WO2018179469A1 - Air purifier - Google Patents

Abstract

This air purifier is provided with a cleaning device (30). The cleaning device (30) has: a supply roller (40) having a sheet-like filter (6) wound on a shaft (41); a winding roller (50) for winding the filter (6); a drive motor (100) for rotationally driving the winding roller (50); a biasing section (70) for biasing the supply roller (40) in the direction opposite the winding direction of the winding roller (50); and a rotation amount detection section (110) for detecting the amount of rotation of the supply roller (40). The drive of the drive motor (100) is controlled on the basis of the result of detection by the rotation amount detection section (110).

Description

Air cleaner

This invention relates to the air cleaner provided with the cleaning apparatus which cleans a filter.

Patent Document 1 discloses a conventional air cleaner. This air cleaner has a housing that opens a suction port and a blow-out port. An air passage that connects 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 cleaner configured as described above, when the operation is started, the blower is driven and air in the room is sucked from the suction port. The air sucked from the suction port is sent out from the outlet after dust is collected by the prefilter. Thereby, the air cleaning in a living room can be performed.

In recent years, there has been a growing demand for air purifiers equipped with a cleaning device for cleaning prefilters. Patent Document 2 discloses a cleaning device that cleans a filter disposed facing an air inlet of a projector. The 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 collecting container.

A sheet-like filter is wound around the supply roll. The winding 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 winding roll motor. As a result, the take-up roll rotates by driving the take-up roll motor and winds up the filter drawn from the supply roll.

The brush body forms brush hairs radially on the shaft, and when the take-up roll rotates, the brush body rotates by driving the brush body motor, and the brush hair rubs the filter to remove dust. The dust collecting container collects dust removed from the filter by the brush body. The supply roll is rotationally driven by a supply roll motor to rewind the filter wound on the take-up roll. Thereby, dust on the filter is removed and the filter is cleaned.

Also, the cleaning device of Patent Document 2 has a detection switch. The detection switch is disposed in the vicinity of 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 take-up 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 2009-66466 A (page 8, page 9, FIG. 1) Japanese Patent No. 5627066 (page 6, page 7, FIG. 1, FIG. 4)

However, according to the cleaning device disclosed in Patent Document 2, the outer diameter of the filter varies with respect to the amount of the filter wound on the winding roll because the filter is in the form of a sheet. For this reason, there was a problem that the detection switch could not accurately detect the timing of completion of winding of the winding roll and the timing of completion of rewinding to the supply roll, and the cleaning of the filter was insufficient.

Further, according to the cleaning device of Patent Document 2, there is a problem that the cap material is mistaken and inserted into the end portion of the shaft, which lowers the assembly workability.

An object of the present invention is to provide an air purifier capable of sufficiently cleaning a filter.

Another object of the present invention is to provide an air cleaner with improved assembly workability.

To achieve the above object, the present invention provides 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 disposed in the air passage, In an air cleaner provided with a filter arranged facing the suction port and a cleaning device for cleaning the filter, the cleaning device is a supply roll in which the sheet-like filter is wound on a shaft, A winding roll that winds up the filter, a drive motor that rotationally drives the winding roll, an urging portion that biases the supply roll in a direction opposite to the winding direction of the winding roll, and A rotation amount detection unit that detects the rotation amount, and performs drive control of the drive motor based on a detection result of the rotation amount detection unit.

In the air cleaner having the above-described configuration, the present invention provides a main body portion that opens the air outlet, a cover portion that opens the suction port and is detachably disposed on the main body portion and holds the supply roll. The rotation amount detection unit includes a light emitting unit and a light receiving unit disposed on the main body unit, and a light transmission state and a light shielding state between the light emitting unit and the light receiving unit according to the rotation of the supply roll And are preferably switched.

According to the present invention, in the air cleaner configured as described above, a cam surface formed on a peripheral surface of an axial end portion of the shaft, and a lever that slides on the cam surface and displaces in the radial direction of the shaft. And the lever member is disposed between the light emitting unit and the light receiving unit to form the light shielding state, and retracts from between the light emitting unit and the light receiving unit to form the light transmitting state. It is preferable.

According to the present invention, in the air cleaner configured as described above, 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.

According to the present invention, in the air cleaner configured as described above, the light emitting unit and the light receiving unit face an end portion in the axial direction of the shaft through a window portion opened in the main body unit, and light emitted from the light emitting unit is emitted. It is preferable to provide a reflecting portion for reflecting the light on the peripheral surface of the shaft.

In the air cleaner having the above-described configuration, it is preferable that the window is covered with a transparent member.

In the air cleaner configured as described above, it is preferable to perform error notification when the winding roll is rotationally driven and the supply roll does not reach a predetermined rotation amount within a predetermined time.

In order to achieve the above object, the present invention provides a housing that opens a suction port and an air outlet, an air passage that connects the suction port and the air outlet, and a blower that is disposed in the air passage. In the air purifier provided with a filter arranged facing the suction port and a cleaning device for cleaning the filter, the cleaning device is wound with the sheet-like filter on the first shaft. A supply roll; a take-up roll that winds the filter on a second shaft; a first support member that is fitted to one end of the supply roll and rotatably supports the supply roll; and the other end of the supply roll A second rotation member that is connected to the first rotation drive unit and rotates 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 A second rotation drive unit that rotates, and a plurality of cap members fitted to both ends of the first shaft and both ends of the second shaft, and the cap member includes the first support member and the second support. It has the fitting part which can be fitted to a member, and the connection part which can be connected with the said 1st rotation drive part side and the said 2nd rotation drive part side, It is characterized by the above-mentioned.

According to the present invention, in the air cleaner configured as described above, the first support member and the second support member have fitting holes having the same diameter, and the fitting portion is formed by an outer peripheral surface of the cap member. In addition, the coupling portion is formed by an engagement hole opened on the end surface in the axial direction of the cap member, and a shaft portion extending from the first rotation drive portion side and the second rotation drive portion side serves as the engagement hole. Engagement is preferred.

According to the air cleaner of the present invention, the drive motor is driven and 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. Thereby, the timing of the end of winding of the winding roll and the timing of the end of rewinding to the supply roll can be accurately detected.

Further, according to the air cleaner of the present invention, the cleaning device includes the first rotation driving unit that rotates the supply roll and the second rotation driving unit that rotates the winding roll. The fitting part of the cap member is formed so as to be fitted to the first support member and the second support member. The connecting portion of the cap member is formed to be connectable to the first rotation driving portion and the second rotation driving portion. Thereby, the cap member distribute | arranged to the both ends of a supply roll and a winding roll can be made shared. Therefore, it is possible to reduce the cost of parts of the air cleaner and improve the assembly workability.

The front view which shows the air cleaner of 1st Embodiment of this invention. Side surface sectional drawing which shows the air cleaner of 1st Embodiment of this invention. The disassembled perspective view which shows the cleaning apparatus of the air cleaner of 1st Embodiment of this invention. The perspective view which shows the cap member of the air cleaner of 1st Embodiment of this invention. Side surface sectional drawing which shows the cap member of the air cleaner of 1st Embodiment of this invention. Side surface sectional drawing which shows the cap member of the air cleaner of 1st Embodiment of this invention. The top view which shows the pre filter of the air cleaner of 1st Embodiment of this invention. The perspective view which shows the inside of the winding roll of the cleaning apparatus of the air cleaner of 1st Embodiment of this invention, a dust collection part, and a gear unit. The expansion perspective view inside the gear unit of the cleaning device of the air cleaner of a 1st embodiment of the present invention. The side view which shows the rotation detection part of the air cleaner of 1st Embodiment of this invention. The top view which shows the rotation detection part of the air cleaner of 1st Embodiment of this invention. The disassembled perspective view of the urging | biasing part of the cleaning apparatus of the air cleaner of 1st Embodiment of this invention. The side view which shows the rotation detection part of the air cleaner of 2nd Embodiment of this invention. The top view which shows the rotation detection part of the air cleaner of 2nd Embodiment of this invention. The perspective view which shows the cap member of the air cleaner of 3rd Embodiment of this invention.

<First Embodiment>
Embodiments of the present invention will be described below with reference to the drawings. FIG.1 and FIG.2 has shown the front view and side sectional drawing of the air cleaner of 1st Embodiment. The front of the air cleaner 1 is the Y1 direction, and the rear is the Y2 direction. An arrow S indicates the air flow. The air cleaner 1 has a housing 2 that 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 portion 20 and a cover portion 21. The cover portion 21 is detachably disposed on the back surface 20 a of the main body portion 20 and opens the suction port 3. The main body 20 opens the air outlets 4 and 5 at the upper front surface and the upper surface, respectively.

The air outlets 4 and 5 are respectively provided with wind direction plates 14 and 15 that change the wind direction. The wind direction plate 14 is formed of a flat plate and is supported by a rotation shaft portion (not shown) provided on the wind direction plate 14 so as to be rotatable in the vertical direction. A plurality of vertical louvers 14 a 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 they go forward.

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

An air passage 8 that connects the suction port 3 and the blowout ports 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 arranged from the suction port 3 toward the blowout ports 4 and 5 (from the upstream to the 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 downstream from 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 path of the first branch passage 8a is larger than the cross-sectional area of the air flow path 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 rotation shaft portion 12a so as to be rotatable in the vertical direction. The damper 12 can be rotated in the direction of opening the first branch passage 8a from the closed position (see FIG. 2) (counterclockwise direction in FIG. 2). 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 in an axial direction and exhausts in a circumferential direction.

The prefilter 6 is formed of a sheet-like mesh such as polypropylene, and is disposed 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 odor components in the air to deodorize the air.

The dust collection 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 humidification unit 200 immerses the lower part of the humidification filter 202 in the water in the tray 201 and humidifies the air passing through the humidification filter 202. Thereby, humidified air is sent out from the blower outlets 4 and 5.

The ion generator 11 has an ion generation surface 11 a that generates ions when a high voltage is applied, and the ion generation surface 11 a faces the air passage 8. A voltage having an AC waveform or an impulse waveform is applied to the ion generation surface 11a. When the applied voltage of the ion generating surface 11a is a positive voltage, positive ions mainly composed of H ⁺ (H ₂ O) m are generated. When the applied 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 aggregate on the surface of airborne bacteria and odor components and surround them.

Then, as shown in the formulas (1) to (3), active species [· OH] (hydroxyl radical) and H ₂ O ₂ (hydrogen peroxide) are agglomerated and produced on the surface of a microorganism or the like by collision. Destroy airborne bacteria. Here, m ′ and n ′ are integers. Therefore, it is possible to perform sterilization and odor removal in the room by generating positive ions and negative ions and sending them out from the outlets 4 and 5.

H ⁺ (H ₂ O) m + O ₂ ⁻ (H ₂ O) n → OH + _1/2 O 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 in front of the upper surface of the main body unit 20. The operation unit 19 has a plurality of buttons (not shown), and sets the operation of the air cleaner 1 by a user operation. By operating each button, 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.

A display unit 17 is provided on the upper front of the main unit 20. The display part 17 is arrange | positioned at the right side of the blower outlet 4, for example, is comprised by the liquid crystal panel.

Further, the cover unit 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, 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 respectively arranged on the upper part and the lower part of the cover part 21 and hold both ends of the prefilter 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 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 on 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 portion of the inner surface of the cover portion 21. The other end of the supply roll 40 is connected to an urging unit 70 (first rotation driving unit) via a cam 112 described later.

Also, 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 disposed at a position facing the magnet of the supply roll 40 on the back surface 20 a of the main body 20.

The winding roll 50 has a shaft 51 (second shaft) extending in the left-right direction, and cap members 58 are fitted on 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 portion of the inner surface of the cover portion 21. The other end of the supply roll 40 is connected to a drive motor 100 (second rotation drive unit, see FIG. 2) via a gear unit 60.

The cap members 58 disposed at both ends of the supply roll 40 and both ends of the take-up roll 50 are formed in the same shape. 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 includes a cylindrical barrel portion 58a (fitting portion), a protruding portion 58b protruding in the axial direction from the barrel portion 58a, and an engagement hole 58c (connecting portion) opening in the axial end surface of the protruding portion 58b. And have.

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. The fitting hole 49a opened in the support member (first support member) 49 and the 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 58 a is opened and is fitted to one end portions of the shaft 41 and the shaft 51. The body 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 supported rotatably.

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). The spur gear 63 (see FIG. 9) of the gear unit 60 projects in the axial direction a male spline-shaped shaft portion 63a (see FIG. 9) having the same shape as the shaft portion 112d of the cam 112. The shaft portion 112d engages with the engagement hole 58c, and the shaft 41 and the urging portion 70 (see FIG. 3) are connected. Further, the shaft portion 63a engages 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 on both ends of the supply roll 40 and the take-up roll 50 can be shared. Therefore, it is possible to reduce the parts cost of the air cleaner 1 and improve the assembly workability.

FIG. 7 shows a plan view of the pre-filter 6. The pre-filter 6 has bar members 6 a that extend in the left-right direction at both ends in the winding direction W and are held by the supply roll 40 and the winding roll 50. In addition, the prefilter 6 has a ventilation portion 6 b disposed facing the suction port 3 when the cleaning device 30 is stopped, and a storage portion 6 c sent out from the supply roll 40 when the cleaning device 30 is driven.

A symbol 6g visible from the suction port 3 is provided on the storage portion 6c so as to be distinguished from the ventilation portion 6b. In the present embodiment, red letters “cleaning” are used as the symbol 6g. The design 6g is not particularly limited, and may be, for example, a striped pattern having a color different from that of the ventilation portion 6b.

In FIG. 3, the brush body 80 is disposed in a dust collecting portion 90 that is detachably attached to the cover portion 21. The brush body 80 has a shaft 81 supported at both ends in the axial direction by the dust collecting portion 90, and rotates when the cleaning device 30 is driven to remove dust on the prefilter 6 as will be described later. A spur gear 68 is provided at one end (right end) of the shaft 81, and a bristle bundle 82 is implanted on the peripheral surface of the shaft 81 in a spiral manner at a predetermined interval.

The dust collection unit 90 includes a lid 91, a dust collection container 92, and a comb unit 93, and is detachably attached to the cover unit 21. The dust collecting container 92 is formed of a transparent resin, and has an upper surface opened to support the brush body 80 on both sides. The lid portion 91 opens an opening portion 91 a that opens over the left and right ends, and covers the upper surface of the dust collecting container 92. The bristle bundle 82 of the brush body 80 is exposed to the outside from the opening 91a. The comb portion 93 is formed to extend in the left-right direction, and is arranged in the dust collecting container 92 with the tooth tip facing upward. The bristles 82 of the rotating brush body 80 abut the tooth tips of the comb portion 93. The dust adhering to the bristle bundle 82 is removed from the bristle bundle 82 by the comb portion 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 accumulated in the dust collecting container 92. At this time, since the dust collecting container 92 is formed of a transparent resin, the user can easily grasp the amount of dust in the dust collecting container 92.

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

Further, a presser member 22 is disposed in front of the prefilter 6 with a predetermined gap. The pressing member 22 is detachably attached to the cover portion 21. The prefilter 6 can be stably disposed along the suction port 3 by the pressing member 22, and slackening of the prefilter 6 due to the suction airflow can be prevented.

FIG. 8 is a perspective view showing the inside of the winding 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 portion 21 (see FIG. 3).

The bevel gear 61 is arranged with its axial direction in the front-rear direction, and has a fitting hole 61a on the shaft that fits into a rotating 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 integrally formed with the bevel gear 62.

The shaft portion 63 a of the spur gear 63 engages 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 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. A spur gear 68 provided at one end of the brush body 80 meshes with a spur gear 67.

When the drive motor 100 is driven, the take-up roll 50 is rotated via the bevel gear 61 and the bevel gear 62. The brush body 80 is rotated through the spur gear 64, the internal gear 65, the spur gear 66, the spur gear 67, and the spur gear 68 by the rotation of the spur gear 63 integrated with the bevel gear 62. Since the spur gear 63 integral with the bevel gear 62 and the spur gear 64 connected to the brush body 80 mesh with each other, the brush body 80 disposed in parallel to the winding roll 50 can be easily rotated.

At this time, since the internal gear 65 integral with the spur gear 64 is provided, the spur gear 68 on the rotation shaft of the brush body 80 can be disposed between the rotation shaft of the spur gear 63 and the rotation shaft 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 placed close to the winding roll 50.

Note that the bevel gears 61 and 62 may be cross-axis gears. Each spur gear may be a parallel shaft gear, and a helical gear or the like may be used.

In addition, the air cleaner 1 is provided with a rotation amount detection unit 110 that detects the rotation amount of the supply roll 40. FIG. 10 shows a side view of the rotation amount detection unit 110, and FIG. 11 shows 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 a cap member 58 and rotates concentrically with the shaft 41. On the circumferential surface of the cam 112, a cam surface 112a is formed in which a plurality of concave portions 112b that are recessed in the radial direction are arranged at a predetermined cycle in the circumferential direction.

The lever member 113 has a thin plate shape and is supported to be tiltable inside the main body 20 by a shaft portion 113a at the front end in the front-rear direction (Y1-Y2 direction). Further, the lever member 113 can be pivoted so as to reciprocate in the vertical direction with the pivot shaft 113a as a fulcrum.

The lever member 113 extends toward the supply roll 40 through a slit 20b formed on the back surface 20a of the main body portion 20, and a protruding piece 113b protruding 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. The other end of the spring (elastic member) whose one end is fixed to the main body 20 is fixed to the upper portion of the lever member 113, and the protruding piece 113b is 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 placed close to each other, and the air cleaner 1 can be downsized. In addition, since the lever member 113 is formed of a thin member and the slit 20b through which the lever member 113 is inserted is provided in the main body portion 20, the width of the slit 20b can be reduced. Thereby, since a user's finger | toe is not inserted from the slit 20b, the contact with the electrical component in the main-body part 20 and a finger | toe can be prevented and the safety | security of the air cleaner 1 can be improved. Further, it is possible to prevent dust from entering the main body 20 through the slit 20b and causing failure of the electrical components.

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

That is, when the lever member 13 is disposed between the light emitting unit 111a and the light receiving unit 111b, the light emitting unit 111a and the light receiving unit 111b are shielded from light. Further, as indicated 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 light emitting unit 111a and the light receiving unit 111b are in 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 transmission 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 can be formed in a small diameter, and the lever member 113 can be arranged only in one radial direction (upward in this embodiment) with respect to the cam 112. Therefore, the air cleaner 1 can be downsized.

FIG. 12 is an exploded perspective view of the urging unit 70 of the cleaning device 30. The urging unit 70 includes a rotating body 71 and a rotating body 72 housed in housings 78 and 79 that are screwed together. A sandwiching portion 71a is projected from one end surface of the rotating body 71 in the axial direction, and a groove portion 71b is provided on the other end surface. A locking portion 48 a provided on one end surface of the locking member 48 connected to the cam 112 is fitted in the groove portion 71 b. Thereby, 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.

Rotating body 72 houses a spring 75 inside the rotating body 71 side. One end (inner end) of the spring 75 is clamped by the clamping portion 71 a 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 rotator 71 rotates clockwise with respect to the rotator 72 as viewed from the right side (as viewed from the direction of arrow A), the urging force of the spring 75 increases. That is, when the rotator 72 rotates clockwise with respect to the rotator 71 as viewed from the direction of the arrow A, the urging force of the spring 75 is reduced.

A plurality of claws 72a are provided at a predetermined interval on the outer peripheral surface on the outer side (right side) of the rotating body 72 in the axial direction. A stopper 77 is pivotally supported in the housing 78, and the stopper 77 is biased by a torsion coil spring 77a in a direction in which the rotating body 72 is pressed. As a result, the rotating body 72 is restricted from rotating clockwise to reduce the urging force of the mainspring 75 when viewed from the direction of the arrow A by the engagement between the stopper 77 and the claw 72a.

An opening 78a is opened on the right side surface of the housing 78, and a cylindrical handle 73 is disposed so as to cover the opening 78a. In the housing 78, a flange 73a having a diameter larger than that of the opening 78a is disposed. 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 disposed on the inner side (left side) of the flange portion 73a in the axial direction. 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 74 c are formed at predetermined intervals on the peripheral surface of the connecting member 74. A plurality of radially extending ribs 72c are formed on the outer end of the rotating body 72 in the axial direction so as to fit into the notches 74c. 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 the outer (right) surface of the connecting member 74 in the axial direction. The inclined portion 74a is formed to be gradually higher counterclockwise as viewed from the direction of the arrow A. The ribs 74b extend radially adjacent to the top of the inclined portion 74a and are formed higher than the top.

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

When the handle 73 is rotated clockwise as viewed from the direction of the arrow A, the rib 74b is engaged with the rib 73b and the protrusion of the housing 78 is engaged. 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 the arrow A, the rib 73b slides on the inclined portion 74a. For this reason, the connecting member 74 moves inward in the axial direction against the urging force of the compression spring 76, and the rib 74 b is separated from the protruding portion of the housing 78 in the axial direction. As a result, the handle 73 can be rotated, and the rib 74b engages with the rib 73b, and the rotating body 72 rotates in the direction of increasing the urging force of the spring 75. That is, the rotating body 72 is rotated by the handle 73.

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

And the ions generated by the ion generator 11 are contained in the air. The air containing ions is blown into the living room from one or both of the outlets 4 and 5. Thereby, the ventilation operation | movement of the air cleaner 1 is performed and the air cleaning of a living room is performed.

Next, the operation of the cleaning device 30 will be described. When the predetermined time comes, the cleaning device 30 is driven and the cleaning operation by the cleaning device 30 is started. The cleaning operation is started when, for example, the cumulative operation time of the air cleaner 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 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 (viewed from the direction of arrow A). As a result, the take-up roll 50 rotates clockwise as viewed from the right side, and the prefilter 6 is pulled out from the supply roll 40 and taken up.

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

At this time, the rotation direction of the winding roll 50 and the rotation direction of the brush body 80 are the same direction. For this reason, the brush bristle bundle 82 of the brush body 80 slides on the prefilter 6 from the direction opposite to the traveling direction of the prefilter 6. Therefore, the brush body 80 can reliably remove dust on the pre-filter 6.

Further, it is desirable that the peripheral speed of the brush body 80 is larger than the peripheral speed of the winding roll 50. Thereby, the contact length in the circumferential direction of the bristle bundle 82 on the prefilter 6 can be made longer than the period in which the bristle bundle 82 contacts, and the bristle bundle 82 can be brought into contact with the prefilter 6 without any gap. .

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

When the prefilter 6 is taken up by the take-up roll 50, the rotating body 71 (see FIG. 8) of the urging unit 70 connected to the supply roll 40 is clockwise when viewed from the right side (viewed from the direction of arrow A). Rotate to. Thereby, the mainspring 75 is wound, and the urging force of the mainspring 75 is increased.

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. Thereby, the user can easily recognize that the cleaning device 30 is being driven. For this reason, it can prevent that a user misidentifies that the air blower 10 stopped by failure. Note that 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 as detected by the rotation amount detection unit 110, the drive motor 100 is reversed. Thereby, the bevel gear 61 rotates in a direction opposite to that at the time of winding (clockwise direction in the present embodiment). At this time, the winding roll 50 and the brush body 80 rotate counterclockwise when viewed from the right side.

When the pre-filter 6 is wound by the winding roll 50, the urging force of the mainspring 75 is larger than that before winding. For this reason, when the drive motor 100 is reversed, the rotating body 71 rotates counterclockwise as viewed from the right side surface by the restoring force of the mainspring 75. Thereby, the prefilter 6 is rewound onto the supply roll 40.

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

The drive motor 100 is drive-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 winding of the winding roll 50 and the timing of the end of rewinding to the supply roll 40 can be detected accurately.

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

When the supply roll 40 is dropped or the bar material 6a of the prefilter 6 is detached 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 rotational load of the supply roll 40 increases due to dust accumulated on the prefilter 6, the prefilter 6 is not normally rewound onto the supply roll 40.

In these cases, the control unit (not shown) determines that the supply roll 40 does not rotate normally in conjunction with the take-up roll 50 and issues an error notification. Thereby, the user can easily recognize that the cleaning of the prefilter 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 unit 90 from the cover unit 21 and discard the dust accumulated in the container 92.

Further, the supply roll 40 to which one end of the prefilter 6 is attached is attached to the cover portion 21 at the time of replacement. Then, the lower end of the prefilter 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 unit 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. Thereby, the pre-filter 6 is wound 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 surely pass through the prefilter 6.

According to the present embodiment, the drive motor 100 is driven 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 winding of the winding roll 50 and the timing of the end of 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.

Further, the rotation amount detection unit 110 includes a light emitting unit 111 a and a light receiving unit 111 b arranged in the main body unit 20, and a light transmission state and a light shielding between the light emitting unit 111 a and the light receiving unit 111 b according to the rotation of the supply roll 40. The state can be switched. Thereby, the rotation amount detection unit 110 can be easily realized.

Further, the lever member 113 forms a light shielding state and a light transmission state by the displacement of the lever member 113 sliding on the cam surface 112a formed on the peripheral surface of the cam 112 integral with the shaft 41. Thereby, the rotating cam 112 can be formed in a small diameter, and the lever member 113 can be arranged only in one radial direction with respect to the cam 112. Therefore, the air cleaner 1 can be downsized.

Also, the lever member 113 is made of a thin member that is tiltably supported inside the main body 20, and the main body 20 is provided with a slit 20 b through which the lever member 113 is inserted. Thereby, the supply roll 40 and the main-body part 20 can be installed closely, and the air cleaner 1 can be reduced in size. Moreover, the electrical component in the main-body part 20 and a finger can be prevented from contacting, and the safety of the air cleaner 1 can be improved.

Further, when the take-up roll 50 is driven to rotate and the supply roll 40 does not reach a predetermined rotation amount within a predetermined time, an error notification is performed. Thereby, the user can easily recognize that the cleaning of the prefilter 6 by the cleaning device 30 has not been completed.

Further, the cleaning device 30 includes an urging unit 70 (first rotation driving unit) that rotates the supply roll 40 and a driving motor 100 (second rotation driving unit) that rotates the winding roll 50. The body portion 58a (fitting portion) of the cap member 58 is formed so as to be able to fit to the support member (first support member) 49 and the support member (second support member) 59. The engaging hole 58c (connecting portion) of the cap member 58 is formed so as to be connectable to the cam 112 on the biasing portion 70 side and the spur gear 63 on the drive motor 100 side. Thereby, the cap member 58 arrange | positioned at the both ends of the supply roll 40 and the winding roll 50 can be made shared. Therefore, it is possible to reduce the parts cost of the air cleaner 1 and improve the assembly workability.

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 of the second embodiment. For convenience of explanation, the same reference numerals are given to the same parts as those in the first embodiment shown in FIGS. 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 those in the first embodiment.

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

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

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

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

Thereby, 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 effect as that of the first embodiment can be obtained. Further, the light emitting portion 111 a and the light receiving portion 111 b face the reflecting portion 114 b provided on the peripheral surface of the shaft 41 through the window portion 20 c opened in the main body portion 20. Thereby, the rotation amount detection unit 110 can be easily realized.

Also, since the lever member 113 (see FIG. 10) is not provided, the main body 20 and the supply roll 40 can be placed closer together. Therefore, the air cleaner 1 can be further downsized.

Moreover, since the window part 20c is covered with the transparent member 20d, the electrical component in the main-body part 20 and a finger can be prevented from contacting with each other, 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 shows a perspective view of the cap member 58 of the third embodiment. For convenience of explanation, the same reference numerals are given to the same parts as those in the first embodiment shown in FIGS. 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 those in the first embodiment.

The cap member 58 has a male spline-like engaging portion (connecting portion) 58d protruding from the body portion 58a in the axial direction. It engages with a female spline-like engagement hole (not shown) formed in the cam 112 and a female spline-like engagement hole (not shown) formed in the spur gear 63. Thereby, the effect similar to 1st Embodiment can be acquired.

The present invention can be used for an air purifier equipped with a cleaning device for cleaning a filter.

DESCRIPTION OF SYMBOLS 1 Air cleaner 2 Case 3 Suction inlet 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 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 part 20 Main part 20a Back surface 20b Slit 20c Window portion 20d Transparent member 21 Cover portion 22 Holding member 23 Magnet 30 Cleaning device 40 Supply roll 41 Shaft (first shaft)
49 Support member (first support part)
49a Fitting hole 50 Winding roll 51 Shaft (second shaft)
58 Cap member 58a Body part 58b Protrusion part 58c Engagement hole (connection part)
58d engagement part (connection part)
59 Support member (second support part)
59a Fitting hole 60 Gear unit 61 Bevel gear 62 Bevel gear 63 Spur gear (second rotational drive unit)
64 spur gear 65 internal gear 66 spur gear 70 urging portion 71 rotating body 71a holding portion 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 hair bundle 90 Dust collecting part 91 Lid part 91a Opening 92 Container 93 Comb part 100 Drive motor 110 Rotation amount detection part 111 Photo interrupter 111a Light emission part 111b Light reception part 112 Cam (first rotation drive part)
112a Cam surface 112b Recessed portion 113 Lever member 113a Pivoting shaft 113b Projection piece 114 Rotating body 114a Circumferential surface 114b Reflecting portion 114c Non-reflecting portion 200 Humidifying portion 201 Tray 202 Humidifying filter 300 Tape-like member 400 Rotating plate 401 Shaft portion

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 arranged in the air passage, and a filter that faces the inlet In an air cleaner comprising a cleaning device for cleaning the filter,
The cleaning device includes a supply roll in which the sheet-like 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, and the drive motor based on a detection result of the rotation amount detection unit The air cleaner characterized by performing drive control of. A main body portion that opens the air outlet; and a cover portion that opens the suction port and is detachably disposed on the main body portion and holds the supply roll. The light-emitting part and the light-receiving part are arranged, and the light-transmitting state and the light-shielding state between the light-emitting part and the light-receiving part are switched according to the rotation of the supply roll. The air cleaner described. A cam surface formed on a circumferential surface of an end portion in the axial direction of the shaft; and a lever member that slides on the cam surface and displaces in a radial direction of the shaft. 3. The air according to claim 2, wherein the air-shielding state is formed by being arranged between the light-receiving unit, and the light-transmitting state is formed by retreating from between the light-emitting unit and the light-receiving unit. Cleaner. The said lever member consists of a thin member supported so that inclination is possible inside the said main-body part, 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. The air cleaner described. The light-emitting part and the light-receiving part face the axial end of the shaft through a window part that opens in the main body part, and a reflecting part that reflects the light emitted from the light-emitting part is provided on the peripheral surface of the shaft The air cleaner according to claim 2, wherein The air purifier according to any one of claims 1 to 5, wherein an error is notified when the winding roll is driven to rotate and the supply roll does not reach a predetermined rotation amount within a predetermined time. Machine. A housing that opens the inlet and the outlet, an air passage that connects the inlet and the outlet, a blower that is arranged in the air passage, and a filter that faces the inlet In an air cleaner comprising a cleaning device for cleaning the filter,
The cleaning device is fitted to one end of the supply roll, a supply roll in which the sheet-like filter is wound on the first shaft, a winding roll for winding the filter on the second shaft, and the supply roll A first support member that rotatably supports the supply roll, a first rotation drive unit that is connected to the other end of the supply roll and rotates the supply roll, and is fitted to one end of the take-up roll and the winding A second support member that rotatably supports the take-up roll; a second rotation drive unit that is connected to the other end of the take-up roll to rotate the take-up roll; and 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 connecting portion that can be connected to the first rotation driving portion side and the second rotation driving portion side. An air purifier characterized by. The first support member and the second support member have fitting holes having the same diameter, and the fitting portion is formed by the outer peripheral surface of the cap member, and the opening is formed on an end surface in the axial direction of the cap member. The shaft portion extending from the first rotation driving unit side and the second rotation driving unit side is formed by the engaging hole to be engaged, and the shaft portion is engaged with the engagement hole. Air purifier.

Images