JP6924258B2 - Air cleaner - Google Patents

Description

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

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

When the operation of the air purifier having the above configuration is started, the blower is driven and the air in the living room is sucked from the suction port. The air sucked from the suction port is sent out from the air outlet after the dust is collected by the pre-filter. As a result, the air in the living room can be cleaned.

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

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

The brush body radially forms brush bristles on the shaft, and when the take-up roll is rotated, the brush bristles are rotated by the drive of the brush body motor, and the brush bristles rub against the filter to remove dust. The dust collection container collects dust removed from the filter by the brush body. The feed roll is rotationally driven by a motor for the feed roll to rewind the filter wound on the take-up roll. This removes dust on the filter and cleans the filter.

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

Japanese Unexamined Patent Publication No. 2009-666666 (pages 8, 9, and 1) Japanese Patent No. 5627066 (pages 6, 7, 7, 1 and 4)

However, according to the cleaning device of Patent Document 2, since the filter is in the form of a sheet, the outer diameter varies with respect to the winding amount of the filter wound on the winding roll. Therefore, there is a problem that the detection switch cannot accurately detect the timing of the end of winding the take-up roll and the timing of the end of 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 portion of the shaft, and there is a problem that the assembly workability is lowered.

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 purifier with improved assembly workability.

In order to achieve the above object, the present invention comprises a housing that opens a suction port and an air outlet, an air passage that connects the suction port and the air outlet, a blower arranged in the air passage, and the above. In an air purifier including 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-shaped filter is wound on a shaft. A take-up roll for winding the filter, a drive motor for rotationally driving the take-up roll, an urging portion for urging the supply roll in the direction opposite to the take-up direction by the take-up roll, and the supply roll. It has a rotation amount detection unit that detects the rotation amount, and is characterized in that the drive control of the drive motor is performed based on the detection result of the rotation amount detection unit.

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

Further, according to the present invention, in the air purifier having the above configuration, a cam surface formed on the peripheral surface of the axial end of the shaft and a lever that slides on the cam surface and is displaced in the radial direction of the shaft. A member is provided, and the lever member is arranged between the light emitting portion and the light receiving portion to form the light shielding state, and retracts from between the light emitting portion and the light receiving portion to form the light transmitting state. Then it is preferable.

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

Further, according to the present invention, in the air purifier having the above configuration, the light emitting portion and the light receiving portion face the axial end portion of the shaft through the window portion opening to the main body portion, and the emitted light of the light emitting portion. It is preferable to provide a reflecting portion that reflects the above on the peripheral surface of the shaft.

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

Further, in the air purifier having the above configuration, it is preferable that the take-up roll is rotationally driven to notify an error when the supply roll does not reach a predetermined rotation amount within a predetermined time.

Further, in order to achieve the above object, the present invention includes 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 arranged in the air passage. In an air purifier including a filter arranged facing the suction port and a cleaning device for cleaning the filter, the cleaning device is wound around the first shaft in the form of a sheet. A supply roll, a take-up roll that winds the filter on a second shaft, a first support member that fits on one end of the supply roll and rotatably supports the supply roll, and the other end of the supply roll. In addition to the first rotation drive unit that is connected to and rotates the supply roll, the second support member that is fitted to one end of the take-up roll to rotatably support the take-up roll, and the take-up roll. The cap member has a second rotation drive unit connected to an end to rotate the take-up roll, and a plurality of cap members fitted to both ends of the first shaft and both ends of the second shaft. It is characterized by having 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 drive unit side and the second rotation drive unit side. ..

Further, in the present invention, in the air purifier having the above configuration, 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. At the same time, the connecting portion is formed by the engaging hole opened on the axial end surface of the cap member, and the shaft portion extending from the first rotation driving portion side and the second rotation driving portion side is formed in the engaging hole. It is preferable to engage.

According to the air purifier 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 take-up roll and the timing of the end of rewinding to the supply roll can be accurately detected.

Further, according to the air purifier of the present invention, the cleaning device includes a first rotation drive unit for rotating the supply roll and a second rotation drive unit for rotating the take-up roll. The fitting portion 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 so as to be connectable to the first rotation driving portion and the second rotation driving portion side. Thereby, the cap members arranged at both ends of the supply roll and the take-up roll can be made common. Therefore, it is possible to reduce the parts cost of the air purifier and improve the assembly workability.

Front view showing the air purifier of the first embodiment of the present invention Side sectional view showing an air purifier according to the first embodiment of the present invention. An exploded perspective view showing a cleaning device for the air purifier according to the first embodiment of the present invention. A perspective 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. Side sectional view showing a cap member of the air purifier according to the first embodiment of the present invention. Top view showing the pre-filter of the air purifier of the 1st Embodiment of this invention. A perspective view showing the inside of a take-up roll, a dust collector, and a gear unit of the cleaning device of the air purifier according to the first embodiment of the present invention. Enlarged perspective view of the inside of the gear unit of the cleaning device for the air purifier according to the first embodiment of the present invention. Side view which shows the rotation detection part of the air purifier of 1st Embodiment of this invention. Top view showing the rotation detection part of the air purifier of the 1st Embodiment of this invention 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. Side view which shows the rotation detection part of the air purifier of the 2nd Embodiment of this invention. Top view showing the rotation detection part of the air purifier of the 2nd Embodiment of this invention A perspective view showing a cap member of the air purifier according to the third embodiment of the present 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 in the Y1 direction, and the rear is in the Y2 direction. The arrow S indicates the air flow. The air purifier 1 has a housing 2 that is installed on the floor or the like in a living room by opening the suction ports 3 and the 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 arranged with respect to the back surface 20a of the main body portion 20 and opens the suction port 3. The main body 20 opens the air outlets 4 and 5 to the upper front surface and the upper surface, respectively.

Wind direction plates 14 and 15 for varying the wind direction are provided at the air outlets 4 and 5, respectively. The wind direction plate 14 is made of a flat plate, and is rotatably supported in the vertical direction by a rotation shaft portion (not shown) provided on the wind direction plate 14. A plurality of vertical louvers 14a are vertically installed on the lower surface of the wind direction plate 14 side by side in the left-right direction. The vertical louvers 14a at both end ends are inclined outward in the left-right direction toward the front.

The wind direction plate 15 is made of a flat plate, and is rotatably supported in the vertical direction by a rotation shaft portion 15b provided at the front portion of the wind direction plate 15. A plurality of vertical louvers 15a are vertically installed on the lower surface of the wind direction plate 15 side by side in the left-right direction. The vertical louvers 15a at both end ends are inclined outward in the left-right direction toward the rear.

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

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

The air passage 8 has a first branch passage 8a and a second branch passage 8b that branch downstream of the ion generator 11. The first branch passage 8a and the second branch passage 8b communicate with the outlets 4 and 5, respectively, and the cross-sectional area of the air flow path of the first branch passage 8a is based on 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 rotatably supported in the vertical direction by the rotating shaft portion 12a. The damper 12 can rotate from the closed position (see FIG. 2) to the opening direction (counterclockwise direction in FIG. 2) of the first branch passage 8a. The damper 12 changes the air volume balance of the first branch passage 8a and the second branch passage 8b.

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

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

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

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

The humidifying section 200 immerses the lower part of the humidifying filter 202 in the water in the tray 201 to humidify the air passing through the humidifying filter 202. As a result, humidified air is sent out from the outlets 4 and 5.

The ion generator 11 has an ion generation surface 11a that generates ions by applying a high voltage voltage, and the ion generation surface 11a faces the inside of the air passage 8. A voltage composed of an AC waveform or an impulse waveform is applied to the ion generation surface 11a. Generates positive ions consisting mainly ^H + _(H 2 O) m when the applied voltage of the ion generating surface 11a is a positive voltage, primarily in the case of negative voltage _O ² - negative ions consisting of _(H 2 O) n 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 equation (1) to (3), which is the active species [· OH] (hydroxyl radical) and _H 2 _{O 2} (hydrogen peroxide) to generate aggregated on the surface of such microorganisms by a collision Destroy airborne bacteria. Here, m'and n'are integers. Therefore, by generating positive ions and negative ions and sending them out from the outlets 4 and 5, it is possible to sterilize the living room and remove the odor.

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

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

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

Further, the cover portion 21 is provided with a cleaning device 30 for cleaning the pre-filter 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 collecting unit 90, and a drive motor 100 (see FIG. 2).

The supply roll 40 and the take-up roll 50 are arranged at the upper part and the lower part of the cover portion 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, is sent out from the supply roll 40 when the cleaning device 30 is driven, and is wound around the winding 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 of the inner surface of the cover portion 21. The other end of the supply roll 40 is connected to the urging portion 70 (first rotation drive portion) via a cam 112 described later.

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

The take-up 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 of the inner surface of the cover portion 21. The other end of the take-up roll 50 is connected to the drive motor 100 (second rotation drive unit, see FIG. 2) via the gear unit 60.

The cap members 58 arranged at both ends of the supply roll 40 and both ends of the take-up roll 50 are formed to have 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 projecting from the body portion 58a in the axial direction, and an engaging hole 58c (connecting portion) opening in the axial end surface of the projecting 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 58a is opened, and the body portion 58a is fitted to one end portion of the shaft 41 and the shaft 51. Further, 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 projects in the axial direction from the cam 112 connected to the urging portion 70 (see FIG. 3). A male spline-shaped shaft portion 63b (see FIG. 9) having the same shape as the shaft portion 112d of the cam 112 protrudes in the axial direction from the spur gear 63 (see FIG. 9) of the gear unit 60. The shaft portion 112d engages with the engagement hole 58c to connect the shaft 41 and the urging portion 70 (see FIG. 3). Further, the shaft portion 63b is engaged with the engaging hole 58c to connect the shaft 51 and the drive motor 100 (see FIG. 2).

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

FIG. 7 shows a plan view of the pre-filter 6. The pre-filter 6 has a bar material 6a extending in the left-right direction at both ends of the winding direction W and being 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.

A symbol 6g that can be visually recognized from the suction port 3 is provided on the storage portion 6c so as to be distinguished from the ventilation portion 6b. In this embodiment, the red letters "cleaning" are used as the design 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 arranged in the dust collecting portion 90 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. A spur gear 68 is provided at one end (right end) of the shaft 81, and brush bristles 82 are spirally planted at predetermined intervals on the peripheral surface of the shaft 81.

The dust collecting portion 90 has a lid portion 91, a dust collecting container 92, and a comb portion 93, and is detachably arranged with respect to the cover portion 21. The dust collecting container 92 is made of a transparent resin, and the upper surface is opened to support the brush body 80 on both sides. The lid portion 91 opens an opening 91a that opens over the left and right ends, and covers the upper surface of the dust collecting container 92. The brush bristles 82 of the brush body 80 are exposed to the outside through the opening 91a. The comb portion 93 is formed so as to extend in the left-right direction, and is arranged in the dust collecting container 92 with the tooth tips facing upward. The brush bristles 82 of the rotating brush body 80 come into contact with the tooth tips of the comb portion 93. Dust adhering to the brush bristles 82 is removed from the brush bristles 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 collected in the dust collection 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 arranged in the main body 20 of the housing 2, and the rotation shaft (not shown) of the drive motor 100 projects rearward from the back surface 20a of the main body 20. A stepping motor is used as the drive motor 100.

Further, a pressing member 22 is arranged in front of the pre-filter 6 with a predetermined gap. The pressing member 22 is detachably attached to the cover portion 21. The presser member 22 can stably arrange the pre-filter 6 along the suction port 3 to prevent the pre-filter 6 from loosening due to the suction air flow.

FIG. 8 is a perspective view showing the inside of the take-up roll 50, the dust collector 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 has 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 in the front-rear direction in the axial direction, and has a fitting hole 61a on the shaft that fits into the 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 concentrically with the bevel gear 62.

The shaft portion 63b 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 take-up 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 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.

By driving the drive motor 100, the take-up roll 50 rotates via the bevel gear 61 and the bevel gear 62. Further, the rotation of the spur gear 63 integrated with the bevel gear 62 causes the brush body 80 to rotate via the spur gear 64, the internal gear 65, the spur gear 66, the spur gear 67, and the spur gear 68. Since the spur gear 63 integrated with the bevel gear 62 and the spur gear 64 connected to the brush body 80 mesh with each other, the brush body 80 arranged in parallel with the take-up 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 rotating shaft of the brush body 80 can be arranged between the rotating shaft of the spur gear 63 and the rotating shaft of the spur gear 64. can. As a result, the brush body 80 that slides on the pre-filter 6 on the take-up roll 50 can be easily arranged close to the take-up roll 50.

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

Further, the air purifier 1 is provided with a rotation amount detecting unit 110 that detects the rotation amount of the supply roll 40. FIG. 10 shows a side view of the rotation amount detecting unit 110, and FIG. 11 shows a top view of the rotation amount detecting unit 110. The rotation amount detecting 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 111a and the light receiving unit 111b 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 peripheral surface of the cam 112, a cam surface 112a is formed in which a plurality of concave portions 112b recessed in the radial direction are arranged in the circumferential direction at a predetermined cycle.

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

The lever member 113 extends toward the supply roll 40 side through a slit 20b formed in 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 arranged above the cam surface 112a and comes into contact with the cam surface 112a by its own weight. Even if the other end of the spring (elastic member) whose one end is fixed to the main body 20 is fixed to the upper part of the lever member 113 and the protruding piece 113b is brought into contact with the cam surface 112a by utilizing 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 purifier 1 can be miniaturized. Further, since the lever member 113 is formed of a thin member and the main body portion 20 is provided with a slit 20b through which the lever member 113 is inserted, the width of the slit 20b can be narrowed. As a result, since the user's fingers are not inserted through the slit 20b, 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, it is possible to prevent dust from entering the main body 20 through the slit 20b and causing the electrical components to break down.

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. As a result, the light transmitting state and the light blocking 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 arranged 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-shielding state. Further, as shown by the alternate long and short dash line in FIG. 10, when the lever member 13 retracts 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 the light received by the light receiving unit 111b. As a result, the rotation amount detection unit 110 can detect the rotation amount of the supply roll 40 by the number of pulses output from the light receiving unit 111b.

Further, the displacement of the lever member 113 sliding on the cam 112 integrated with the supply roll 40 switches between the light transmitting state and the light blocking state between the light emitting unit 111a and the light receiving unit 111b. Therefore, the rotating cam 112 can be formed to have a small diameter, and the lever member 113 can be arranged only in one direction (upper in the present embodiment) in the radial direction with respect to the cam 112. Therefore, the size of the air purifier 1 can be reduced.

FIG. 12 shows 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 that are screwed together. A holding portion 71a is provided so as to project from one end surface of the rotating body 71 in the axial direction, and a groove portion 71b is provided on the other end surface. A locking portion 48a provided on one end surface of the locking member 48 connected to the cam 112 is fitted in the groove portion 71b. As a result, 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 portion 70.

The rotating body 72 houses the royal fern 75 inside the rotating body 71 side. One end (inner end) of the royal fern 75 is sandwiched by the sandwiching portion 71a 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 with respect to the rotating body 72 when viewed from the right side (viewed from the direction of arrow A), the urging force of the royal fern 75 increases. That is, when the rotating body 72 rotates clockwise with respect to the rotating body 71 when viewed from the direction of the arrow A, the urging force of the royal fern 75 decreases.

A plurality of claws 72a are provided at predetermined intervals on the outer (right side) outer peripheral surface of the rotating body 72 in the axial direction. 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. 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 arrow A by engaging the stopper 77 with the claw 72a.

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

A connecting member 74 is arranged inside the housing 78 on the inner side (left side) of the flange portion 73a in the axial direction. A compression spring 76 is arranged between the rotating body 72 and the connecting member 74, and the connecting member 74 is urged to the outside (right side) 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 notch 74c are formed at the outer end portion of the rotating body 72 in the axial direction. As a result, the connecting member 74 rotates integrally with the rotating body 72.

The connecting member 74 is formed to have a diameter larger than that of the flange portion 73a and the opening portion 78a. A plurality of inclined portions 74a and a plurality of ribs 74b are provided at predetermined intervals on the outer (right side) surface of the connecting member 74 in the axial direction. The inclined portion 74a is gradually formed higher in the counterclockwise direction when 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.

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

When the handle 73 is rotated clockwise when viewed from the direction of arrow A, the rib 74b engages with the rib 73b and engages with the protrusion of the housing 78. As a result, the rotation of the handle 73 is restricted.

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

When the operation of the air purifier 1 having the above configuration 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 portion 21 is attached to the main body portion 20, the blower 10 and the ion generator 11 are driven. As a result, the air in the living room is sucked from the suction port 3 and circulates through the air passage 8. At this time, the pre-filter 6 collects large dust in the air. Further, the 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.

Then, the ions generated by the ion generator 11 are included in the air. Air containing ions is blown into the living room from one or both of the outlets 4 and 5. As a result, the air purifier 1 is blown, 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 operating time of the air purifier 1 within a predetermined period exceeds a predetermined time. The blower 10 is stopped when the cleaning device 30 is driven.

When the cleaning device 30 is driven, the drive motor 100 rotates, and the bevel gear 61 (see FIGS. 6 and 7) rotates counterclockwise when viewed from the front. The bevel gear 62 and the spur gear 63 rotate clockwise when viewed from the right side (viewed from the direction of arrow A). As a result, the take-up roll 50 rotates clockwise when viewed from the right side, and the pre-filter 6 is pulled out from the supply roll 40 and taken up.

The spur gear 64, the internal gear 65, the spur gear 66 and the spur gear 67 rotate counterclockwise when viewed from the right side surface, and the spur gear 68 rotates clockwise when viewed from the right side surface. As a result, the brush body 80 rotates clockwise when viewed from the right side surface. At this time, the brush bristles 82 of the brush body 80 slide on the pre-filter 6 on the take-up roll 50. As a result, the dust on the pre-filter 6 is removed, and the dust is collected in the dust collecting container 92.

At this time, the rotation direction of the take-up roll 50 and the rotation direction of the brush body 80 are the same. Therefore, the brush bristles 82 of the brush body 80 slide on the pre-filter 6 from the direction opposite to the traveling direction of the pre-filter 6. Therefore, the brush body 80 can surely remove the 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 take-up roll 50. As a result, the contact length of the brush bristles 82 in the circumferential direction on the pre-filter 6 can be made longer than the contact cycle of the brush bristles 82, and the brush bristles 82 can be brought into contact with the pre-filter 6 without gaps. ..

The brush bristles 82 on the rotating shaft 81 are combed by the comb portion 93, and the dust adhering to the brush bristles 82 falls into the dust collecting container 92.

When the pre-filter 6 is wound around the take-up roll 50, the rotating body 71 (see FIG. 8) of the urging portion 70 connected to the supply roll 40 is clockwise when viewed from the right side (viewed from the direction of arrow A). Rotate to. As a result, the royal fern 75 is wound, and the urging force of the royal fern 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. As a result, the user can easily recognize that the cleaning device 30 is being driven. Therefore, it is possible to prevent the user from misidentifying 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. As a result, the bevel gear 61 rotates in the direction opposite to that at the time of winding (clockwise in the present embodiment). At this time, the take-up roll 50 and the brush body 80 rotate counterclockwise when viewed from the right side surface.

When the winding of the pre-filter 6 by the winding roll 50 is completed, the urging force of the royal fern 75 is larger than that before winding. Therefore, when the drive motor 100 is reversed, the rotating body 71 rotates counterclockwise when viewed from the right side surface due to the restoring force of the royal fern 75. As a result, the pre-filter 6 is rewound to 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. As a result, the cleaning operation by the cleaning device 30 is completed.

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

If the supply roll 40 does not reach a predetermined rotation amount within a predetermined time even if the drive motor 100 is driven, a character or the like indicating an error is displayed on the display unit 17 to notify the error.

If the supply roll 40 falls off or the bar material 6a of the pre-filter 6 is detached from the shaft 41 and the shaft 51, the supply roll 40 does not rotate even if the take-up roll 50 rotates. Further, when the rotational load of the supply roll 40 increases due to the dust accumulated on the pre-filter 6, the pre-filter 6 is not normally rewound to 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 notifies the error. As a result, the user can easily recognize that the pre-filter 6 has not been cleaned by the cleaning device 30. 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 dispose of the dust collected in the dust collecting container 92.

Further, 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 portion 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 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. do. As a result, the pre-filter 6 is wound around 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 pre-filter 6.

According to this embodiment, the drive motor 100 is driven and 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 take-up 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 detecting unit 110 has a light emitting unit 111a and a light receiving unit 111b arranged on the main body 20, and also receives light transmission state and shading between the light emitting unit 111a and the light receiving unit 111b 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-transmitting state due to the displacement of the lever member 113 sliding on the cam surface 112a formed on the peripheral surface of the cam 112 integrated with the shaft 41. As a result, the rotating cam 112 can be formed to have a small diameter, and the lever member 113 can be arranged in only one direction in the 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 made of a thin member that is slantably supported inside the main body portion 20, and a slit 20b through which the lever member 113 is inserted is provided in the main body portion 20. As a result, the supply roll 40 and the main body 20 can be placed close to each other, and the air purifier 1 can be miniaturized. In addition, it is possible to prevent contact between the electrical components in the main body 20 and the fingers, and improve the safety of the air purifier 1.

Further, the take-up roll 50 is rotationally driven to notify an error when the supply roll 40 does not reach a predetermined rotation amount within a predetermined time. As a result, the user can easily recognize that the pre-filter 6 has not been cleaned by the cleaning device 30.

Further, the cleaning device 30 includes an urging unit 70 (first rotation drive unit) for rotating the supply roll 40 and a drive motor 100 (second rotation drive unit) for rotating the take-up roll 50. The body portion 58a (fitting portion) of the cap member 58 is formed so as to be fitted to the support member (first support member) 49 and the support member (second support member) 59. The engagement hole 58c (connecting 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 arranged at both ends of the supply roll 40 and the take-up roll 50 can be made common. Therefore, it is possible to reduce the component cost of the air purifier 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 detecting unit 110 of the second embodiment. For convenience of explanation, the same parts as those in the first embodiment shown in FIGS. 1 to 12 are designated by the same reference numerals. In the present embodiment, the configuration of the rotation amount detecting 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 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 facing the supply roll 40. Further, the window portion 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 arranged on the peripheral surface 114a of the rotating body 114 provided at the axial end of the shaft 41. A plurality of reflecting portions 114b are provided in the circumferential direction at a predetermined cycle. As a result, the reflective portion 114b and the non-reflective portion 114c other than the reflective portion 114b are alternately arranged on the peripheral surface 114a in the circumferential direction.

The photo interrupter 111 is arranged 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 portion 20c.

When the supply roll 40 rotates and the emitted light of the light emitting unit 111a is irradiated to the reflecting unit 114b, it is reflected and incident on the light receiving unit 111b. When the emitted light of the light emitting unit 111a is applied to the non-reflective unit 114c, it is not reflected and therefore does not enter the light receiving unit 111b.

As a result, the rotation amount detection unit 110 can detect the rotation amount of the supply roll 40 by 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 111a and the light receiving portion 111b face the reflecting portion 114b provided on the peripheral surface of the shaft 41 via the window portion 20c that opens to the main body portion 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 placed closer to each other. Therefore, the size of the air purifier 1 can be further reduced.

Further, since the window portion 20c is covered with the transparent member 20d, contact between the electrical components in the main body portion 20 and the fingers can be prevented, and the safety of the air purifier 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 parts as those in the first embodiment shown in FIGS. 1 to 12 are designated 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 those in the first embodiment.

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

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

1 Air purifier 2 Housing 3 Suction port 4, 5 Air outlet 6 Pre-filter (filter)
6a Bar material 6b Ventilation part 6c Storage part 6g Design 7 Deodorizing filter 8 Air passage 8a 1st branch passage 8b 2nd branch passage 9 Dust collector filter 10 Blower 11 Ion generator 12 Damper 14, 15 Wind direction plate 17 Display 20 Main body 20a Back surface 20b Slit 20c Window part 20d Transparent member 21 Cover part 22 Pressing member 23 Magnet 30 Cleaning device 40 Supply roll 41 Shaft (first shaft)
49 supporting member (first support member)
49a Fitting hole 50 Winding roll 51 Shaft (2nd shaft)
58 Cap member 58a Body (fitting part)
58b protruding part 58c engaging hole (connecting part)
58d Engagement part (connecting 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 part (1st rotation drive part)
71 Rotating body 71a Holding part 72 Rotating body 72a Claw 73 Handle 74 Connecting member 75 Zenmai 76 Compression spring 77 Stopper 77a Torsion coil spring 78, 79 Housing 80 Brush body 81 Shaft 82 Brush hair bundle 90 Dust collection part 91 Lid 91a Opening 92 Dust collection container 93 Comb 100 Drive motor (2nd rotation drive)
110 Rotation amount detection unit 111 Photo interrupter 111a Light emitting unit 111b Light receiving unit 112 Cam 112a Cam surface 112b Recessed part 113 Lever member 113a Axis support shaft 113b Projecting piece 114 Rotating body 114a Peripheral surface 114b Reflecting part 114c Non-reflective part 200 Humidifying part 201
202 Humidification filter

Claims (6)

A housing that opens the suction port and the air outlet, an air passage that connects the suction port and the air outlet, a blower arranged in the air passage, and a filter arranged facing the suction port. In an air purifier equipped with a cleaning device for cleaning the filter,
The cleaning device winds the supply roll in which the sheet-shaped filter is wound on the shaft, the take-up roll that winds the filter, the drive motor that rotationally drives the take-up roll, and the supply roll. It has an urging unit that urges the take-up roll in the direction opposite to the winding direction, and a rotation amount detection unit that detects the rotation amount of the supply roll according to the rotation of the supply roll itself. An air purifier characterized in that the drive control of the drive motor is performed based on the detection result of the above. A main body portion that opens the air outlet and a cover portion that opens the suction port and is detachably arranged on the main body portion and holds the supply roll are further provided, and the rotation amount detecting portion is the main body portion. 1. The light emitting unit and the light receiving unit arranged in the light emitting unit are provided, and the light transmitting state and the light blocking state between the light emitting unit and the light receiving unit can be switched according to the rotation of the supply roll. The air purifier described in. A cam surface formed on the peripheral surface of the axial end of the shaft and a lever member that slides on the cam surface and is displaced in the radial direction of the shaft are provided, and the lever member serves as the light emitting portion. The air according to claim 2, wherein the air is arranged between the light receiving portion to form the light blocking state, and is retracted from between the light emitting portion and the light receiving portion to form the light transmitting state. Cleaner. Made of thin-shaped member on which the lever member is tiltably supported within said body portion, according to slit said lever member is inserted into請Motomeko 3 you, characterized in that provided in the body portion Air cleaner. The light emitting portion and the light receiving portion face the axial end portion of the shaft via a window portion opening to the main body portion, and a reflecting portion that reflects the emitted light of the light emitting portion is provided on the peripheral surface of the shaft. The air purifier according to claim 2, wherein the air purifier is characterized in that. The air purification according to any one of claims 1 to 5, wherein the take-up roll is rotationally driven to notify an error when the supply roll does not reach a predetermined rotation amount within a predetermined time. Machine.

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