JPWO2018179469A1 - Air cleaner - Google Patents

Abstract

The air purifier of the present invention includes a cleaning device (30). The cleaning device (30) includes a supply roll (40) in which a sheet-like filter (6) is wound on a shaft (41), and a filter (30). 6) a take-up roll (50) for taking up, a drive motor (100) for rotating and driving the take-up roll (50), and a supply roll (40) in a direction opposite to the direction of winding by the take-up roll (50). An urging unit (70) for urging, and a rotation amount detecting unit (110) for detecting a rotation amount of the supply roll (40), and a drive motor (110) based on a detection result of the rotation amount detecting unit (110). 100).

Description

  The present invention relates to an air purifier provided with a cleaning device for cleaning a filter.

  Patent Literature 1 discloses a conventional air purifier. This air purifier has a housing having an inlet and an outlet. An air passage connecting the suction port and the air outlet is provided in the housing, and a blower is disposed in the air passage. A pre-filter (filter) is arranged facing the suction port.

  In the air purifier having the above configuration, when the operation is started, the blower is driven to suck the air in the living room from the suction port. The air sucked in from the inlet is sent out from the outlet after dust is collected by the pre-filter. Thereby, the air in the living room can be cleaned.

  In recent years, there has been an increasing demand for an air purifier provided with a cleaning device for cleaning a pre-filter. Patent Literature 2 discloses a cleaning device that cleans a filter arranged to face an intake port of a projector. This cleaning device includes a supply roll, a take-up roll, a brush body, a supply roll motor, a take-up roll motor, a brush body motor, and a dust container.

  A sheet-like filter is wound around the supply roll. The take-up roll has cap members fitted on both ends of the shaft, and one end of the shaft is rotatably supported by a support portion. The other end of the shaft is connected to a take-up roll motor. As a result, the take-up roll is rotated by driving the take-up roll motor, and takes up the filter drawn from the supply roll.

  The brush body radially forms brush bristles on a shaft, and is rotated by driving of a brush body motor when the take-up roll rotates, so that the brush bristles rub the filter to remove dust. The dust collection container collects dust removed from above the filter by the brush body. The supply roll is rotationally driven by a supply roll motor, and rewinds the filter wound on the take-up roll. Thereby, dust on the filter is removed, and the filter is cleaned.

  Further, the cleaning device of Patent Document 2 has a detection switch. The detection switch is disposed near the winding roll, and detects whether or not the filter wound on the winding 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. Thereby, the filter wound up by the winding roll is rewound to 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 Literature 2, since the filter is in a sheet shape, the outer diameter varies with respect to the winding amount of the filter wound on the winding roll. For this reason, there is a problem that the detection switch cannot accurately detect the timing of the end of the winding of the winding roll and the timing of the end of the rewinding to the supply roll, resulting in insufficient cleaning of the filter.

  Further, according to the cleaning device of Patent Document 2, the cap material may be mistakenly inserted into the end of the shaft, and there is a problem that the assembling workability is reduced.

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

  Another object of the present invention is to provide an air purifier having improved workability in assembly.

  In order to achieve the above object, the present invention provides a housing that opens an inlet and an outlet, an air passage connecting the inlet and the outlet, a blower disposed in the air passage, In the air purifier provided with a filter disposed to face the suction port and a cleaning device for cleaning the filter, the cleaning device includes a supply roll in which the sheet-shaped filter is wound on a shaft, A take-up roll that takes up the filter, a drive motor that rotationally drives the take-up roll, an urging unit that urges the supply roll in a direction opposite to a take-up direction by the take-up roll, A rotation amount detection unit that detects a rotation amount, and performs drive control of the drive motor based on a detection result of the rotation amount detection unit.

  Further, the present invention, in the air purifier having the above configuration, a main body portion that opens the outlet, a cover portion that opens the suction port and is detachably disposed on the main body portion and holds the supply roll. Wherein the rotation amount detection unit has a light emitting unit and a light receiving unit disposed on the main body unit, and a light transmitting state and a light blocking state between the light emitting unit and the light receiving unit according to rotation of the supply roll. Is preferably switched.

  Further, the present invention provides the air purifier having the above configuration, wherein a cam surface formed on a peripheral surface of an end in an axial direction of the shaft, and a lever that slides on the cam surface and is displaced in a radial direction of the shaft. A lever member is disposed between the light emitting unit and the light receiving unit to form the light blocking state, and is retracted from between the light emitting unit and the light receiving unit to form the light transmitting state. It is preferable.

  Further, according to the present invention, in the air purifier having the above configuration, the lever member is formed of a thin member that is tiltably supported inside the main body, and a slit through which the lever member is inserted is provided in the main body. preferable.

  The present invention also provides the air purifier having the above configuration, wherein the light emitting unit and the light receiving unit face an axial end of the shaft via a window opening to the main body, and the light emitted from the light emitting unit. It is preferable to provide a reflecting portion for reflecting the light on the peripheral surface of the shaft.

  Further, according to the present invention, in the air purifier having the above configuration, it is preferable that the window is covered with a transparent member.

  Further, according to the present invention, in the air purifier having the above configuration, it is preferable that an error notification is performed when the supply roll does not reach a predetermined rotation amount within a predetermined time by rotating the winding roll.

  Further, in order to achieve the above object, the present invention provides a housing for opening an inlet and an outlet, an air passage connecting the inlet and the outlet, and a blower disposed in the air passage. In an air cleaner including a filter arranged to face the suction port and a cleaning device for cleaning the filter, the cleaning device has the sheet-shaped filter wound on a first shaft. A supply roll, a take-up roll for winding the filter on a second shaft, a first support member fitted to one end of the supply roll to rotatably support the supply roll, and the other end of the supply roll A first rotation driving unit that is connected to the supply roll to rotate the supply roll; a second support member that is fitted to one end of the take-up roll and rotatably supports the take-up roll; Connect the end to the winding roll And a plurality of cap members fitted to both ends of the first shaft and both ends of the second shaft, wherein the cap members are the first support member and the second support member. And a connecting portion that can be connected to the first rotation driving portion side and the second rotation driving portion side.

  Further, according to the present invention, in the air purifier having the above configuration, the first support member and the second support member have fitting holes of the same diameter, and the fitting portion is formed by the outer peripheral surface of the cap member. In addition, the coupling portion is formed by an engagement hole opened on an axial end surface of the cap member, and a shaft portion extending from the first rotation drive unit side and the second rotation drive unit side is formed in the engagement hole. It is preferable to engage.

  According to the air cleaner of the present invention, the drive of the drive motor is controlled based on the detection result of the rotation amount detection unit that detects the rotation amount of the supply roll, and the drive motor is reversed or stopped. This makes it possible to accurately detect the timing of the end of winding of the winding roll and the timing of the end of rewinding to the supply roll.

  Further, according to the air cleaner of the present invention, the cleaning device includes the first rotation drive unit that rotates the supply roll and the second rotation drive unit that rotates the take-up roll. The fitting portion of the cap member is formed so as to be able to be fitted to the first support member and the second support member. The connection part of the cap member is formed to be connectable to the first rotation drive part and the second rotation drive part. Thereby, the cap members provided at both ends of the supply roll and the take-up roll can be shared. Therefore, it is possible to reduce the cost of parts of the air purifier and to improve the workability of assembly.

FIG. 1 is a front view showing an air purifier according to a first embodiment of the present invention. 1 is a side sectional view showing an air purifier according to a first embodiment of the present invention. FIG. 1 is an exploded perspective view showing a cleaning device of an air purifier according to a first embodiment of the present invention. The perspective view which shows the cap member of the air cleaner of 1st Embodiment of this invention. Side sectional view showing a cap member of the air purifier according to the first embodiment of the present invention. Side sectional view showing a cap member of the air purifier according to the first embodiment of the present invention. The top view which shows the pre-filter of the air cleaner of 1st Embodiment of this invention. FIG. 2 is a perspective view showing the inside of a take-up roll, a dust collecting unit, and a gear unit of the cleaning device of the air purifier according to the first embodiment of the present invention. The enlarged perspective view inside the gear unit of the cleaning device of the air cleaner of the first embodiment of the present invention. The side view which shows the rotation detection part of the air cleaner of 1st Embodiment of this invention. Top view showing a rotation detector of the air purifier according to the first embodiment of the present invention. FIG. 2 is an exploded perspective view of an urging portion of the cleaning device of the air purifier according to the first embodiment of the present invention. The side view which shows the rotation detection part of the air cleaner of 2nd Embodiment of this invention. Top view showing a rotation detector of an air purifier according to a second embodiment of the present invention. The perspective view which shows the cap member of the air cleaner of 3rd Embodiment of this invention.

<First embodiment>
An embodiment 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 purifier of the first embodiment. The front of the air purifier 1 is defined as a Y1 direction, and the rear is defined as a Y2 direction. Arrow S indicates the flow of air. The air purifier 1 has a housing 2 which is opened on a floor or the like in a living room with an inlet 3 and outlets 4 and 5 opened. The housing 2 has a main body 20 and a cover 21. The cover portion 21 is detachably provided on the back surface 20 a of the main body portion 20, and opens the suction port 3. The main body 20 has the outlets 4 and 5 opened at the upper front and upper surfaces, respectively.

  The air outlets 4 and 5 are provided with wind direction plates 14 and 15 for changing the wind direction, respectively. The wind direction plate 14 is formed of a flat plate, and is supported by a rotation shaft (not shown) provided on the wind direction plate 14 so as to be rotatable vertically. A plurality of vertical louvers 14a are vertically arranged on the lower surface of the wind direction plate 14 in the left-right direction. The vertical louvers 14a at both ends are inclined outward in the left-right direction as going 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 vertically arranged on the lower surface of the wind direction plate 15 side by side in the left-right direction. The vertical louvers 15a at both ends are inclined outward in the left-right direction as going backward.

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

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

  The air passage 8 has a first branch passage 8 a and a second branch passage 8 b that branch off 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 flow passage of the first branch passage 8a is smaller than the cross-sectional area of the air flow 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 a rotation shaft portion 12a so as to be rotatable in the vertical direction. The damper 12 can rotate in a direction to open (counterclockwise in FIG. 2) the first branch passage 8a from a closed position (see FIG. 2). The damper 12 changes the air flow balance between 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 the motor 10a, and takes in 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 disposed on the cover 21 facing the suction port 3. Large 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 collection filter 9 is formed 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 collecting 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 part of the humidifying filter 202 in the water in the tray 201, and humidifies the air passing through the humidifying filter 202. Thereby, the humidified air is sent out from the outlets 4 and 5.

The ion generator 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 generation surface 11a. When the voltage applied to the ion generation surface 11a is a positive voltage, positive ions mainly composed of H ⁺ (H ₂ O) m are generated, and when the voltage is negative, 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 surrounds these aggregated on the surface of airborne bacteria and odorous components in the air.

Then, as shown in formulas (1) to (3), the active species [.OH] (hydroxyl radical) and H ₂ O ₂ (hydrogen peroxide) are aggregated and generated on the surface of a microorganism or the like by collision. Destroy floating bacteria. Here, m ′ and n ′ are integers. Therefore, by generating plus ions and minus ions and sending them out of 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 at a front portion 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 purifier 1 by a user's operation. By operating the respective buttons, it is possible to change the air volume of the air sent from the air outlets 4 and 5 and change the air blowing direction.

  The display unit 17 is provided on the upper part of the front surface of the main unit 20. The display unit 17 is disposed on the right side of the outlet 4 and is constituted by, for example, a liquid crystal panel.

  The cover 21 is provided with a cleaning device 30 for cleaning the pre-filter 6. FIG. 3 is 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, an urging unit 70, a brush body 80, a dust collection unit 90, and a drive motor 100 (see FIG. 2).

  The supply roll 40 and the take-up roll 50 are arranged on the upper and lower portions of the cover 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 is taken up by the take-up roll 50.

  The supply roll 40 has a shaft 41 (first shaft) extending in the left-right direction, and cap members 58 are fitted to both ends of the shaft 41. One end of the supply roll 40 is supported by a support member 49 attached to the upper end of the inner surface of the cover 21. The other end of the supply roll 40 is connected to a biasing unit 70 (first rotation driving unit) via a cam 112 described later.

  In addition, an attachment / detachment sensor (not shown) for detecting attachment / detachment of the supply roll 40 to / from the support member 49 is provided. The detachable sensor is composed of, 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 20 a of the main body 20 at a position facing the magnet of the supply roll 40.

  The take-up roll 50 has a shaft 51 (second shaft) extending in the left-right direction, and cap members 58 are fitted to both ends of the shaft 51. One end of the take-up roll 50 is supported by a support member 59 attached to the lower end of the inner surface of the cover 21. The other end of the supply roll 40 is connected via a gear unit 60 to a drive motor 100 (second rotation drive unit, see FIG. 2).

  Cap members 58 provided at both ends of the supply roll 40 and both ends of the take-up roll 50 are formed in the same shape. FIG. 4 is a perspective view of the cap member 58, and FIGS. 5 and 6 are side sectional views of the cap member 58. The cap member 58 has a cylindrical body portion 58a (fitting portion), a protruding portion 58b that protrudes in the axial direction from the body portion 58a, and an engagement hole 58c (connecting portion) that opens on the axial end surface of the protruding portion 58b. And

  The shaft 41 of the supply roll 40 and the shaft 51 of the take-up roll 50 are formed to have the same diameter. A fitting hole 49a opened in the support member (first support member) 49 and a fitting hole 59a opened in the support member (second support member) 59 are formed to have the same diameter. One end of the body portion 58a is open, and is fitted to one end portion of the shaft 41 and the shaft 51. The body portion 58a is fitted into the fitting hole 49a of the support member 49 and the fitting hole 59a of the support member 59, and is rotatably supported.

  The inner peripheral surface of the engagement hole 58c is formed in a female spline shape. A male spline-shaped shaft portion 112d protrudes in the axial direction from the cam 112 connected to the urging portion 70 (see FIG. 3). On the spur gear 63 (see FIG. 9) of the gear unit 60, a male spline-shaped shaft portion 63a (see FIG. 9) having the same shape as the shaft portion 112d of the cam 112 projects in the axial direction. The shaft portion 112d is engaged with the engagement hole 58c, and the shaft 41 and the urging portion 70 (see FIG. 3) are connected. Further, the shaft portion 63a is engaged with the engagement hole 58c, and the shaft 51 and the drive motor 100 (see FIG. 2) are connected.

  Thereby, the cap members 58 disposed at both ends of the supply roll 40 and the take-up roll 50 can be shared. Therefore, it is possible to reduce the cost of parts of the air purifier 1 and to improve the workability of assembly.

  FIG. 7 shows a plan view of the pre-filter 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 portion 6b arranged facing the suction port 3 when the cleaning device 30 is stopped, and a storage portion 6c sent out from the supply roll 40 when the cleaning device 30 is driven.

  On the storage part 6c, there is provided a design 6g which is visible from the suction port 3 separately from the ventilation part 6b. In the present embodiment, a red character “cleaning” is used as the symbol 6g. The design 6g is not particularly limited, and may be, for example, a stripe pattern of a color different from that of the ventilation portion 6b.

  In FIG. 3, the brush body 80 is disposed on a dust collection unit 90 that is detachably attached to the cover unit 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 at one end (right end) of the shaft 81, and brush bristle bundles 82 are spirally implanted at predetermined intervals on the peripheral surface of the shaft 81.

  The dust collecting section 90 has a lid section 91, a dust collecting container 92, and a comb section 93, and is detachably provided to the cover section 21. The dust collecting container 92 is formed of a transparent resin, has an open upper surface, and supports the brush body 80 on both sides. The lid 91 opens an opening 91 a that opens over the left and right ends, and covers the upper surface of the dust 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 to extend in the left-right direction, and is disposed in the dust container 92 with the tooth tip facing upward. The brush bristle bundle 82 of the rotating brush body 80 abuts on the tip of the comb 93. The dust attached to the brush bristle bundle 82 is removed from the brush bristle bundle 82 by the comb part 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 portion 93 are stored in a dust collection container 92. At this time, since the dust container 92 is formed of a transparent resin, the user can easily grasp the amount of dust in the dust container 92.

  The drive motor 100 (see FIG. 2) is disposed inside the main body 20 of the housing 2, and a rotation shaft (not shown) of the drive motor 100 protrudes rearward from the back surface 20 a of the main body 20. As the drive motor 100, a stepping motor is used.

  A holding member 22 is provided in front of the pre-filter 6 with a predetermined gap. The holding member 22 is detachably attached to the cover 21. The pre-filter 6 is stably arranged along the suction port 3 by the pressing member 22, and it is possible to prevent the pre-filter 6 from being loosened by the suction air flow.

  FIG. 8 is a perspective view showing the inside of the take-up roll 50, the dust collecting unit 90, and the gear unit 60 of the cleaning device 30. FIG. 9 is an enlarged perspective view of the inside of the gear unit 60. The gear unit 60 includes a bevel gear 61, a bevel gear 62, a spur gear 63, a spur gear 64, 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 arranged in the front-rear direction with respect to the axial direction, and has a fitting hole 61a on the shaft for fitting to a rotation shaft (not shown) of the drive motor 100 (see FIG. 2). The bevel gear 62 is arranged in the left-right direction in the axial direction, and meshes with the bevel gear 61. The spur gear 63 is formed integrally and concentrically with the bevel gear 62.

  The shaft 63 a of the spur gear 63 is engaged with the cap member 58, and the spur gear 63 and the bevel gear 62 are connected to the winding roll 50.

  The spur gear 64 is arranged 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 integrally and 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 drive of the drive motor 100 rotates the winding roll 50 via the bevel gear 61 and the bevel gear 62. The rotation of the spur gear 63 integral 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 and the spur gear 64 connected to the brush body 80 mesh with each other, the brush body 80 arranged in parallel with 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 rotation axis of the brush body 80 can be disposed between the rotation axis of the spur gear 63 and the rotation axis of the spur gear 64. it can. Thereby, the brush body 80 that slides on the pre-filter 6 on the winding roll 50 can be easily arranged close to the winding roll 50.

  Note that the bevel gears 61 and 62 only need to 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 air purifier 1 is provided with a rotation amount detection unit 110 for detecting the rotation amount of the supply roll 40. FIG. 10 is a side view of the rotation amount detection unit 110, and FIG. 11 is a top view of the rotation amount detection unit 110. The rotation amount detection unit 110 includes a photo interrupter 111, a cam 112, and a lever member 113.

  The photo interrupter 111 is provided in the main body 20, and the light emitting unit 111 a and the light receiving unit 111 b of the photo interrupter 111 are arranged adjacent to each other in the axial direction of the supply roll 40.

  The cam 112 is connected to the axial end of the shaft 41 via the cap member 58, and rotates concentrically with the shaft 41. On the peripheral surface of the cam 112, a cam surface 112a in which a plurality of concave portions 112b that are concave in the radial direction are arranged at a predetermined period in the peripheral direction is formed.

  The lever member 113 has a thin plate shape, and is supported in a tiltable manner inside the main body 20 by a shaft 113a at a front end in the front-rear direction (Y1-Y2 direction). Further, the lever member 113 can reciprocate up and down around the pivot shaft 113a.

  The lever member 113 extends toward the supply roll 40 through a slit 20b formed in the back surface 20a of the main body 20, and a projecting piece 113b that projects downward is provided at the rear end of the lever member 113. The protruding piece 113b is disposed above the cam surface 112a and abuts against the cam surface 112a by its own weight. Alternatively, the other end of the spring (elastic member) whose one end is fixed to the main body 20 may be fixed to the upper part of the lever member 113, and the projecting piece 113b may be brought into contact with the cam surface 112a using the elastic force of the spring. Good.

  Since the lever member 113 is provided inside the main body 20, the supply roll 40 and the main body 20 can be provided close to each other, and the size of the air cleaner 1 can be reduced. Further, since the lever member 113 is formed of a thin member and the main body 20 is provided with the slit 20b through which the lever member 113 is inserted, the width of the slit 20b can be reduced. Thereby, since the finger of the user is not inserted through the slit 20b, contact between the electric component in the main body 20 and the finger can be prevented, and the safety of the air purifier 1 can be improved. Further, it is possible to prevent the dust from entering the main body 20 through the slit 20b and causing the electrical components to fail.

  When the supply roll 40 rotates, the protruding piece 113b slides on the uneven cam surface 112a, and the lever member 113 is displaced in the radial direction of the shaft 41 at a predetermined cycle. Thereby, the light transmitting state and the light shielding state between the light emitting unit 111a and the light receiving unit 111b are switched according to the rotation of the supply roll 40.

  That is, when the lever member 13 is disposed between the light emitting unit 111a and the light receiving unit 111b, the space between the light emitting unit 111a and the light receiving unit 111b is in a light blocking state. Further, as shown by the one-dot chain line in FIG. 10, when the lever member 13 is retracted from between the light emitting unit 111a and the light receiving unit 111b, the space between the light emitting unit 111a and the light receiving unit 111b enters a light transmitting state.

  The photo interrupter 111 detects on / off of light received by the light receiving unit 111b. Accordingly, the rotation amount detection unit 110 can detect the rotation amount of the supply roll 40 based on the number of pulses output from the light receiving unit 111b.

  Further, the light-transmitting state and the light-shielding state between the light emitting unit 111a and the light receiving unit 111b are switched by the displacement of the lever member 113 sliding on the cam 112 integrated with the supply roll 40. For this reason, the rotating cam 112 is formed to have a small diameter, and the lever member 113 can be disposed only in one radial direction (upward in the present embodiment) with respect to the cam 112. Therefore, the size of the air purifier 1 can be reduced.

  FIG. 12 is an exploded perspective view of the urging portion 70 of the cleaning device 30. The urging portion 70 has a rotating body 71 and a rotating body 72 housed in housings 78 and 79 screwed to each other. A holding portion 71a is protruded from one end surface in the axial direction of the rotating body 71, and a groove portion 71b is provided on the other end surface. The locking portion 48a provided on one end surface of the locking member 48 connected to the cam 112 fits into the groove 71b. Thus, the supply roll 40 is connected to the rotating body 71 via the cap member 58, the cam 112, and the locking member 48, and is connected to the urging unit 70.

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

  A plurality of claws 72a are provided at predetermined intervals on the outer circumferential surface (right side) in the axial direction of the rotating body 72. A stopper 77 is pivotally supported in the housing 78, and the stopper 77 is urged by a torsion coil spring 77a in a direction of pressing the rotating body 72. Accordingly, the rotation of the rotating body 72 in the clockwise direction, which reduces the urging force of the mainspring 75 when viewed from the direction of arrow A, is restricted by the engagement between the stopper 77 and the claw 72a.

  An opening 78a is opened on the right side of the housing 78, and a cylindrical handle 73 is arranged so as to cover the opening 78a. A flange 73a having a larger diameter than the opening 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 via the opening 78a. Thus, the handle 73 is rotatably attached to the housing 78.

  In the housing 78, a connecting member 74 is disposed inside (left side) in the axial direction of the flange 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 (to the right) in the axial direction. A plurality of notches 74c are formed at predetermined intervals on the peripheral surface of the connecting member 74. A plurality of radially extending ribs 72c that fit into the notches 74c are formed at the outer end of the rotating body 72 in the axial direction. 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 73a and the opening 78a. A plurality of inclined portions 74a and a plurality of ribs 74b are provided at predetermined intervals on an outer surface (right side) of the connecting member 74 in the axial direction. The inclined portion 74a is formed gradually higher counterclockwise as viewed from the direction of arrow A. The rib 74b extends radially adjacent to the top of the inclined portion 74a and is formed higher than the top.

  A plurality of radially extending ribs 73b that engage with the ribs 74b are provided on an inner surface (left side surface) of the flange portion 73a in the axial direction. 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 from the direction of arrow A, the rib 74b engages with the rib 73b and engages with the protrusion 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 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. Thereby, the handle 73 can be rotated, and the rib 74b is engaged with the rib 73b, and the rotating body 72 rotates in a direction to increase the urging 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 or not the cover unit 21 is attached to the main body unit 20. When it is determined that the cover 21 is attached to the main body 20, the blower 10 and the ion generator 11 are driven. Thereby, the air in the living room is sucked in from the suction port 3 and flows through the ventilation passage 8. At this time, large dust is collected in the air by the pre-filter 6. Further, the air is deodorized by the deodorizing filter 7, and the fine dust and fine particles such as PM2.5 in the air are collected by the dust collecting filter 9.

  Then, ions generated by the ion generator 11 are included in the air. Air containing ions is blown into the room from one or both of the outlets 4 and 5. Thereby, the blowing operation of the air purifier 1 is performed, and the air in the living room is cleaned.

  Next, the operation of the cleaning device 30 will be described. 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 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 FIGS. 6 and 7) rotates counterclockwise when viewed from the front. The bevel gear 62 and the spur gear 63 rotate clockwise as viewed from the right side surface (as viewed from the direction of arrow A). As a result, the take-up roll 50 rotates clockwise as viewed from the right side, and pulls out the pre-filter 6 from the supply roll 40 to take up.

  The spur gear 64, the internal gear 65, the spur gear 66, and the spur gear 67 rotate counterclockwise as viewed from the right side, and the spur gear 68 rotates clockwise as viewed from the right side. Thereby, the brush body 80 rotates clockwise as viewed from the right side. At this time, the brush bristle bundle 82 of the brush body 80 slides on the pre-filter 6 on the winding roll 50. Thus, 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. For this reason, the brush bristle bundle 82 of the brush body 80 slides on the pre-filter 6 in a direction opposite to the traveling direction of the pre-filter 6. Therefore, the brush body 80 can reliably remove dust on the pre-filter 6.

  It is desirable that the peripheral speed of the brush body 80 be higher than the peripheral speed of the winding roll 50. Accordingly, the contact length of the brush bristle bundle 82 in the circumferential direction on the pre-filter 6 is made longer than the contact period of the brush bristle bundle 82, and the brush bristle bundle 82 can be contacted on the pre-filter 6 without any gap. .

  The brush bristle bundle 82 on the rotating shaft 81 is combed by the comb part 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 urging unit 70 connected to the supply roll 40 rotates clockwise as viewed from the right side (as viewed from the direction of arrow A). To rotate. Thereby, the mainspring 75 is wound, and the urging force of the mainspring 75 increases.

  At this time, the symbol 6g (see FIG. 4) on the storage portion 6c of the pre-filter 6 moves downward and is visually recognized through the suction port 3. Thus, the user can easily recognize that the cleaning device 30 is being driven. Therefore, it is possible to prevent the user from erroneously 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.

  When the rotation amount of the supply roll 40 reaches a predetermined value by the detection of the rotation amount detection unit 110, the drive motor 100 reverses. This causes the bevel gear 61 to rotate in the opposite direction (clockwise in this embodiment) from the time of winding. At this time, the take-up roll 50 and the brush body 80 rotate counterclockwise when viewed from the right side.

  When the winding of the pre-filter 6 by the winding roll 50 is completed, the biasing force of the mainspring 75 is larger than before the winding. Therefore, when the drive motor 100 is reversed, the rotating body 71 rotates counterclockwise when viewed from the right side by the restoring force of the mainspring 75. Thereby, the pre-filter 6 is rewound on the supply roll 40.

  When the rotation amount of the supply roll 40 reaches a predetermined value by the detection of the rotation amount detection unit 110, the drive motor 100 is stopped. Thus, the cleaning operation by the cleaning device 30 ends.

  The driving of the drive motor 100 is controlled based on the detection result of the rotation amount detection unit 110 that detects the rotation amount of the supply roll 40, and the drive motor 100 is reversed or stopped. Thereby, the timing of the end of the winding of the winding roll 50 and the timing of the end of the rewinding to the supply roll 40 can be accurately detected.

  If the supply roll 40 does not reach the predetermined rotation amount within the predetermined time even if the drive motor 100 is driven, an error message is displayed on the display unit 17 by displaying characters indicating an error.

  If the supply roll 40 falls off or the bar member 6a of the pre-filter 6 detaches from the shaft 41 and the shaft 51, the supply roll 40 does not rotate even if the winding roll 50 rotates. Further, when the rotation load of the supply roll 40 increases due to dust accumulated on the pre-filter 6, the pre-filter 6 is not normally rewound on the supply roll 40.

  In these cases, the control unit (not shown) determines that the supply roll 40 is not rotating normally in conjunction with the take-up roll 50 and issues an error notification. Thus, the user can easily recognize that cleaning of the pre-filter 6 by the cleaning device 30 has not been completed. At this time, since the rotation amount detection unit 110 detects the rotation amount of the supply roll 40, these errors can be easily detected.

  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 accumulated in the container 92.

  When the pre-filter 6 is replaced, a supply roll 40 to which one end of the pre-filter 6 is attached is attached to the cover 21. Then, the lower end of the pre-filter 6 is attached to the take-up roll 50.

  At this time, the pre-filter 6 between the supply roll 40 and the take-up roll 50 may be loosened. In this case, when the user turns the handle 73 of the urging portion 70 counterclockwise as viewed from the right side (as viewed from the direction of arrow A), the rotating bodies 71 and 72 rotate counterclockwise as viewed from the right side. I do. Thereby, the pre-filter 6 is taken up by the supply roll 40, and the slack of the pre-filter 6 can be eliminated. Therefore, the air sucked from the suction port 3 when the blower 10 is driven can pass through the pre-filter 6 without fail.

  According to the present embodiment, the drive of the drive motor 100 is controlled based on the detection result of the rotation amount detection unit 110 that detects the rotation amount of the supply roll 40, and the inversion or stop of the drive motor 100 is performed. Thereby, the timing of the end of the winding of the winding roll 50 and the timing of the end of the rewinding to the supply roll 40 can be accurately detected.

  Further, when the supply roll 40 does not rotate normally in conjunction with the take-up roll 50, an error can be easily detected by the rotation amount detection unit 110 that detects the rotation amount of the supply roll 40.

  In addition, the rotation amount detection unit 110 includes a light emitting unit 111a and a light receiving unit 111b disposed on the main body unit 20, and a light transmitting state between the light emitting unit 111a and the light receiving unit 111b and a light blocking state according to the rotation of the supply roll 40. The state is switched. Thereby, the rotation amount detection unit 110 can be easily realized.

  In addition, a light blocking state and a light transmitting state are formed by the lever member 113 by the displacement of the lever member 113 that slides on a cam surface 112a formed on the peripheral surface of the cam 112 integrated with the shaft 41. Thus, the rotating cam 112 is formed to have a small diameter, and the lever member 113 can be disposed only in one radial direction with respect to the cam 112. Therefore, the size of the air purifier 1 can be reduced.

  Further, the lever member 113 is formed of a thin member that is supported to be tiltable inside the main body 20, and a slit 20 b through which the lever member 113 is inserted is provided in the main body 20. Thereby, the supply roll 40 and the main body 20 can be provided close to each other, and the size of the air cleaner 1 can be reduced. Further, contact between the electrical components in the main body 20 and the fingers can be prevented, and the safety of the air purifier 1 can be improved.

  Further, if the supply roll 40 does not reach the predetermined rotation amount within the predetermined time after the winding roller 50 is driven to rotate, an error notification is performed. Thus, the user can easily recognize that cleaning of the pre-filter 6 by the cleaning device 30 has not been completed.

  Further, the cleaning device 30 includes an urging unit 70 (first rotation driving unit) for rotating the supply roll 40 and a driving motor 100 (second rotation driving unit) for rotating the winding roll 50. The body 58 a (fitting portion) of the cap member 58 is formed so as to be fittable with the support member (first support member) 49 and the support member (second support member) 59. The engagement hole 58c (connection portion) of the cap member 58 is formed so as to be connectable to the cam 112 on the urging portion 70 side and the spur gear 63 on the drive motor 100 side. Thereby, the cap members 58 disposed at both ends of the supply roll 40 and the take-up roll 50 can be shared. Therefore, it is possible to reduce the cost of parts of the air purifier 1 and to improve the workability of assembly.

<Second embodiment>
Next, a second embodiment of the present invention will be described. 13 and 14 show a side view and a top view of the rotation amount detection unit 110 according to the second embodiment. For the sake of convenience of explanation, the same parts as those in the first embodiment shown in FIGS. 1 to 12 are denoted by the same reference numerals. In the present embodiment, the configuration of the rotation amount detection unit 110 is different from that of the first embodiment. Other parts are the same as in the first embodiment.

  The rotation amount detection unit 110 has a photo interrupter 111 and a reflection unit 114b. The back surface 20a of the main body 20 has a window 20c that opens to face the supply roll 40. The window 20c is covered with a transparent member 20d such as acrylic.

  The reflecting portion 114b is formed of a metal foil or the like, and is disposed on a peripheral surface 114a of a rotating body 114 provided at an axial end of the shaft 41. A plurality of reflecting portions 114b are provided at a predetermined period in the circumferential direction. As a result, the reflection portions 114b and the non-reflection portions 114c other than the reflection portions 114b are alternately arranged on the peripheral surface 114a in the circumferential direction.

  The photo interrupter 111 is disposed on the main body 20, and the light emitting unit 111a and the light receiving unit 111b face the rotating body 114 via the window 20c.

  When the supply roll 40 rotates and light emitted from the light emitting unit 111a is applied to the reflecting unit 114b, the light is reflected and enters the light receiving unit 111b. When the light emitted from the light emitting section 111a is applied to the non-reflection section 114c, it is not reflected and does not enter the light receiving section 111b.

  Accordingly, the rotation amount detection unit 110 can detect the rotation amount of the supply roll 40 based on the number of pulses output from the light receiving unit 111b.

  According to this embodiment, the same effects as in the first embodiment can be obtained. In addition, the light emitting unit 111a and the light receiving unit 111b face the reflecting unit 114b provided on the peripheral surface of the shaft 41 via the window 20c opened in the main body unit 20. Thereby, the rotation amount detection unit 110 can be easily realized.

  Further, since the lever member 113 (see FIG. 10) is not provided, the main body 20 and the supply roll 40 can be provided closer. Therefore, the size of the air purifier 1 can be further reduced.

  In addition, since the window 20c is covered with the transparent member 20d, contact between the electrical components in the main body 20 and the fingers can be prevented, and the safety of the air cleaner 1 can be improved.

<Third embodiment>
Next, a third embodiment of the present invention will be described. FIG. 15 is a perspective view of a cap member 58 according to the third embodiment. For the sake of convenience of explanation, the same parts as those in the first embodiment shown in FIGS. 1 to 12 are denoted by the same reference numerals. In the present embodiment, the shape of the cap member 58 is different from that of the first embodiment. Other parts are the same as in the first embodiment.

  The cap member 58 has a male spline-shaped engaging portion (connecting portion) 58d protruding in the axial direction from the body portion 58a. It engages with a female spline-shaped engagement hole (not shown) formed in the cam 112 and a female spline-shaped engagement hole (not shown) formed in the spur gear 63. Thereby, the same effect as in the first embodiment can be obtained.

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

DESCRIPTION OF SYMBOLS 1 Air purifier 2 Housing 3 Suction port 4, 5 Outlet 6 Pre-filter (filter)
6a Bar material 6b Ventilation part 6c Storage part 6g Design 7 Deodorizing filter 8 Air passage 8a First branch passage 8b Second branch passage 9 Dust collection filter 10 Blower 11 Ion generator 12 Damper 14,15 Wind direction plate 17 Display unit 20 Main unit Reference Signs List 20a Back surface 20b Slit 20c Window 20d Transparent member 21 Cover 22 Holding member 23 Magnet 30 Cleaning device 40 Supply roll 41 Shaft (first shaft)
49 support member (first support portion)
49a Fitting hole 50 Take-up roll 51 Shaft (second shaft)
58 Cap member 58a Body 58b Projection 58c Engagement hole (connection part)
58d engagement part (connection part)
59 Supporting member (second supporting portion)
59a fitting hole 60 gear unit 61 bevel gear 62 bevel gear 63 spur gear (second rotation drive unit)
64 Spur gear 65 Internal gear 66 Spur gear 70 Biasing part 71 Rotating body 71a Nipping part 72 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 collecting section 91 Lid section 91a Opening section 92 Container 93 Comb section 100 Drive motor 110 Rotation amount detecting section 111 Photo interrupter 111a Light emitting section 111b Light receiving section 112 Cam (first rotation driving section)
112a cam surface 112b concave portion 113 lever member 113a pivot shaft 113b projecting piece 114 rotating body 114a peripheral surface 114b reflecting portion 114c non-reflecting portion 200 humidifying portion 201 tray 202 humidifying filter 300 tape-shaped member 400 rotating plate 401 shaft portion

The take-up roll 50 has a shaft 51 (second shaft) extending in the left-right direction, and cap members 58 are fitted to both ends of the shaft 51. One end of the take-up roll 50 is supported by a support member 59 attached to the lower end of the inner surface of the cover 21. The other end of the take-up roll 50 is connected to a drive motor 100 (second rotation drive unit, see FIG. 2) via a gear unit 60.

The inner peripheral surface of the engagement hole 58c is formed in a female spline shape. A male spline-shaped shaft portion 112d protrudes in the axial direction from the cam 112 connected to the urging portion 70 (see FIG. 3). On the spur gear 63 (see FIG. 9) of the gear unit 60, a male spline-shaped shaft portion 63b (see FIG. 9) having the same shape as the shaft portion 112d of the cam 112 projects in the axial direction. The shaft portion 112d is engaged with the engagement hole 58c, and the shaft 41 and the urging portion 70 (see FIG. 3) are connected. The shaft portion 63b is engaged with the engagement hole 58c, and the shaft 51 and the drive motor 100 (see FIG. 2) are connected.

Shaft portion 63b of the spur gear 63 engages the cap member 58, the spur gear 63 and the bevel gear 62 is connected to the winding roll 50.

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

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

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 dust collecting container 92.

DESCRIPTION OF SYMBOLS 1 Air purifier 2 Housing 3 Suction port 4, 5 Outlet 6 Pre-filter (filter)
6a Bar material 6b Ventilation part 6c Storage part 6g Design 7 Deodorizing filter 8 Air passage 8a First branch passage 8b Second branch passage 9 Dust collection filter 10 Blower 11 Ion generator 12 Damper 14,15 Wind direction plate 17 Display unit 20 Main unit Reference Signs List 20a Back surface 20b Slit 20c Window 20d Transparent member 21 Cover 22 Holding member 23 Magnet 30 Cleaning device 40 Supply roll 41 Shaft (first shaft)
49 supporting member (first support member)
49a Fitting hole 50 Take-up roll 51 Shaft (second shaft)
58 Cap member 58a Body (fitting part)
58b Projecting part 58c Engagement hole (connection part)
58d engagement part (connection part)
59 support member (second support member)
59a fitting hole 60 gear unit 61 bevel gear 62 bevel gear 63 spur gear 64 spur gear 65 internal gear 66 spur gear 70 biasing unit (first rotation drive unit)
71 Rotating body 71a Holding section 72 Rotating body 72a Claw 73 Handle 74 Connecting 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 collecting section 91 Cover section 91a Opening section 92 dust collection container 93 comb unit 100 drive motor (second rotation drive unit)
110 Rotation amount detection unit 111 Photo interrupter 111a Light emitting unit 111b Light receiving unit 112 Cam 112a Cam surface 112b Concave portion 113 Lever member 113a Pivot shaft 113b Projection piece 114 Rotating body 114a Peripheral surface 114b Reflection unit 114c Non-reflection unit 200 Humidifying unit 201 Tray
202 Humidifying filter

Claims (8)

A housing that opens the inlet and the outlet, an air passage that connects the inlet and the outlet, a blower that is disposed in the air passage, and a filter that is disposed to face the inlet. An air purifier comprising a cleaning device for cleaning the filter,
The cleaning device includes a supply roll in which the sheet-shaped filter is wound on a shaft, a take-up roll that takes up the filter, a drive motor that rotationally drives the take-up roll, and the supply roll. An urging unit that urges the take-up roll in a direction opposite to the winding direction, and a rotation amount detection unit that detects a rotation amount of the supply roll; An air purifier characterized by performing a drive control.   A main body part that opens the air outlet, a cover part that opens the suction port and is detachably disposed on the main body part and holds the supply roll, and the rotation amount detection part is provided on the main body part. The light emitting unit and the light receiving unit arranged, and a light transmitting state and a light blocking state between the light emitting unit and the light receiving unit are switched according to rotation of the supply roll, wherein: An air purifier as described.   A cam surface formed on a peripheral surface of an end portion of the shaft in the axial direction, and a lever member that slides on the cam surface and is displaced in a radial direction of the shaft are provided. 3. The air according to claim 2, wherein the light-shielding state is formed between the light-receiving unit and the light-receiving unit, and the light-transmitting state is formed by retracting from the space between the light-emitting unit and the light-receiving unit. 4. Cleaner.   The said lever member is comprised by the thin member supported so that inclination inside the said main-body part is possible, The slit through which the said lever member is penetrated was provided in the said main-body part, The Claim 2 or Claim 3 characterized by the above-mentioned. An air purifier as described.   The light-emitting unit and the light-receiving unit face the axial end of the shaft through a window opening to the main body, and a reflection unit that reflects light emitted from the light-emitting unit is provided on a peripheral surface of the shaft. The air purifier according to claim 2, wherein:   The air purifier according to any one of claims 1 to 5, wherein an error notification is performed when the supply roll does not reach a predetermined rotation amount within a predetermined time after rotating the winding roll. Machine. A housing having an inlet and an outlet, an air passage connecting the inlet and the outlet, a blower disposed in the air passage, and a filter disposed facing the inlet. An air purifier comprising a cleaning device for cleaning the filter,
The cleaning device is configured such that a supply roll having a sheet-shaped filter wound on a first shaft, a winding roll for winding the filter on a second shaft, and one end of the supply roll fitted to the supply roll. A first support member rotatably supporting the supply roll, a first rotation drive unit connected to the other end of the supply roll to rotate the supply roll, A second support member rotatably supporting the take-up roll, a second rotation drive unit connected to the other end of the take-up roll to rotate the take-up roll, both ends of the first shaft and the second shaft A plurality of cap members fitted to both ends of the
The cap member has a fitting portion that can be fitted to the first support member and the second support member, and a connection portion that can be connected to the first rotation drive unit side and the second rotation drive unit side. An air purifier characterized by the following.   The first support member and the second support member have fitting holes of the same diameter, the fitting portion is formed by an outer peripheral surface of the cap member, and an opening is formed on an axial end surface of the cap member. The shaft according to claim 7, wherein the connecting portion is formed by an engaging hole, and a shaft portion extending from the first rotation driving portion side and the second rotation driving portion side engages with the engagement hole. Air purifier.