direction W. The first region a1 is a region with a low mesh density, the second region a2 is a region with a high mesh density, the third region A3 is a region with activated carbon adhered to the mesh, and the fourth region a4 is a region with fragrance adhered to the mesh.

The air cleaner 1 includes a dust sensor (not shown) and an odor sensor (not shown). The dust sensor detects the dust concentration in the air in the room. The odor sensor detects the concentration of an odor component in the air in a living room.

In the air cleaner 1 configured as described above, for example, when it is determined from the detection result of the dust sensor that the dust concentration in the air is low, the drive motor 100 is driven, the take-up roller 50 is rotated, and the first region a1 is disposed facing the suction port 3. This can improve the air blowing efficiency of the air cleaner 1. For example, when it is determined from the detection result of the dust sensor that the dust concentration in the air is high, the drive motor 100 is driven to rotate the winding roller 50, and the second region a2 is disposed facing the suction port 3. The area disposed facing the suction port 3 can be determined based on the length of the first to fourth areas a1 to a4 in the winding direction W and the amount of rotation of the drive motor 100.

When it is determined from the detection result of the odor sensor that the concentration of the odor component in the air is high, the winding roller 50 is rotated by driving the drive motor 100, and the third area A3 or the fourth area a4 is disposed facing the suction port 3.

Accordingly, the area of the pre-filter 6 suitable for the state of the air in the room is disposed facing the suction port 3, and therefore, the usability of the air cleaner 1 can be improved.

The present embodiment can also obtain the same effects as the first embodiment. The prefilter 6 is formed with first to fourth regions a1 to a4 arranged in the winding direction W. Accordingly, the area of the pre-filter 6 suitable for the state of the air in the room is disposed facing the suction port 3, and therefore, the usability of the air cleaner 1 can be improved.

The user may operate the operation unit 19 to select the first to fourth regions a1 to a 4.

< fifth embodiment >

Next, embodiment 5 of the present invention will be explained. Fig. 14 is a perspective view of a pressing member of the pre-filter of the air cleaner according to the present embodiment. For convenience of explanation, the same reference numerals are given to the same parts as those of the first embodiment shown in fig. 1 to 8. The present embodiment differs from the first embodiment in the structure of the pressing member 22. The other portions are the same as those of the first embodiment.

The pressing member 22 of the present embodiment has only the rib 22b extending in the winding direction W (vertical direction in the present embodiment) of the pre-filter 6, and does not have a rib extending in a direction (horizontal direction in the present embodiment) orthogonal to the winding direction W. This can prevent dust from falling down due to sliding of the rib extending in the direction orthogonal to the winding direction W on the pre-filter 6.

In the first to fifth embodiments, the supply roller 40 and the take-up roller 50 are disposed in the cover portion 21, but may be disposed in the main body portion 20 instead.

In the cleaning operation of the air cleaner 1 according to the first to fifth embodiments, the winding speed of the winding roller 50 and the unwinding speed of the supply roller 40 may be the same or different. For example, if the winding speed of the winding roller 50 is set to be lower than the unwinding speed of the supply roller 40, the unwinding speed can be increased while removing dust on the pre-filter 6, and the time for the cleaning operation can be shortened.

Industrial applicability of the invention

The present invention can be used in an air cleaner including a cleaning device for cleaning a filter.

Description of the reference numerals

1, an air purifier; 2, a shell; 3, a suction inlet; 4. 5 an air outlet; 6 prefilter (filter); 6a rod member; 6b a ventilation part; 6c a storage section; 6g of pattern; 7a deodorizing filter; 8 an air passage; 8a first branch path; 8b a second branch path; 9a dust collecting filter; 10 blower; 11 an ion generating device; 12 windshields; 14. 15 wind direction plates; 20 a main body portion; 21 a cover part; 22a pressing member; 23 a magnet; 30 a cleaning device; 40 a supply roller; 41 shafts; 41a core material; 41d a sleeve; 50 take-up rolls; 60a gear unit; bevel gear 61 (first cross gear); 62 bevel gears (second cross-shaft gears); 63 spur gears (first parallel axis gears); 64 spur gears (second parallel axis gears); 65 internal gear; 66 spur gears (third parallel axis gears); 70 force application part; 71a rotating body (first rotating body); 71a clamping part; 72a rotating body (second rotating body); 72a, a claw; 73a handle; 74a connecting member; 75 a coil spring; 76 compression spring; 77a limiter; 77a torsion coil spring; 78. 79 housing; 80 a brush body; an 81-axis; 82 bristle bundles; 90 a dust collecting part; 91a cover part; 91a opening part; 92 a container; 93 a comb-shaped portion; 100 driving motor; 200 a humidifying part; 201 a tray; 202 a humidifying filter; 300 a band-shaped member; 400 rotating the plate; 401 a shaft portion; the SP space.

Claims

1. An air cleaner is provided with: a housing provided with a suction port and a blow-out port; an air passage connecting the suction port and the discharge port; a blower disposed in the air passage; a filter disposed facing the suction port; and a cleaning device for cleaning the filter, characterized in that,

the cleaning device has: a supply roller around which the sheet-like filter is wound; a take-up roll that winds the filter; a drive motor that rotationally drives the take-up roller; a brush body connected to the driving motor and sliding on the filter of the take-up roller while rotating when the take-up roller rotates;

the housing has: a main body part provided with the blower; and a cover portion that is detachably disposed with respect to the main body portion and has the suction port opened therein, the drive motor being disposed in the main body portion, and the supply roller and the take-up roller being disposed in the cover portion; and is

The cover portion has: a support member supporting the supply roller and having a rotation plate at a front end thereof to rotate in an up-down direction;

the shaft portion of the rotating plate is disposed at a position closer to the rear than the center of the rotating plate in the front-rear direction.

2. The air cleaner according to claim 1, wherein a rotation direction of the take-up roller is the same direction as a rotation direction of the brush body.

3. The air cleaner according to claim 2, wherein the brush body is supported by a shaft of the housing, and bristle bundles are implanted at predetermined intervals in a spiral shape on a circumferential surface of the shaft, and a circumferential speed of the brush body is higher than a circumferential speed of the take-up roller.

4. The air cleaner according to claim 1, comprising: a first cross gear having a fitting hole to be fitted with a rotating shaft of the drive motor, a second cross gear to be engaged with the first cross gear, a first parallel gear to be rotated integrally with the second cross gear and connected to the take-up roller, and a second parallel gear to be engaged with the first parallel gear and connected to the brush body.

5. The air cleaner according to claim 4, wherein an internal gear integrally provided with the second parallel shaft gear and a third parallel shaft gear meshing with the internal gear are provided between the brush body and the second parallel shaft gear, and a rotation shaft of the brush body is disposed between a rotation shaft of the first parallel shaft gear and a rotation shaft of the second parallel shaft gear.

6. The air cleaner according to any one of claims 1 to 5, wherein the filter has: the cleaning device includes a ventilation portion disposed to face the suction port when the cleaning device is stopped, and a housing portion fed out from the supply roller when the cleaning device is driven, and a pattern visible from the suction port is provided on the housing portion separately from the ventilation portion.

7. The air cleaner according to claim 6, wherein the blower is stopped upon driving of the cleaning device.