JP6718971B2 - Air cleaner - Google Patents

Description

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

Patent Document 1 discloses a conventional air cleaner. This air purifier has a housing that opens an inlet and an outlet. An air passage that connects the suction port and the air outlet is provided in the housing, and a blower is arranged in the air passage. A pre-filter (filter) is arranged facing the suction port.

When the air purifier having the above configuration is started, the blower is driven to suck the air in the living room through the suction port. The air sucked from the suction port is sent out from the air outlet after the dust is collected by the prefilter. As a result, the air in the living room can be cleaned.

In recent years, there has been an increasing demand for an air purifier equipped with a cleaning device for cleaning a prefilter. Patent Document 2 discloses a cleaning device that cleans a filter arranged facing an intake port of a projector. This cleaning device includes a supply roll, a winding roll, a brush body, a supply roll motor, a winding roll motor, a brush body motor, and a dust collection box.

A sheet-shaped filter is wound around the supply roll. The take-up roll is rotated by the drive of the take-up roll motor, and winds the filter pulled out from the supply roll. The brush body radially forms brush bristles on a shaft body, and when the winding roll is rotated, the brush bristles are rotated by the drive of the brush body motor, and the bristles rub the filter to remove dust. The dust collection box collects the dust removed from the filter by the brush body. The supply roll is rotationally driven by the supply roll motor to rewind the filter wound on the winding roll. This removes dust on the filter and cleans the filter.

Further, the cleaning device of Patent Document 2 has a detection switch. The detection switch is arranged near the take-up roll and detects whether or not the filter wound on the take-up roll has a predetermined outer diameter. When the detection switch detects that the filter wound on the winding roll has a predetermined outer diameter, the supply roll motor is driven. As a result, the filter wound on the winding roll is rewound onto the supply roll.

JP-A-2009-66466 (page 8, page 9, FIG. 1) Japanese Patent No. 5627066 (page 6, page 7, FIG. 1, FIG. 4)

However, according to the cleaning device of Patent Document 2, since the filter is in the form of a sheet, the outer diameter varies depending on the winding amount of the filter wound on the winding roll. Therefore, there is a problem that the detection switch cannot accurately detect the end of winding of the winding roll, resulting in insufficient cleaning of the filter.

An object of the present invention is to provide an air purifier that can sufficiently clean a filter.

In order to achieve the above object, the present invention is a housing that opens a suction port and a blowout port, an air passage that connects the suction port and the blowout port, a blower arranged in the air passage, and In an air purifier provided with a filter arranged facing the suction port, and a cleaning device for cleaning the filter,
The cleaning device includes a supply roll around which the sheet-shaped filter is wound, a winding roll that winds up the filter, a drive motor that rotationally drives the winding roll, and the supply when the winding roll is wound up. A biasing unit that biases the rotating shaft of the roll in the direction opposite to the winding direction, a brush body that slides on the filter when the winding roll rotates, and a rotation amount detection unit that detects the rotation amount of the drive motor. Has and
It is characterized in that the step-out of the drive motor is determined based on the detection result of the rotation amount detector, and the step-up of the drive motor is reversed when the step-out occurs.

In the air cleaner of the above structure according to the present invention, the rotation amount detecting unit includes a photo interrupter and a slit disk that rotates in association with the drive motor, and the filter is wound by the winding roll. Sometimes it is preferable to determine that the drive motor is out of step when the rotation amount detection unit does not detect a pulse output by the rotation of the slit disk for a predetermined time.

Further, according to the present invention, it is preferable that, in the air cleaner having the above-described configuration, an error notification is given when a rotation amount detected by the rotation amount detection unit when the drive motor is out of step is outside a predetermined range.

Further, the present invention is, in the air cleaner of the above configuration, comprising an attachment/detachment sensor for detecting attachment/detachment of the supply roll, wherein when the cleaning device is driven for the first time after the supply roll is attached/detached, the drive motor It is preferable that the amount of rotation of the drive motor at the time of reversal is smaller than the amount of rotation of the drive motor at the time of step out of the drive motor.

Further, the present invention, in the air cleaner of the above-mentioned configuration, when the cleaning device is stopped and restarted during driving, the rotation amount detected by the rotation amount detection unit is reset and the filter by the winding roll When winding is started and the rotation amount detected by the rotation amount detection unit at the end of winding the filter by the drive motor is larger than a predetermined rotation amount, the drive motor is reversed by the detected rotation amount, When it is smaller than the predetermined rotation amount, it is preferable to reverse the drive motor by the predetermined rotation amount.

According to the present invention, the out-of-step of the drive motor is determined based on the detection result of the rotation amount detection unit, and the out-of-step of the drive motor is reversed. This makes it possible to accurately detect the end of winding of the winding roll. Therefore, the filter can be sufficiently cleaned.

The front view which shows the air cleaner of 1st Embodiment of this invention. Side sectional drawing which shows the air cleaner of 1st Embodiment of this invention. The disassembled perspective view which shows the cleaning device of the air cleaner of 1st Embodiment of this invention. The top view which shows the prefilter of the air cleaner of 1st Embodiment of this invention. A side sectional view of a supply roll of a cleaning device of an air cleaner of a 1st embodiment of the present invention. The perspective view which shows the inside of the winding roll of the cleaning device of the air cleaner of 1st Embodiment of this invention, a dust collection part, and a gear unit. Enlarged perspective view of the inside of the gear unit of the cleaning device of the air cleaner of the first embodiment of the present invention The perspective view which shows the rotation amount detection part of the air cleaner of 1st Embodiment of this invention. The exploded perspective view of the biasing part of the cleaning device of the air cleaner of 1st Embodiment of this invention. The flowchart which shows operation|movement of the cleaning device of the air cleaner of 1st Embodiment of this invention. The side view before the supply roll of the support member of the cover part of the air cleaner of 2nd Embodiment of this invention is attached. The side view after the supply roll of the support member of the cover part of the air cleaner of 2nd Embodiment of this invention is attached. The side view before the supply roll of the support member of the cover part of the air cleaner of 3rd Embodiment of this invention is attached. The side view after the supply roll of the support member of the cover part of the air cleaner of 3rd Embodiment of this invention is attached. The top view of the prefilter of the air cleaner of 4th Embodiment of this invention. The perspective view of the holding member of the air cleaner of 5th Embodiment of this invention.

<First Embodiment>
Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show a front view and a side sectional view of the air cleaner of the first embodiment. The arrow S indicates the flow of air. The air purifier 1 has a housing 2 which is installed on a floor surface or the like in a living room by opening a suction port 3 and air outlets 4 and 5. The housing 2 has a main body 20 and a cover 21. The cover part 21 is detachably arranged on the back surface of the main body part 20 and opens the suction port 3. The main body 20 opens the outlets 4 and 5 on the upper front surface and the upper surface, respectively.

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

The wind direction plate 15 is a flat plate, and is supported by a rotation shaft portion 15b provided at the front portion of the wind direction plate 15 so as to be vertically rotatable. On the lower surface of the wind direction plate 15, a plurality of vertical louvers 15a are vertically installed side by side in the left-right direction. The vertical louvers 15a at both end portions are inclined outward in the left-right direction toward the rear.

The wind direction plates 14 and 15 close the air outlets 4 and 5 when the air purifier 1 is stopped, and open the air outlets 4 and 5 when the air cleaner 1 is in operation.

An air passage 8 that connects the suction port 3 and the outlets 4 and 5 is provided in the housing 2. In the air passage 8, the pre-filter 6 (filter), the deodorizing filter 7, the dust collecting filter 9, the humidifying unit 200, and the blower are sequentially provided from the suction port 3 toward the outlets 4 and 5 (from the upstream side to the downstream side of the air flow). 10, an ion generator 11 and a damper 12 are provided.

The air passage 8 has a first branch passage 8a and a second branch passage 8b that branch downstream of the ion generator 11. The first branch passage 8a and the second branch passage 8b communicate with the outlets 4 and 5, respectively, and the cross-sectional area of the air passage of the first branch passage 8a is smaller than that of the air passage of the second branch passage 8b. Is also getting smaller.

The damper 12 is formed in a thin plate shape, and is supported by the rotating shaft portion 12a so as to be vertically rotatable. The damper 12 can rotate in the opening direction (counterclockwise direction in FIG. 2) from the closed position (see FIG. 2) of the first branch passage 8a. The damper 12 changes the air volume balance of the first branch passage 8a and the second branch passage 8b.

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

The pre-filter 6 is formed of a sheet-like mesh of polypropylene or the like, and is arranged on the cover portion 21 so as to face the suction port 3. The pre-filter 6 can collect large dust in the intake air.

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

The dust collecting filter 9 is composed of a HEPA filter, and a frame material (not shown) is welded by hot melt so as to cover the filter material (not shown). The dust collection filter 9 can collect fine dust in the air and fine particles such as 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 the water in the tray 201 to humidify the air passing through the humidifying filter 202. As a result, humidified air is delivered from the outlets 4 and 5.

The ion generating device 11 has an ion generating surface 11 a that generates ions by applying a high voltage, and the ion generating surface 11 a faces the inside of the air passage 8. A voltage having an AC waveform or an impulse waveform is applied to the ion generating surface 11a. When the voltage applied to the ion generating surface 11a is a positive voltage, positive ions mainly composed of H ⁺ (H ₂ O)m are generated, and when the applied voltage is negative voltage, negative ions mainly composed of O ₂ ^- (H ₂ O)n are generated. appear. Here, m and n are integers. H ⁺ (H ₂ O)m and O ₂ ^- (H ₂ O)n aggregate on the surface of airborne bacteria and odorous components and surround them.

Then, as shown in the formulas (1) to (3), the active species [.OH] (hydroxyl radical) and H ₂ O ₂ (hydrogen peroxide) are aggregated and produced on the surface of the microorganism by collision. Destroy floating bacteria. Here, m′ and n′ are integers. Therefore, by generating positive ions and negative ions and sending them out from the outlets 4 and 5, it is possible to remove bacteria and remove odors in the living room.

H ⁺ (H ₂ O)m+O ₂ ^- (H ₂ O)n → OH+1/2O ₂ +(m+n)H ₂ O (1)
_{^{H + (H 2 O) m}} + H + (H 2 O) m '+ O 2 - (H 2 O) n + O 2 - (H 2 O) n'
→ 2·OH+O ₂ +(m+m′+n+n′)H ₂ O (2)
_{^{H + (H 2 O) m}} + H + (H 2 O) m '+ O 2 - (H 2 O) n + O 2 - (H 2 O) n'
→ H ₂ O ₂ +O ₂ +(m+m′+n+n′)H ₂ O (3)

An operation unit 19 is provided on the front portion of the upper surface of the main body unit 20. The operation unit 19 has a plurality of buttons (not shown), and the operation of the air cleaner 1 is set by the operation of the user. By operating each button, it is possible to change the air volume of the air delivered from the air outlets 4 and 5, the air blowing direction, and the like.

A display unit 17 is provided on the upper front surface of the main body unit 20. The display unit 17 is arranged to the right of the air outlet 4 and is composed of, for example, a liquid crystal panel.

Further, the cover portion 21 is provided with a cleaning device 30 for cleaning the prefilter 6. FIG. 3 shows an exploded perspective view of the cleaning device 30. The cleaning device 30 includes a supply roll 40, a take-up roll 50, a gear unit 60, a biasing unit 70, a brush body 80, a dust collecting unit 90, and a drive motor 100 (see FIG. 2).

The supply roll 40 and the winding roll 50 are arranged on the upper part and the lower part of the cover part 21, respectively, and hold both ends of the pre-filter 6. The pre-filter 6 is wound around the supply roll 40 when the cleaning device 30 is stopped, and is sent out from the supply roll 40 when the cleaning device 30 is driven and wound around the winding roll 50.

The supply roll 40 has a shaft 41 extending in the left-right direction, and caps 48 are fitted on both ends of the shaft 41. The cap 48 is rotatably supported by a support member 49 arranged at the upper end of the inner surface of the cover portion 21. Accordingly, the supply roll 40 is rotatably arranged on the rotation shaft extending in the left-right direction. Further, one end (right end) of the supply roll 40 is connected to the urging portion 70 via the cap 48.

Further, an attachment/detachment sensor (not shown) for detecting attachment/detachment of the supply roll 40 to/from the support member 49 is provided. The attachment/detachment sensor includes, for example, a Hall element (not shown) and a magnet (not shown). The magnet is attached to the supply roll 40. The Hall element is arranged on the back surface of the main body 20 at a position facing the magnet of the supply roll 40.

The winding roll 50 has a shaft 51 extending in the left-right direction, and caps 58 are fitted on 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 arranged at the lower end of the inner surface of the cover portion 21. Accordingly, the winding roll 50 is rotatably arranged on the rotation shaft extending in the left-right direction.

FIG. 4 shows a plan view of the prefilter 6. The pre-filter 6 has bar members 6 a extending in the left-right direction at both ends in the winding direction W and held by the supply roll 40 and the winding roll 50. Further, the pre-filter 6 has a ventilation part 6b arranged facing the suction port 3 when the cleaning device 30 is stopped, and a storage part 6c sent out from the supply roll 40 when the cleaning device 30 is driven.

A pattern 6g that is visible from the suction port 3 is provided on the storage section 6c in distinction from the ventilation section 6b. In the present embodiment, the red character "Cleaning in progress" is used as the design 6g. The design 6g is not particularly limited and may be, for example, a striped pattern of a color different from that of the ventilation portion 6b.

FIG. 5 shows a side sectional view of the supply roll 40. Since the winding roll 50 has the same structure as the supply roll 40, the supply roll 40 will be described as a representative. The shaft 41 forming the shaft portion of the supply roll 40 has a core material 41a and a sleeve 41d.

The core material 41a is made of an extruded product of a 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 facing 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 peripheral side than on the inner peripheral side. The inner wall surface 41c of the groove portion 41b supports the peripheral surface of the bar member 6a of the prefilter 6.

The sleeve 41d is formed of a resin molded product having a C-shaped cross section having an opening 41e extending in the axial direction, and is fitted onto the core material 41a. The pre-filter 6 having the bar member 6a supported on the groove 41b is inserted into the opening 41e. The width of the opening 41e of the sleeve 41d is smaller than the diameter of the bar member 6a, and the bar member 6a supported by the core member 41a is prevented from coming off. At this time, both ends in the circumferential direction of the sleeve 41d elastically press the bar member 6a, and the bar member 6a is elastically sandwiched by the groove 41b of the core member 41a and the sleeve 41d.

Further, when a force is applied in the direction of expanding the opening 41e of the sleeve 41d (the left-right direction in FIG. 5), the sleeve 41d is elastically deformed. The bar member 6a of the prefilter 6 can be attached to and detached from the shaft 41 through the widened opening 41e. Similarly, the bar member 6 a at the lower end of the prefilter 6 can be attached to and detached from the shaft 51. As a result, the pre-filter 6 can be easily removed from the cleaning device 30 and the pre-filter 6 can be replaced.

In FIG. 3, the brush body 80 is arranged in a dust collecting portion 90 detachably attached to the cover portion 21. The brush body 80 has a shaft 81 whose both ends in the axial direction are supported by the dust collecting portion 90, and rotates when the cleaning device 30 is driven to remove dust on the pre-filter 6 as described later. A spur gear 68 is provided on one end (right end) of the shaft 81, and brush bristle bundles 82 are helically planted on the peripheral surface of the shaft 81 at predetermined intervals.

The dust collecting portion 90 has a lid portion 91, a container 92, and a comb portion 93, and is detachably arranged on the cover portion 21. The container 92 is made of a transparent resin and has an upper surface opened to support the brush body 80 at both sides. The lid part 91 opens an opening part 91 a that opens to the left and right ends and covers the upper surface of the container 92. The brush bristle bundle 82 of the brush body 80 is exposed to the outside through the opening 91a. The comb portion 93 is formed so as to extend in the left-right direction, and is arranged in the container 92 with the tooth tips facing upward. The brush bristle bundle 82 of the rotating brush body 80 contacts the tooth tips of the comb portion 93. Dust adhering to the brush bristle bundle 82 is removed by the comb portion 93 from the brush bristle bundle 82.

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 portion 93 are collected in the container 92. At this time, since the container 92 is made of transparent resin, the user can easily grasp the amount of dust in the container 92.

The drive motor 100 (see FIG. 2) is arranged inside the main body portion 20 of the housing 2, and the rotation shaft (not shown) of the drive motor 100 projects rearward from the back surface of the main body portion 20. A stepping motor is used as the drive motor 100.

A pressing member 22 is arranged in front of the prefilter 6 with a predetermined gap. The pressing member 22 is detachably attached to the cover portion 21. The pressing member 22 has a rectangular frame 22a formed of a synthetic resin such as ABS. Inside the frame 22a, a rib 22b extending in the vertical direction and a plurality of (three in the present embodiment) ribs 22c extending in the horizontal direction and arranged in parallel in the vertical direction are provided. As a result, the pressing member 22 has windows in a plurality of stages and a plurality of rows. By the pressing member 22, the pre-filter 6 can be stably arranged along the suction port 3, and the pre-filter 6 can be prevented from loosening due to the suction air flow.

A magnet 23 is provided at the center of the right end of the frame 22a of the holding member 22. A Hall element (not shown) is provided at a position facing the magnet 23 of the main body 20. The air cleaner 1 can determine whether or not the cover portion 21 is attached to the main body portion 20 by the hall element. Then, the air purifier 1 prohibits the operation of the blower 10 when it determines that the cover portion 21 is not attached to the main body portion 20. This avoids the air blowing operation of the air purifier 1 when the cover 21 is not attached to the main body 20. Further, when the cover 21 is removed from the main body 20 while the cleaning device 30 is being driven, the driving of the cleaning device 30 is stopped.

Further, the gear unit 60 and the biasing portion 70 are arranged at one end (right end) of the cover portion 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 tape-shaped member 300 is attached to the space SP on which information regarding the handling instructions of the air purifier 1 is written. The above information includes information about a method for removing the pre-filter 6 from the cleaning device 30 and information about a method for operating the handle 73 of the urging unit 70, which will be described later.

This allows the user to visually recognize the above information when the cover part 21 is removed from the main body part 20, and to easily remove the prefilter 6 from the cleaning device 30 and operate the handle 73 of the urging part 70. Can be recognized. Therefore, the convenience of the air cleaner 1 can be improved.

FIG. 6 is a perspective view showing the inside of the winding roll 50, the dust collecting portion 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 shaft gear), a bevel gear 62 (second cross shaft gear), a spur gear 63 (first parallel shaft gear), a spur gear 64 (second parallel shaft gear), A gear 65, a spur gear 66, and a spur gear 67 are provided inside the housing 60a (see FIG. 3). The housing 60a is screwed to the cover portion 21 (see FIG. 3).

The bevel gear 61 is axially arranged in the front-rear direction, and has a fitting hole 61a on the shaft that fits into a rotation shaft (not shown) of the drive motor 100 (see FIG. 2). Bevel gear 62 is axially arranged in the left-right direction and meshes with bevel gear 61. The spur gear 63 is integrally 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. As a result, the spur gear 63 and the bevel gear 62 are connected to the winding roll 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 integrally formed concentrically with the spur gear 66. The spur gear 68 provided at one end of the brush body 80 meshes with the spur gear 67.

The take-up roll 50 is rotated by the driving of the drive motor 100 via the bevel gear 61 and the bevel gear 62. Further, the rotation of the spur gear 63 integrated with the bevel gear 62 causes the brush body 80 to rotate 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 meshes with the spur gear 64 connected to the brush body 80, the brush body 80 arranged parallel to the winding roll 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 rotary shaft of the brush body 80 is placed between the rotary shaft of the spur gear 63 (shaft portion 63a) and the rotary shaft of the spur gear 64. Can be placed at. Accordingly, the brush body 80 that slides on the pre-filter 6 on the take-up roll 50 can be easily arranged close to the take-up roll 50.

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

Further, the main body 20 of the air cleaner 1 is provided with a rotation amount detection unit 110. FIG. 8 is a perspective view of the rotation amount detection unit 110 viewed from the back side of the air purifier 1. The rotation amount detection unit 110 has a photo interrupter 111 and a slit disk 112.

The photo interrupter 111 has a light emitting unit 111a that emits light and a light receiving unit 111b that receives the light emitted from the light emitting unit 111a. The slit disk 112 is provided with a plurality of slits 112a in the circumferential direction at a predetermined cycle. The slit disk 112 is provided concentrically with the spur gear 115 and rotates integrally with the spur gear 115. The slit disk 112 is arranged so that the slit 112a passes between the light emitting unit 111a and the light receiving unit 111b when rotating. The spur gear 115 meshes with the spur gear 116, and the rotation shaft portion of the spur gear 116 is fixed to the rotation shaft portion of the drive motor 100. The spur gear 116 rotates integrally with the drive motor 100.

When the drive motor 100 rotates, the spur gears 115 and 116 and the slit disk 112 rotate. At this time, the photo interrupter 111 detects ON/OFF of the light passing through the slit 112a. As a result, the rotation amount detection unit 110 detects the number of pulses (rotation amount) output by the rotation of the slit disk 112. When the photo interrupter 111 does not detect a pulse for a predetermined time (for example, 6 seconds), the control unit (not shown) of the air cleaner 1 determines that the drive motor 100 is out of step.

FIG. 9 shows an exploded perspective view of the biasing portion 70 of the cleaning device 30. The biasing portion 70 has a rotating body 71 (first rotating body) and a rotating body 72 (second rotating body) housed in housings 78 and 79 screwed to each other. A holding portion 71a is provided so as to project from one end surface of the rotating body 71 in the axial direction, and a groove portion 71b is provided at the other end surface. A locking portion 48a provided on the cap 48 is fitted into the groove portion 71b. As a result, the rotating body 71 locks the shaft portion of the supply roll 40, and the supply roll 40 is connected to the urging portion 70.

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

A plurality of claws 72a are provided at predetermined intervals on the outer peripheral surface on the outer side (right side) in the axial direction of the rotating body 72. A stopper 77 is axially supported in the housing 78, and the stopper 77 is biased by a torsion coil spring 77a in a direction of pressing the rotating body 72. As a result, the rotation of the rotating body 72 is restricted by the engagement between the stopper 77 and the claw 72a so that the rotating body 72 is prevented from rotating clockwise when viewed from the direction of the arrow A so as to reduce the biasing force of the mainspring 75.

An opening 78a is opened on the right side surface of the housing 78, and a cylindrical handle 73 is arranged so as to cover the opening 78a. A flange portion 73a having a diameter larger than that of the opening portion 78a is arranged 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 in the axial direction through the opening 78a. As a result, the handle 73 is rotatably attached to the housing 78.

In the housing 78, a connecting member 74 is arranged on the inner side (left side) in the axial direction of the collar portion 73a. A compression spring 76 is disposed between the rotating body 72 and the connecting member 74, and the connecting member 74 is urged outward (right side) in the axial direction. A plurality of notches 74c are formed on the peripheral surface of the connecting member 74 at predetermined intervals. A plurality of radially extending ribs 72c that fit into the notches 74c are formed on the outer end of the rotating body 72 in the axial direction. As a result, 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 73a and the opening 78a. A plurality of inclined portions 74a and a plurality of ribs 74b are provided at predetermined intervals on the outer (right) surface in the axial direction of the connecting member 74. The inclined portion 74a is formed so as to be gradually higher in the counterclockwise direction when viewed from the arrow A direction. The ribs 74b extend radially adjacent to the top of the inclined portion 74a and are formed higher than the top.

A plurality of radially extending ribs 73b that engage with the ribs 74b are provided on the axially inner surface (left side surface) of the collar portion 73a. A protrusion (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 when viewed from the direction of the arrow A, the rib 74b engages with the rib 73b and the protrusion of the housing 78. As a result, the rotation of the handle 73 is restricted.

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

In the air purifier 1 having the above configuration, when the operation is started by operating the operation unit 19, it is determined whether the cover unit 21 is attached to the main body unit 20. When it is determined that the cover portion 21 is attached to the main body portion 20, the blower 10 and the ion generator 11 are driven. As a result, the air in the living room is sucked through the suction port 3 and flows through the air passage 8. At this time, the prefilter 6 collects large dust in the air. The deodorizing filter 7 deodorizes the air, and the dust collecting filter 9 collects fine dust in the air and fine particles such as PM2.5.

Then, the ions generated by the ion generator 11 are included in the air. The air containing ions is blown into the living room through one or both of the outlets 4, 5. As a result, the air purifying operation of the air purifier 1 is performed to clean the air in the living room.

FIG. 10 is a flowchart showing the operation of the cleaning device 30. At a predetermined time, the cleaning device 30 is driven and the cleaning operation by the cleaning device 30 is started. The cleaning operation is started, for example, when the cumulative operating time of the air purifier 1 within a predetermined period exceeds a predetermined time. The blower 10 is stopped when the cleaning device 30 is driven.

When the cleaning device 30 is driven, the flag F is assigned to the variable Y in step #11. The flag F is set to 0 when the previous cleaning operation of the cleaning device 30 is normally completed, and is set to 1 when the cleaning device 30 is stopped during driving. In step #12, 1 is assigned to the flag F.

In step #13, the drive motor 100 rotates, and the bevel gear 61 (see FIGS. 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). As a result, the winding roll 50 rotates clockwise as viewed from the right side surface, and the prefilter 6 is pulled out from the supply roll 40 and wound up.

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 surface, and the spur gear 68 rotates clockwise when viewed from the right side surface. As a result, the brush body 80 rotates clockwise as viewed from the right side surface. At this time, the bristles 82 of the brush body 80 slide on the pre-filter 6 on the take-up roll 50. As a result, 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 winding roll 50 and the rotation direction of the brush body 80 are the same. Therefore, the bristles 82 of the brush body 80 slide 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.

Further, the peripheral speed of the brush body 80 is preferably higher than the peripheral speed of the winding roll 50. Thereby, the contact length in the circumferential direction of the bristles of brush 82 on the pre-filter 6 is made longer than the contact period of the bristles of bristles 82, and the bristles of bristles 82 can be contacted on the pre-filter 6 without a gap. ..

The brush bristle bundle 82 on the rotating shaft 81 is combed by the comb portion 93, and the dust attached to the brush bristle bundle 82 falls into the container 92.

When the pre-filter 6 is wound on the winding roll 50, the rotating body 71 (see FIG. 8) of the biasing portion 70 connected to the supply roll 40 is clockwise when viewed from the right side (when viewed from the direction of arrow A). Rotate to. As a result, the mainspring 75 is wound, and the biasing force of the mainspring 75 increases.

At this time, the design 6g (see FIG. 4) on the storage portion 6c of the prefilter 6 moves downward and is visually recognized through the suction port 3. As a result, the user can easily recognize that the cleaning device 30 is being driven. Therefore, it is possible to prevent the user from mistakenly recognizing that the blower 10 has stopped due to a failure. The blower 10 may be operated at a low speed when the cleaning device 30 is driven.

At this time, it is desirable that the moving speed of the pre-filter 6 is about 4 mm/sec. Thereby, the torque of the drive motor 100 can be suppressed, and the dust on the pre-filter 6 can be reliably removed by the brush body 80.

In step #14, it is determined whether or not the cleaning device 30 has stopped during driving. For example, when the power of the air purifier 1 is turned off by the operation of the operation unit 19, a power failure occurs, or the cover unit 21 is removed from the main body unit 20, the cleaning device 30 stops during driving. .. When the cleaning device 30 is stopped by turning off the power supply or detaching the cover portion 21, an error is notified in step #31, and the process proceeds to step #26. If the cleaning device 30 is not stopped, the process proceeds to step #15.

In step #15, it is determined whether or not the drive motor 100 is out of step. If the drive motor 100 is out of step, the process proceeds to step #16, and if it is not out of step, the process returns to step #14, and steps #14 and #15 are repeated. At this time, the rotation detector 110 counts the slits 112a to detect the rotation amount N1 of the drive motor 100.

In step #16, it is determined whether the variable Y is 1. If the variable Y is 1, it indicates that the cleaning device 30 of the previous operation is an operation at the time of restarting after being stopped during driving, and the process proceeds to step #19. When the cleaning device 30 is stopped and restarted during driving, the rotation amount detected by the rotation amount detection unit 110 is reset and the winding of the pre-filter 6 by the winding roll 50 is started. If the variable Y is 0, it indicates that the cleaning device 30 of the previous operation has normally ended, and the process proceeds to step #17.

In step #17, it is determined whether the rotation amount N1 detected by the rotation detection unit 110 when the drive motor 100 is out of step is within a predetermined range (for example, 66 times<N1<96 times). If the rotation amount N1 is within the predetermined range, the process proceeds to step #18, and if it is outside the predetermined range, the process proceeds to step #31. When the rotation amount N1 is within the predetermined range, the winding of the pre-filter 6 by the winding roll 50 is completed when the drive motor 100 is out of synchronization.

When the rotation amount N1 is smaller than the lower limit value (66 times) of the predetermined range, for example, the winding of the pre-filter 6 by the winding roll 50 is stopped midway. Further, when the rotation amount N1 is larger than the upper limit value (96 times) of the predetermined range, for example, the winding of the prefilter 6 by the winding roll 50 is not completed.

In step 31, the display unit 17 displays characters or the like indicating an error. As a result, an error is notified, and the user can easily recognize that cleaning of the prefilter 6 by the cleaning device 30 has not been completed. The user takes a predetermined action based on the error notification. After step #31, the process moves to step #26.

In step #18, it is determined whether or not the supply roll 40 is the first cleaning operation after being attached to and detached from the cover portion 21. If it is the first cleaning operation, the process proceeds to step #22, and if it is not the first cleaning operation, the process proceeds to step #21. In step #21, the rotation amount N2 required for rewinding the pre-filter 6 onto the supply roll 40 of the drive motor 100 is set to the rotation amount N1. In step #22, the rotation amount N2 is set to a rotation amount smaller than the rotation amount N1 by a predetermined amount α (N1-α, for example, 79 times).

In step #19, it is determined whether or not the rotation amount N1 detected by the rotation amount detection unit 110 at the time of step-out of the drive motor 100 is larger than a predetermined upper limit rotation amount Nh (for example, 81 times). When the rotation amount N1 is larger than the upper limit rotation amount Nh, the process proceeds to step #21, and when it is not larger than the upper limit rotation amount Nh, the process proceeds to step #20.

In step #20, the rotation amount N2 is set to the upper limit rotation amount Nh. After step #20, step #21 and step #22, the process proceeds to step #23.

In step #23, the drive motor 100 is reversed. As a result, the bevel gear 61 rotates in the direction opposite to that at the time of winding (clockwise in this embodiment). At this time, the take-up roll 50 and the brush body 80 rotate counterclockwise as viewed from the right side surface.

When the winding of the prefilter 6 by the winding roll 50 is completed, the urging force of the mainspring 75 is larger than that before the winding. Therefore, when the drive motor 100 is reversed, the restoring force of the mainspring 75 causes the rotating body 71 to rotate counterclockwise when viewed from the right side surface. As a result, the pre-filter 6 is wound around the supply roll 40.

In step #24, the process waits until the rotation amount detected by the rotation amount detection unit 110 reaches the rotation amount N2. In step #25, 0 is assigned to the flag F. In step #26, the rotation of the drive motor 100 is stopped. With the above, the cleaning operation by the cleaning device 30 is completed.

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

Further, the supply roll 40 having one end of the prefilter 6 attached at the time of replacement of the prefilter 6 is attached to the cover portion 21. Then, the lower end of the prefilter 6 is attached to the winding roll 50.

At this time, the pre-filter 6 between the supply roll 40 and the winding roll 50 may be loosened. In this case, when the user turns the handle 73 of the biasing portion 70 counterclockwise when viewed from the right side (viewed from the direction of arrow A), the rotating bodies 71 and 72 rotate counterclockwise when viewed from the right side. To do. As a result, the pre-filter 6 is wound around the supply roll 40, and the looseness of the pre-filter 6 can be eliminated. Therefore, the air sucked from the suction port 3 when the blower 10 is driven can surely pass through the pre-filter 6.

According to the present embodiment, the step-out of the drive motor 100 is determined based on the detection result of the rotation amount detection unit 110, and when the step-out occurs, the drive motor 100 is reversed. This makes it possible to accurately detect the end of winding of the winding roll. Therefore, the pre-filter 6 (filter) can be sufficiently cleaned.

The rotation amount detection unit 110 also includes a photo interrupter 111 and a slit disk 112 that rotates in conjunction with the drive motor 100. Then, when the rotation amount detection unit 110 does not detect the pulse output by the rotation of the slit disk 112 for a predetermined time when the pre-filter 6 (filter) is wound by the winding roll 50, the step-out of the drive motor 100 is detected. To determine. Accordingly, it is possible to easily realize the step-out determination of the drive motor 100.

Further, when the rotation amount detected by the rotation amount detection unit 110 when the drive motor 100 is out of step is outside the predetermined range, an error notification is given. As a result, the user can easily recognize that the cleaning of the pre-filter 6 by the cleaning device 30 has not been completed.

Further, when the cleaning device 30 is driven for the first time after the supply roll 40 is attached and detached, the rotation amount of the drive motor 100 at the time of reversing is larger than the rotation amount of the drive motor 100 when the drive motor 100 is out of step. Make it smaller. Thereby, the slack of the pre-filter 6 after the cleaning operation of the cleaning device 30 is reduced, and the air containing dust can surely pass through the pre-filter 6.

Further, when the cleaning device 30 is stopped and restarted during driving, the rotation amount detected by the rotation amount detection unit 110 is reset and the winding of the pre-filter 6 by the winding roll 50 is started. When the rotation amount N1 detected by the rotation amount detection unit 110 at the end of winding the pre-filter 6 by the drive motor 100 is larger than the predetermined upper limit rotation amount Nh, the drive motor 100 is reversed by the detected rotation amount N1. If it is smaller than the upper limit rotation amount Nh, the drive motor 100 is reversed by the upper limit rotation amount Nh. Accordingly, even when the cleaning operation is completed after the cleaning device 30 is restarted, the pre-filter 6 can be reliably rewound on the supply roll 40.

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

Further, the rotation direction of the winding roll 50 and the rotation direction of the brush body 80 are the same. As a result, 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.

Further, the peripheral speed of the brush body 80 is preferably higher than the peripheral speed of the winding roll 50. Thereby, the contact length in the circumferential direction of the bristles of brush 82 on the pre-filter 6 is made longer than the contact period of the bristles of bristles 82, and the bristles of bristles 82 can be contacted on the pre-filter 6 without a gap. .. Therefore, the dust on the pre-filter 6 can be removed more reliably.

Further, the drive motor 100 is arranged on the main body 20 of the housing 2, and the supply roll 40 and the winding roll 50 are arranged on the cover 21. Thereby, the cover part 21 can be removed from the main body part 20 to easily replace the pre-filter 6. Although the air cleaner 1 includes the cleaning device 30, the prefilter 6 may be clogged depending on the installation location of the air cleaner 1 (for example, a place where oil stains are large such as a kitchen). .. Even in this case, the pre-filter 6 can be easily removed and carefully cleaned.

Further, a bevel gear 61 (first intersecting shaft gear) having a fitting hole 61a that fits into the rotating shaft of the drive motor 100, a bevel gear 62 (second intersecting shaft gear) meshing with the bevel gear 61, and a bevel gear. A spur gear 63 (first parallel shaft gear) that rotates integrally with the gear 62 and is connected to the winding roll 50, and a spur gear 64 that meshes with the spur gear 63 and is connected to the brush body 80 (second parallel shaft). Gears). Accordingly, the rotation of the take-up roll 50 and the brush body 80 by the one drive motor 100 can be easily realized.

Further, since the spur gear 63 connected to the winding roll 50 is arranged closer to the drive motor 100 than the spur gear 64 connected to the brush body 80, the damping of the driving force transmitted to the winding roll 50 is suppressed. it can. As a result, the winding roll 50 urged by the urging unit 70 via the pre-filter 6 can be reliably rotationally driven by the drive motor 100 against the urging force.

Further, between the brush body 80 and the spur gear 64, an internal gear 65 integrally provided with the spur gear 64 and a spur gear 66 (third parallel shaft gear) meshing with the internal gear 65 are provided. Of the spur gear 63 and the rotary shaft of the spur gear 64. Accordingly, the brush body 80 that slides on the pre-filter 6 on the take-up roll 50 can be easily arranged close to the take-up roll 50.

In addition, the pre-filter 6 has a ventilation part 6b arranged so as to face the suction port 3 when the cleaning device 30 is stopped, and a storage part 6c sent out from the supply roll 40 when the cleaning device 30 is driven. Further, a pattern 6g which is visible from the suction port 3 is provided on the storage section 6c in distinction from the ventilation section 6b. Thereby, the movement of the pre-filter 6 can be easily visually recognized, 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 the dust immediately after being removed from the pre-filter 6 from being sucked into the pre-filter 6 downstream. Further, the design 6g can prevent the user from erroneously recognizing that the blower 10 has stopped due to a failure.

Further, the urging unit 70 of the cleaning device 30 has a mainspring 75 that urges the rotation shaft of the supply roll 40 in a direction opposite to the winding direction when the prefilter 6 of the winding roll 50 is wound. As a result, when the drive motor 100 is reversed after the winding of the winding roll 50 is completed, the prefilter 6 is wound around the supply roll 40 by the restoring force of the mainspring 75. Therefore, it is not necessary to separately provide a motor for rotating the supply roll 40 in a direction opposite to the winding direction W of the winding roll 50, separately from the drive motor 100. As a result, the manufacturing cost of the air cleaner 1 can be further reduced. Further, since the mainspring 75 is used, the pre-filter 6 can be wound around the winding roll 50 over a long distance while being urged. Thereby, the degree of freedom in designing the size of the pre-filter 6 can be increased.

Further, the urging portion 70 locks the shaft portion of the supply roll 40 to attach a rotating body 71 (first rotating body) to which one end of the mainspring 75 is attached, and the other end of the mainspring 75 and attaches the mainspring 75. It has a rotating body 72 (second rotating body) whose rotation in the direction of reducing the force is restricted, and a handle 73 for rotating the rotating body 72. Accordingly, when the supply roll 40 is attached to the cover portion 21 and the handle 73 is operated, the prefilter 6 is wound in the direction opposite to the winding direction W. Therefore, the slack of the pre-filter 6 can be reduced, and the dust-containing air can reliably pass through the pre-filter 6.

Further, the urging portion 70 includes a connecting member 74 that is arranged between the handle 73 and the rotating body 72 and that restricts the rotation of the handle 73 in a direction that reduces the urging force of the mainspring 75, and the connecting member 74 rotates. It rotates together with the body 72. As a result, the rotation of the rotating body 72 in the direction of reducing the biasing force of the mainspring 75 can be reliably prevented.

Further, the shaft 41 of the supply roll 40 has a core material 41a having a groove portion 41b and a sleeve 41d made of an elastic body having a C-shaped cross section that is fitted onto the core material 41a. The bar material 6a is elastically clamped. As a result, by expanding the opening 41e of the sleeve 41d, the bar member 6a can be easily removed from the shaft 41. Further, the sleeve 41d can prevent the bar member 6a from falling off the shaft 41. The same applies to the winding roll 50.

The core material 41a of the supply roll 40 is made of metal, and the sleeve 41d is made of resin. The same applies to the winding roll 50. Thereby, the bar member 6a can be easily attached to and detached from the shafts 41, 51 while sufficiently securing the strength of the shafts 41, 51.

<Second Embodiment>
Next, a second embodiment of the present invention will be described. FIG. 11 shows a side view of the support member of the cover portion of the air cleaner of this embodiment. For convenience of description, the same parts as those in the first embodiment shown in FIGS. 1 to 10 are given the same reference numerals. In this embodiment, the structure of the support member 49 of the cover portion 21 is different from that of the first embodiment. Other parts are the same as those in the first embodiment.

A rotation plate 400 made of resin that rotates in the vertical direction is provided at the front end of the support member 49 (see FIG. 3) on the right side of the supply roll 40 of the cover portion 21. The shaft portion 401 of the rotating plate 400 is arranged rearward from the center of the rotating plate 400 in the front-rear direction. As a result, as shown in FIG. 11, when the supply roll 40 is not mounted on the support member 49, the front end portion of the rotating plate 400 projects forward of the support member 49. Therefore, if the cover portion 21 is attached to the main body portion 20 while the supply roll 40 is not attached to the cover portion 21, the front end portion of the rotating plate 400 interferes with the main body portion 20. Therefore, it is possible to easily prevent forgetting to attach the supply roll 40 to the cover portion 21.

On the other hand, as shown in FIG. 12, when the supply roll 40 is mounted on the support member 49, the supply roll 40 collides with the rear end portion of the rotating plate 400, and the rotating plate 400 rotates upward. As a result, the front end of the rotating plate 400 is retracted rearward, and interference between the rotating plate 400 and the main body 20 is prevented when the cover 21 is attached to the main body 20.

In this embodiment, the same effect as that of the first embodiment can be obtained.

<Third Embodiment>
Next, a third embodiment of the present invention will be described. FIG. 13 shows a side view of the support member of the cover part of the air cleaner of this embodiment. For convenience of description, the same parts as those in the first embodiment shown in FIGS. 1 to 10 are given the same reference numerals. In this embodiment, the structure of the support member 49 of the cover portion 21 is different from that of the first embodiment. Other parts are the same as those in the first embodiment.

The support member 49 has a fixed portion 49a and a moving portion 49b. 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 portion 21. At this time, the front end portion of the moving portion 49b is configured to project further forward than the fixed portion 49a with the spring 49c extended. As a result, as shown in FIG. 13, when the supply roll 40 is not mounted on the support member 49, the front end portion of the moving portion 49b projects further forward than the fixed portion 49a. Therefore, if the cover portion 21 is attached to the main body portion 20 while the supply roll 40 is not attached to the cover portion 21, the front end portion of the moving portion 49b interferes with the main body portion 20. Therefore, it is possible to easily prevent forgetting to attach the supply roll 40 to the cover portion 21.

On the other hand, as shown in FIG. 14, when the supply roll 40 is mounted on the support member 49, the supply roll 40 in contact with the fixed portion 49a moves the moving portion 49b rearward. As a result, the front end of the moving portion 49b is retracted rearward, and interference between the moving portion 49b and the main body portion 20 is prevented when the cover portion 21 is attached to the main body portion 20.

Also in this embodiment, the same effect as that of the first embodiment can be obtained.

In addition, in the second and third embodiments, a photo interrupter (not shown) may be provided instead of the magnet 23 and the Hall element of the first embodiment. The photo interrupter has a light emitting unit and a light receiving unit that face each other. In the case where the light receiving unit detects that the light traveling from the light emitting unit to the light receiving unit is blocked by the rotating plate 400 of the second embodiment or the moving unit 49b of the third embodiment that protrudes forward of the support member 49. , The drive of the blower 10 is prohibited. As a result, it is possible to prevent the air blowing operation of the air purifier 1 when the cover portion 21 is not attached to the main body portion 20.

<Fourth Embodiment>
Next, a fourth embodiment of the present invention will be described. FIG. 15 shows a plan view of the prefilter of the air cleaner of this embodiment. For convenience of description, the same parts as those in the first embodiment shown in FIGS. 1 to 10 are given the same reference numerals. In this embodiment, the configuration of the pre-filter 6 is different from that of the first embodiment. Other parts are the same as those in the first embodiment.

The sheet-shaped pre-filter 6 is formed by arranging the first area A1 to the fourth area A4 in the winding direction W. The first area A1 has a low mesh density, the second area A2 has a high mesh density, the third area A3 has activated carbon attached to the mesh, and the fourth area A4 has fragrance attached to the mesh. It has become an area.

Further, the air purifier 1 has a dust sensor (not shown) and an odor sensor (not shown). The dust sensor detects the dust concentration in the air in the living room. The odor sensor detects the concentration of odorous components in the air in the living room.

In the air cleaner 1 having the above-described configuration, for example, when it is determined that the dust concentration in the air is low based on the detection result of the dust sensor, the drive motor 100 is driven to rotate the take-up roll 50, and the first area A1 is It is arranged facing the suction port 3. Thereby, the ventilation efficiency of the air cleaner 1 can be improved. Further, for example, when it is determined that the dust concentration in the air is high based on the detection result of the dust sensor, the drive motor 100 is driven to rotate the winding roll 50, and the second area A2 faces the suction port 3. Will be distributed. The region arranged facing the suction port 3 can be determined based on the length of the first region A1 to the fourth region A4 in the winding direction W and the rotation amount of the drive motor 100.

When it is determined by the detection result of the odor sensor that the concentration of the odorous component in the air is high, the drive motor 100 is driven to rotate the winding roll 50, and the third area A3 or the fourth area A4 is set to the suction port 3 Is placed facing the.

As described above, the region of the pre-filter 6 suitable for the state of the air in the living room is arranged facing the suction port 3, so that the usability of the air cleaner 1 can be improved.

Also in this embodiment, the same effect as that of the first embodiment can be obtained. Further, the pre-filter 6 is formed by arranging the first area A1 to the fourth area A4 side by side in the winding direction W. As a result, the region of the pre-filter 6 suitable for the state of the air in the living room is arranged facing the suction port 3, so that the usability of the air purifier 1 can be improved.

The user may select the first area A1 to the fourth area A4 by operating the operation unit 19.

<Fifth Embodiment>
Next, a fifth embodiment of the present invention will be described. FIG. 16 shows a perspective view of a holding member of the prefilter of the air cleaner of this embodiment. For convenience of description, the same parts as those in the first embodiment shown in FIGS. 1 to 10 are given the same reference numerals. In this embodiment, the structure of the pressing member 22 is different from that of the first embodiment. Other parts are the same as those in the first embodiment.

The holding member 22 of the present embodiment has only the ribs 22b extending in the winding direction W of the pre-filter 6 (the vertical direction in the present embodiment), and extends in the direction orthogonal to the winding direction W (the horizontal direction in the present embodiment). Does not have extending ribs. As a result, it is possible to prevent dust from falling due to the rib extending in the direction orthogonal to the winding direction W sliding on the prefilter 6.

In this embodiment, the same effect as that of the first embodiment can be obtained.

In the first to fifth embodiments, the supply roll 40 and the winding roll 50 are arranged on the cover part 21, but instead of this, they may be arranged on the main body part 20.

In the cleaning operation of the air cleaner 1 of the first to fifth embodiments, the winding speed of the winding roll 50 and the rewinding speed to the supply roll 40 may be the same or different. For example, if the take-up speed of the take-up roll 50 is made lower than the rewind speed to the supply roll 40, the rewind speed can be increased while removing dust on the pre-filter 6 to shorten the cleaning operation time. it can.

INDUSTRIAL APPLICATION This invention can be utilized for the air cleaner provided with the cleaning device which cleans a filter.

1 Air Purifier 2 Housing 3 Suction Port 4, 5 Air Outlet 6 Pre-filter (filter)
6a Bar material 6b Ventilation part 6c Storage part 6g Design 7 Deodorizing filter 8 Air passage 8a 1st branch passage 8b 2nd branch passage 9 Dust collecting filter 10 Blower 11 Ion generator 12 Damper 14, 15 Wind direction plate 17 Display part 20 Main part 21 Cover Part 22 Holding Member 23 Magnet 30 Cleaning Device 40 Supply Roll 41 Shaft 41a Core Material 41d Sleeve 50 Winding Roll 60 Gear Unit 61 Bevel Gear (First Cross Shaft Gear)
62 Bevel gear (second cross shaft gear)
63 spur gear (first parallel shaft gear)
64 spur gear (second parallel shaft gear)
65 Internal gear 66 Spur gear (3rd parallel shaft gear)
70 Energizing Part 71 Rotating Body (First Rotating Body)
71a Clamping Part 72 Rotating Body (Second Rotating Body)
72a Claw 73 Handle 74 Connection member 75 Spring 76 Compression spring 77 Stopper 77a Torsion coil spring 78, 79 Housing 80 Brush body 81 Shaft 82 Brush bristle bundle 90 Dust collection section 91 Lid section 91a Opening section 92 Container 93 Comb section 100 Drive motor 110 Rotation Quantity detection unit 111 Photo interrupter 112 Slit disk 200 Humidification unit 201 Tray 202 Humidification filter 300 Tape member 400 Rotating plate 401 Shaft SP space

Claims (5)

A housing that opens a suction port and a blowout port, an air passage that connects the suction port and the blowout port, a blower arranged in the air passage, and a filter arranged facing the suction port. In an air cleaner provided with a cleaning device for cleaning the filter,
The cleaning device includes a supply roll around which the sheet-shaped filter is wound, a winding roll that winds up the filter, a drive motor that rotationally drives the winding roll, and the supply when the winding roll is wound up. A biasing unit that biases the rotating shaft of the roll in the direction opposite to the winding direction, a brush body that slides on the filter when the winding roll rotates, and a rotation amount detection unit that detects the rotation amount of the drive motor. Has and
An air purifier characterized in that step-out of the drive motor is determined based on a detection result of the rotation amount detector, and the step-up of the drive motor is reversed when the step-out occurs. The rotation amount detection unit has a photo interrupter and a slit disk that rotates in association with the drive motor,
When winding the filter by the winding roll, when the rotation amount detection unit does not detect a pulse output by the rotation of the slit disc for a predetermined time, it is determined that the drive motor is out of step. The air cleaner according to claim 1. The air cleaner according to claim 1 or 2, wherein error notification is performed when the rotation amount detected by the rotation amount detection unit when the drive motor is out of step is out of a predetermined range. A supply/detachment sensor for detecting attachment/detachment of the supply roll is provided,
When the cleaning device is driven for the first time after the supply roll is attached and detached, the rotation amount of the drive motor when the drive motor is reversed, the rotation amount of the drive motor when the drive motor is out of step. The air cleaner according to any one of claims 1 to 3, wherein the air cleaner is smaller than the above. When the cleaning device is stopped and restarted during driving, the rotation amount detected by the rotation amount detection unit is reset to start winding the filter by the winding roll,
When the rotation amount detected by the rotation amount detection unit at the end of winding the filter by the drive motor is larger than a predetermined rotation amount, the drive motor is reversed by the detected rotation amount, and the rotation amount is larger than the predetermined rotation amount. The air purifier according to any one of claims 1 to 4, wherein when it is small, the drive motor is reversed by the predetermined rotation amount.

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