CN109906344B

CN109906344B - Air purifier

Info

Publication number: CN109906344B
Application number: CN201780053525.3A
Authority: CN
Inventors: 鬼木涉
Original assignee: Sharp Corp
Current assignee: Sharp Corp
Priority date: 2016-10-19
Filing date: 2017-02-27
Publication date: 2020-09-01
Anticipated expiration: 2037-02-27
Also published as: JP6718971B2; RU2704933C1; TW201815455A; TWI636823B; CN109906344A; JPWO2018073989A1; PH12019500465A1; SG11201902012XA; MY195128A; WO2018073989A1

Abstract

An air cleaner that can sufficiently clean a filter is provided. An air cleaner (1) is provided with a casing (2) in which an inlet (3) and outlet (4, 5) are open, an air passage (8) connecting the inlet (3) and outlets (4, 5), a blower (10) disposed in the air passage (8), a pre-filter (6) disposed so as to face the inlet (3), and a cleaning device (30) for cleaning the pre-filter (6), and is provided with: a supply roller (40) around which a sheet-like pre-filter (6) is wound; a winding roller (50) for winding the pre-filter (6); a drive motor (100) for driving the winding roller (50) to rotate; a biasing unit (70) that biases the rotation axis of the supply roller (40) in the opposite direction to the winding direction when the winding roller (50) is wound; a brush body (80) that slides on the prefilter (6) when the take-up roll (50) rotates; and a rotation amount detection unit (110) that detects the amount of rotation of the drive motor (100); the step-out of the drive motor (100) is determined based on the detection result of the rotation amount detection unit (110), and the drive motor (100) is reversed when the step-out is detected.

Description

Air purifier

Technical Field

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

Background

Patent document 1 discloses a conventional air cleaner. The air purifier has a housing with an opening for the suction port and the blow port. An air passage connecting the suction port and the discharge port is provided in the casing, and a blower is disposed in the air passage. A prefilter (filter) is disposed facing the suction port.

In the air cleaner configured as described above, at the start of operation, the blower is driven to suck indoor air from the intake port. The air sucked from the suction port is captured by the pre-filter, and the dust is blown out from the blow-out port. Therefore, indoor air purification can be performed.

In recent years, there has been an increasing demand for an air cleaner provided with a cleaning device for cleaning a prefilter. Patent document 2 discloses a cleaning device for cleaning a filter disposed to face a suction port of a projector. The cleaning device includes a supply roll, a winding roll, a brush, a motor for the supply roll, a motor for the winding roll, a motor for the brush, and a dust box.

A sheet filter is wound around the supply roller. The take-up roll is rotated by driving of a take-up roll motor, and winds up the filter drawn out from the supply roll. The brush body has bristles radially formed on the shaft, and when the winding roller rotates, the brush body is rotated by the driving of the motor, and the bristles wipe the filter to remove dust. The dust box collects dust removed from the filter by the brush body. The supply roller is rotated by a motor for the supply roller, and the filter wound around the winding roller is wound back. Therefore, the dust on the filter is removed and the filter is cleaned.

The cleaning device of patent document 2 has a detection switch. The detection switch is disposed near the winding roller and detects whether the filter wound around the winding roller has a predetermined outer diameter. When the detection switch detects that the filter wound around the winding roller has a predetermined outer diameter, the motor for the supply roller is driven. Therefore, the filter wound around the winding roller is wound back to the supply roller.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open No. 2009-66466 (page 8, page 9, fig. 1) patent document 2: japanese patent No. 5627066 (

pages

6 and 7, FIGS. 1 and 4)

Disclosure of Invention

Technical problem to be solved by the invention

However, according to the cleaning device of patent document 2, since the filter is in a sheet shape, the outer diameter varies with the amount of filter wound around the winding roller. Therefore, the detection switch cannot accurately detect the winding end of the winding roller, and there is a problem that the cleaning of the filter is insufficient.

The invention aims to provide an air purifier capable of fully cleaning a filter.

Technical solution for solving technical problem

In order to achieve the above object, an air cleaner of the present invention includes a housing having an opening at a suction port and an opening at a discharge port, an air passage connecting the suction port and the discharge port, a blower disposed in the air passage, a filter disposed to face the suction port, and a cleaning device for cleaning the filter, the cleaning device including: a supply roller around which the filter is wound in a sheet shape; a winding roller for winding the filter; a driving motor for driving the winding roller to rotate; a biasing portion that biases the rotation shaft of the supply roller in a direction opposite to the winding direction when the winding roller is wound; a brush body sliding on the filter when the winding roller rotates; and a rotation amount detection unit for detecting the rotation amount of the drive motor; the step-out of the drive motor is judged based on the detection result of the rotation amount detection unit, and the drive motor is rotated in reverse when the step-out is detected.

In the air cleaner of the above configuration, it is preferable that the rotation amount detecting unit includes a photo-interrupter and a slit disk that rotates in conjunction with the drive motor; when the rotation amount detecting unit does not detect a pulse output by the rotation of the slit disk for a predetermined time while the winding roll winds the filter, it is determined that the drive motor is out of step.

In the air cleaner having the above configuration, it is preferable that an error is notified when the rotation amount detected by the rotation amount detecting unit is out of a predetermined range when the drive motor is out of synchronization.

In the present invention, it is preferable that the air cleaner configured as described above further includes a detachable sensor for detecting attachment and detachment of the supply roller; when the cleaning device is driven for the first time after the supply roller is detached, the rotation amount of the driving motor when the driving motor rotates reversely is smaller than the rotation amount of the driving motor when the driving motor is out of step.

In the air cleaner of the present invention, it is preferable that the cleaning device resets the rotation amount detected by the rotation amount detecting unit and starts the winding of the filter by the winding roller when the cleaning device is operated again after being stopped during driving; when the rotation amount detected by the rotation amount detection unit at the end of the filter winding by the drive motor is larger than a predetermined rotation amount, the drive motor is rotated reversely to the detected rotation amount, and when the rotation amount is smaller than the predetermined rotation amount,

the drive motor is reversed by the predetermined rotation amount. Advantageous effects

According to the present invention, step-out of the drive motor is determined based on the detection result of the rotation amount detection unit, and the drive motor is reversed when step-out occurs. Therefore, the winding end of the winding roller can be accurately detected. Thus, the filter can be sufficiently cleaned.

Drawings

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

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

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

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

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

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

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

Fig. 8 is a perspective view of a rotation detecting unit of an air cleaner according to a first embodiment of the present invention.

Fig. 9 is an exploded perspective view of a biasing portion of a cleaning device of an air cleaner according to a first embodiment of the present invention.

Fig. 10 is a flowchart showing the operation of the cleaning device of the air cleaner according to the first embodiment of the present invention.

Fig. 11 is a side view of the support member of the cover part of the air cleaner according to the second embodiment of the present invention before the supply roller is mounted.

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

Fig. 13 is a side view of the support member of the cover part of the air cleaner according to the third embodiment of the present invention before the supply roller is mounted.

Fig. 14 is a side view of the support member of the cover part of the air cleaner according to the third embodiment of the present invention after the supply roller is mounted thereto.

Fig. 15 is a plan view of a pre-filter of an air cleaner according to a fourth embodiment of the present invention.

Fig. 16 is a perspective view of a pressing member of an air cleaner according to a fifth embodiment of the present invention.

Detailed Description

(first embodiment)

Embodiments of the present invention will be described below with reference to the drawings. Fig. 1 and 2 are a front view and a side sectional view showing an air cleaner according to a first embodiment. Further, an arrow S indicates the flow of air. The air cleaner 1 has a casing 2 that has an inlet 3 and outlet 4, 5 opened therein and is installed on the floor or the like of the room. The housing 2 includes a main body portion 20 and a lid portion 21. The cover 21 is detachably attached to the back surface of the body 20, and has the suction port 3 opened therein. In the main body 20, the outlets 4 and 5 open to the upper front and upper surfaces, respectively.

Air deflectors

14 and 15 that can change the air direction are provided in the air outlets 4 and 5, respectively. The wind direction plate 14 is formed of a flat plate, and is supported to be rotatable in the vertical direction by a rotation shaft (not shown) provided in the wind direction plate 14. A plurality of vertical louvers 14a are vertically arranged below the louver 14 in the left-right direction. The vertical louvers 14a at both side end portions are inclined outward in the left and right directions toward the front.

The wind direction plate 15 is formed of a flat plate, and is supported to be rotatable 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 arranged below the louver 15 in the left-right direction. The vertical louvers 15a at both side end portions are inclined outward in the left and right direction as they go rearward.

The

wind direction plates

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

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

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

The flap 12 is thin and supported by a pivot shaft 12a so as to be pivotable in the vertical direction. The shutter 12 is rotatable in an opening direction (counterclockwise in fig. 2) from a position (see fig. 2) at which the first branch passage 8a is closed. The baffle plate 12 can change the air volume balance between the first branch passage 8a and the second branch passage 8 b.

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

The prefilter 6 is formed of a sheet-like mesh made of polypropylene or the like, and a cover 21 is disposed facing the suction port 3. Larger dust in the collected suction air can be captured by the pre-filter 6.

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

The dust suction filter 9 is a HEPA filter, and a frame member (not shown) is covered with a filter material (not shown) by hot melt adhesive. The dust collection filter 9 can capture fine dust in the collected air and fine particles such as PM2.5 having a particle diameter smaller than a predetermined particle diameter (for example, 3 μm).

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

The ion generating device 11 has an ion generating surface 11a that generates ions by application of a high voltage, and the ion generating surface 11a faces the air passage 8. A voltage having an ac waveform or a pulse waveform is applied to the ion generating surface 11 a. Ion generationThe voltage applied to the surface 11a is mainly H at positive voltage⁺(H₂O) m, and O is mainly generated when the negative voltage is applied₂ ^-(H₂O) n. Here, m and n are integers. H⁺(H₂O) m and O₂ ^-(H₂O) n is formed by aggregating floating bacteria or ozone components in the air on the surface to surround them.

Then, as shown in the following chemical formulas (1) to (3), [. OH ] as an active agent is formed by aggregation on the surface of a microorganism or the like by collision](hydroxy radical) or H₂O₂(hydrogen peroxide) to destroy floating bacteria and the like. Here, m 'and n' are integers. Therefore, since positive ions and negative ions are generated and sent out from the air outlets 4 and 5, the sterilization and deodorization in the room can be performed.

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

H⁺(H₂O)m+H⁺(H₂O)m'+O₂ ^-(H₂O)n+O₂ ^-(H₂O)n'

→2·OH+O₂+(m+m'+n+n')H₂O…(2)

H⁺(H₂O)m+H⁺(H₂O)m'+O₂ ^-(H₂O)n+O₂ ^-(H₂O)n'

→H₂O₂+O₂+(m+m'+n+n')H₂O…(3)

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

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

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

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

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

Further, a mounting/dismounting sensor (not shown) for detecting mounting/dismounting of the supply roller 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 mounted on the supply roller 40. The hall element is disposed on the back surface of the main body 20 at a position facing the magnet of the supply roller 40.

The winding roller 50 has a shaft 51 extending in the left-right direction, and covers 58 are fitted to both end portions of the shaft 51. Left and right covers 58 are rotatably supported by a support member 59 and a gear unit 60 disposed at the lower end portion of the inner surface of lid 21. Therefore, the winding roller 50 is disposed to be rotatable about a rotation axis extending in the left-right direction.

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

The housing portion 6c is provided with a pattern 6g which is different from the ventilation portion 6b and is visible from the suction port 3. In the present embodiment, as the pattern 6g, a red character "being cleaned" is used. The pattern 6g is not particularly limited, and may be, for example, a line pattern having a color different from that of the vent portion 6 b.

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

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

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

When a force is applied in the expanding direction (the left-right direction in fig. 5) of the opening 41a of the sleeve 41d, the sleeve 41d is elastically deformed. The rod 6a of the pre-filter 6 can be attached to the shaft 41 through the expanded opening 41 e. Similarly, the rod 6a at the lower end of the pre-filter 6 can be attached to and detached from the shaft 51. Therefore, the pre-filter 6 can be easily removed from the cleaning device 30, and the pre-filter 6 can be replaced or the like.

In fig. 3, brush 80 is disposed in dust suction portion 90 detachably attached to lid 21. The brush 80 has a shaft 81 whose both ends in the axial direction are supported by the dust suction unit 90, and rotates to remove dust on the pre-filter 6 when the cleaning device 30 is driven, as will be described later. A spur gear 68 is provided at one end (right end) of a shaft 81, and bristle bundles 82 are implanted spirally at a predetermined interval on the circumferential surface of the shaft 81.

The dust suction unit 90 includes a lid 91, a container 92, and a comb unit 93, and is detachably attached to the lid 21. The container 92 is made of transparent resin, has an open top, and supports the brush body 80 at both side portions. The lid 91 has an opening 91a opened at the left and right ends to cover the upper surface of the container 92. The brush body 80 has the bundle of bristles 82 exposed to the outside through the opening 91 a. The comb 93 extends in the right-left direction, and the comb teeth are arranged in the container 92 facing upward. The bristle bundles 82 of the rotating brush body 80 abut on the comb teeth of the comb portion 93. The dust attached to the bristle bundles 82 is removed from the bristle bundles 82 by the comb part 93.

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

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

The pressing member 22 is disposed with a predetermined gap in front of the pre-filter 6. The pressing member 22 is detachably attached to the lid portion 21. The pressing member 22 has a rectangular frame 22a formed of synthetic resin such as ABS. The frame 22a is provided with a rib 22b extending in the vertical direction and a plurality of (three in the present embodiment) ribs 22c extending in the horizontal direction and arranged in parallel in the vertical direction. Therefore, the pressing member 22 has a plurality of stages and rows of windows. By stably disposing the pre-filter 6 along the suction port 3 by the pressing member 22, the pre-filter 6 can be prevented from being loosened by the suction airflow.

A magnet 23 is provided at the center of the right end of the frame 22a of the pressing member 22. A hall element (not shown) is provided at a position of the main body portion 20 facing the magnet 23. The air cleaner 1 can judge whether the cover part 21 is mounted on the main body part 20 through the hall element. Further, the air cleaner 1 prohibits the operation of the blower 10 when it is determined that the cover 21 is not attached to the main body 20. Therefore, the air blowing operation of the air cleaner 1 in a state where the cover 21 is not attached to the main body portion 20 can be avoided. When the lid 21 is removed from the main body 20 during driving of the cleaning device 30, driving of the cleaning device 30 is stopped.

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

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

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

The bevel gear 61 is disposed in the front-rear direction in the axial direction, and has a fitting hole 61a fitted to a rotating shaft (not shown) of the drive motor 100 (see fig. 2) on the shaft. The bevel gear 62 is arranged in the left-right direction in the axial direction and engages with the bevel gear 61. The flat gear 63 is coaxially formed integrally with the bevel gear 62.

The shaft portion 63a of the spur gear 63 has a fitting hole (not shown) into which the convex portion 58a (see fig. 3) of the cover 58 is fitted. Therefore, the flat gear 63 and the bevel gear 62 are coupled to the winding roller 50.

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

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

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

The bevel gears 61 and 62 may be cross-shaft gears. Further, as the flat gears, helical gears or the like may be used as long as they are parallel-axis gears.

In addition, the main body 20 of the air cleaner 1 is provided with a rotation amount detection unit 110. Fig. 8 is a perspective view of the rotation amount detection unit 110 when viewed from the rear surface side of the air cleaner 1. The rotation amount detection unit 110 includes a photo interrupter 111 and a slit disk 112.

The photo-interrupter 111 includes a light emitting portion 111a that emits light, and a light receiving portion 111b that receives the light emitted from the light emitting portion 111 a. A plurality of slits 112a are provided in the slit disk 112 at a predetermined cycle in the circumferential direction. The slit disk 112 is provided coaxially with the flat gear 115, and rotates integrally with the flat gear 115. The slit disk 112 is arranged such that the slit 112a passes between the light emitting section 111a and the light receiving section 111b when rotated. The flat gear 115 engages with the flat gear 116, and a rotation shaft of the flat gear 116 is fixed to a rotation shaft of the drive motor 100. The flat gear 116 rotates integrally with the drive motor 100.

When the driving motor 100 rotates, the spur gears 115 and 116 and the slit disk 112 rotate. At this time, the photo interrupter 111 detects conduction shielding of light passing through the slit 112 a. Therefore, the rotation amount detection unit 110 detects the number of pulses (rotation amount) output by the rotation of the slit disk 112. When the photointerrupter 111 does not detect the pulse for a predetermined time (for example, 60 seconds), a control unit (not shown) of the air cleaner 1 determines that the drive motor 100 is out of step.

Fig. 9 is an exploded perspective view of the biasing portion 70 of the cleaning device 30. The biasing portion 70 includes a rotating body 71 (first rotating body) and a rotating body 72 (second rotating body) housed in

housings

78, 79 screwed to each other. The rotating body 71 has a clamping portion 71a protruding from one end surface in the axial direction and a groove portion 71b formed in the other end surface. The locking portion 48a provided in the cover 48 is fitted in the groove portion 71 b. Therefore, the rotating body 71 locks the shaft portion of the supply roller 40, and the supply roller 40 is connected to the biasing portion 70.

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

A plurality of claws 72a are provided at predetermined intervals on the outer peripheral surface of the rotating body 72 on the outer side (right side) in the axial direction. The stopper 77 is pivotally supported in the housing 78, and the stopper 77 is urged in a direction of pressing the rotary body 72 by a helical torsion spring 77 a. Therefore, the rotation body 72 is restricted from rotating clockwise with a smaller biasing force of the spring 75 when viewed from the direction of arrow a by the engagement of the stopper 77 and the pawl 72 a.

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

In the housing 78, the coupling member 74 is disposed on the inner side (left side) in the axial direction of the flange portion 73 a. A compression spring 76 is disposed between the rotating body 72 and the coupling member 74, and the coupling member 74 is urged outward (rightward) in the axial direction. A plurality of notches 74c are formed at predetermined intervals on the circumferential surface of the coupling member 74. A plurality of ribs 72c that are fitted into the notches 74c and extend radially are formed at the outer end of the rotating body 72 in the axial direction. Therefore, the coupling member 74 rotates integrally with the rotating body 72.

The connecting member 74 is formed to have a larger diameter than the flange portion 73a and the opening portion 78 a. A plurality of inclined portions 74a and a plurality of ribs 74b are provided at predetermined intervals on the axially outer (right) surface of the coupling member 74. The inclined portion 74a is formed to gradually become higher counterclockwise as viewed from the arrow a direction. 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 ribs 73b that engage with the ribs 74b and extend radially are provided on the axially inner surface (left side surface) of the flange 73 a. 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 as viewed from the arrow a direction, the rib 74b engages with the rib 73b and with the projection of the housing 78. Thus, the rotation of the handle 73 is restricted.

On the other hand, when the handle 73 is rotated counterclockwise as viewed from the arrow a direction, the rib 73b slides on the inclined surface 74 a. Therefore, the coupling member 74 moves axially inward against the biasing force of the compression spring 76, and the rib 74b is axially spaced from the projection of the housing 78. Therefore, 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 biasing force of the spring increases. That is, the rotating body 72 is operated to rotate 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 lid 21 is attached to the main body unit 20. When the determination lid 21 is attached to the main body 20, the blower 10 and the ion generating device 11 are driven. Therefore, the air sucked into the room from the suction port 3 flows through the air flow path 8. At this time, the large dust in the collected air is captured by the pre-filter 6. The air is deodorized by the deodorizing filter 7, and fine dust, PM2.5, and other fine particles in the collected air are captured by the dust collecting filter 9.

Next, the ions generated by the ion generator 11 are included in the air. The air containing ions is blown out into the room from one or both of the air outlets 4 and 5. Therefore, the air blower 1 performs the air blowing operation to purify the air in the room.

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

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

In step #13, the drive motor 100 rotates, and the bevel gear 61 (see fig. 6 and 7) rotates counterclockwise when viewed from the front. The bevel gear 62 and the flat gear 63 rotate clockwise when viewed from the right side (when viewed from the direction of arrow a). Therefore, the winding roller 50 rotates clockwise when viewed from the right side, and pulls out and winds the pre-filter 6 from the supply roller 40.

The spur gear 64, the internal gear 65, the spur gear 66, and the spur gear 67 rotate counterclockwise when viewed from the right side, and the spur gear 68 rotates clockwise when viewed from the right side. Therefore, the brush body 80 rotates clockwise when viewed from the right side. At this time, the bundle of bristles 82 of the brush body 80 slides on the pre-filter 6 on the winding roller 50. Therefore, 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 roller 50 is the same as the rotation direction of the brush body 80. Therefore, the bundle of bristles 82 of the brush body 80 slides on the pre-filter 6 from the direction opposite to the traveling direction of the pre-filter 6. Therefore, the brush body 80 reliably removes dust on the pre-filter 6.

Further, it is preferable that the rotation speed of the brush body 80 is greater than that of the winding roller 50. Therefore, the contact length of the bristle bundles 82 in the circumferential direction on the pre-filter 6 is longer than the contact length of the bristle bundles 82, and the bristle bundles 82 can be contacted with each other on the pre-filter 6 without any gap.

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

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

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

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

In step #14, it is determined whether or not the cleaning device 30 is stopped during driving. For example, when the power of the air cleaner 1 is turned off, the power is off, and the lid 21 is removed from the main body 20 by the operation of the operation unit 19, the cleaning device 30 is stopped during driving. When the cleaning device 30 is stopped due to the power-off or the attachment/detachment of the lid 21, an error notification is performed in step #31, and the process proceeds to step # 26. If cleaning device 30 is not stopped, the process proceeds to step # 15.

In step #15, it is determined whether the drive motor 100 is out of step. When the drive motor 100 is out of step, the process proceeds to step #16, and when it is not out of step, the process returns to step #14, and step #14 and step #15 are repeated. At this time, the rotation amount detection unit 110 counts the number of the slits 112a and detects the rotation amount N1 of the drive motor 100.

In step #16, it is judged whether or not the variable Y is 1. When the variable Y is 1, the operation of the cleaning device 30 in the previous operation is resumed after the stop during driving, and the process proceeds to step # 19. When the cleaning device 30 is stopped during driving and then starts operating, the amount of rotation detected by the rotation amount detecting unit 110 is reset, and the winding of the prefilter 6 by the winding roller 50 is started. When the variable Y is 0, it indicates that the cleaning device 30 in the previous operation has ended normally, and the process proceeds to step # 17.

In step #17, it is determined whether or not the rotation amount N1 detected by the rotation amount detection unit 110 when the drive motor 100 is out of step is within a predetermined range (for example, 66 times < N1 times <96 times). When the rotation amount N1 is within the predetermined range, the process proceeds to step #18, and when it is out of the predetermined range, the process proceeds to step # 31. When the rotation amount N1 is within the predetermined range, the winding of the prefilter 6 by the winding roller 50 is completed when the drive motor 100 is out of step.

When the rotation amount N1 is smaller than the lower limit value (66 times) of the predetermined range, the winding of the prefilter 6 by the winding roller 50 may be stopped in the middle, for example. When the rotation amount N1 is greater than the upper limit value (96 times) of the predetermined range, the winding of the prefilter 6 by the winding roller 50 may be incomplete.

In step #31, characters indicating an error are displayed on the display unit 17. Therefore, the user can easily recognize that the cleaning of the prefilter 6 by the cleaning device 30 is not completed by performing the error notification. The user performs a predetermined process in response to the error notification. After step #31, the process moves to step # 26.

In step #18, it is determined whether or not the first cleaning operation is performed after the supply roller 40 is attached to and detached from the cover 21. The process proceeds to step #22 in the first cleaning operation, and proceeds to step #21 in the case where the cleaning operation is not the first cleaning operation. In step #21, the rotation amount N2 required to drive the motor 100 for the pre-filter 6 to wind back the supply roller 40 is set to the rotation amount N1. In step #22, rotation amount N2 is set to be a rotation amount (N1- α, e.g., 79 times) that is smaller than rotation amount N1 by a predetermined amount α.

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

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

In step #23, the drive motor 100 is reversed. Therefore, the bevel gear 61 rotates in the opposite direction (clockwise direction in the present embodiment) to the winding time. At this time, the winding roller 50 and the brush 80 rotate counterclockwise when viewed from the right side.

When the winding of the prefilter 6 by the winding roller 50 is completed, the biasing force of the spiral spring 75 is larger than that before the winding. Therefore, when the drive motor 100 is reversely rotated, the rotator 71 is rotated counterclockwise as viewed from the right side by the restoring force of the spring 75. Thus, the pre-filter 6 is wound back toward the supply roller 40.

In step #24, the rotation amount detected by the rotation amount detection unit 110 waits until the rotation amount reaches the rotation amount N2. In

step #

25, 0 is substituted in the flag F. In step #26, the rotation of the drive motor 100 is stopped. Based on the above description, the cleaning operation by the cleaning device 30 is ended.

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

In addition, when the pre-filter 6 is replaced, the supply roller 40 to which one end of the pre-filter 6 is attached to the cover 21. Further, the lower end of the pre-filter 6 is mounted on the take-up roll 50.

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

rotary bodies

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

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

The rotation amount detector 100 includes a photo interrupter 111 and a slit disk 112 that rotates in conjunction with the drive motor 100. When the pre-filter 6 (filter) is wound by the winding roller 50, the rotation amount detection unit 110 does not detect the pulse output by the rotation of the slit disk 112 for a predetermined time, and determines that the drive motor 100 is out of step. Therefore, the determination of step-out of the drive motor 100 can be easily achieved.

When the rotation amount detected by the rotation amount detection unit 110 when the drive motor 100 is out of step is out of the predetermined range, an error is notified. Therefore, the user can easily recognize that cleaning of the pre-filter 6 by the cleaning device 30 is not completed.

Further, when the first cleaning device 30 is driven after the supply roller 40 is attached and detached, the amount of rotation when the drive motor 100 is reversed is smaller than the amount of rotation of the drive motor 100 when the drive motor 100 is out of step. Therefore, the slack of the pre-filter 6 after the cleaning operation of the cleaning device 30 can be reduced, and the air containing dust can reliably pass through the pre-filter 6.

When the cleaning device 30 is operated again after being stopped during driving, the rotation amount detected by the rotation amount detecting unit 110 is reset, and the winding of the prefilter 6 by the winding roller 50 is started. Next, when the rotation amount N1 detected by the rotation amount detection unit 110 at the time of completion of winding of the pre-filter 6 by the drive motor 100 is larger than the predetermined upper limit rotation amount Nh, the drive motor 100 is reversed by the detected rotation amount N1, and when the rotation amount is smaller than the upper limit rotation amount Nh, the drive motor 100 is reversed by the upper limit rotation amount Nh. Therefore, even when the cleaning operation is completed after the start of the driving of the cleaning device 30, the pre-filter 6 can be reliably wound back around the supply roller 40.

The brush 80 is linked to a drive motor 100 that drives the winding roller 50 to rotate, and rotates when the winding roller 50 rotates, and the prefilter 6 (filter) on the winding roller 50 slides. Therefore, it is not necessary to separately provide a brush body motor of the conventional example for rotating the brush body 80, which is different from the drive motor 100. Therefore, the manufacturing cost of the air cleaner 1 can be reduced.

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

Further, it is preferable that the rotation speed of the brush body 80 is greater than that of the winding roller 50. Therefore, the contact length of the bristle bundles 82 in the circumferential direction on the pre-filter 6 is longer than the contact length of the bristle bundles 82, and the bristle bundles 82 can be contacted with each other on the pre-filter 6 without any gap. Therefore, the dust of the pre-filter 6 is more reliably removed.

The drive motor 100 is disposed in the main body portion 20 of the casing 2, and the supply roller 40 and the take-up roller 50 are disposed in the lid portion 21. Therefore, the lid portion 21 can be easily removed from the main body portion 20 to replace the prefilter 6. Further, although the air cleaner 1 is provided with the cleaning device 30, the pre-filter 6 may be clogged depending on the place where the air cleaner 1 is installed (for example, a place where oil stains are present in a kitchen or the like). In this case, the pre-filter 6 can be easily removed and cleaned.

Further, the winding device includes a bevel gear 61 (first cross shaft gear) having a fitting hole 61a fitted to the rotating shaft of the drive motor 100, a bevel gear 62 (second cross shaft gear) engaged with the bevel gear 61, a flat gear 63 (first parallel shaft gear) rotated integrally with the bevel gear 62 and connected to the winding roller 50, and a flat gear 64 (second parallel shaft gear) engaged with the flat gear 63 and connected to the brush body 80. Therefore, the winding roller 50 and the brush body 80 can be easily rotated by one driving motor 100.

Further, since the flat gear 63 coupled to the winding roller 50 is disposed on the drive motor 100 side than the flat gear 64 coupled to the brush body 80, the attenuation of the driving force transmitted to the winding roller 50 can be suppressed. Therefore, the winding roller 50 biased by the biasing portion 70 of the prefilter 6 resists the biasing force, and the drive motor 100 can be driven to rotate more reliably.

Further, an internal gear 65 provided integrally with the flat gear 64 and a flat gear 66 (third parallel shaft gear) meshing with the internal gear 65 are provided between the brush 80 and the flat gear 64, and the rotation shaft of the brush 80 is disposed between the rotation shaft of the flat gear 63 and the rotation shaft of the flat gear 64. Therefore, the brush 80 that slides on the pre-filter 6 on the winding roller 50 can be easily disposed close to the winding roller 50.

The pre-filter 6 has a ventilation portion 6b disposed to face the suction port 3 when the cleaning device 30 is stopped, and a housing portion 6c fed out from the supply roller 40 when the cleaning device 30 is driven. The housing 6c is provided with a pattern 6g which is different from the ventilation portion 6b and is visible from the suction port 3. Therefore, the movement of the pre-filter 6 can be easily seen, and the user can easily recognize the cleaning of the pre-filter 6 by the cleaning device 30.

When cleaning device 30 is driven, blower 10 is stopped. Therefore, the dust removed from the pre-filter 6 can be prevented from being sucked immediately to the downstream side of the pre-filter 6. Further, the pattern 6g prevents the user from mistakenly recognizing that the blower 10 is stopped due to a failure.

The biasing portion 70 of the cleaning device 30 includes a spring 75 that biases the rotation shaft of the supply roller 40 in the direction opposite to the winding direction when the winding roller 50 winds the pre-filter 6. Therefore, when the drive motor 100 is rotated after the winding of the winding roller 50 is completed, the prefilter 6 is wound back to the supply roller 40 by the restoring force of the spiral spring 75. Therefore, it is not necessary to separately provide a motor for rotating the supply roller 40 in the direction opposite to the winding direction W of the winding roller 50, which is different from the driving motor 100. As a result, the manufacturing cost of the air cleaner 1 can be further reduced. Further, since the wind spring 75 is used, the prefilter 6 can be wound around the winding roller 50 over a long distance while being biased. Therefore, the degree of freedom in designing the size of the pre-filter 6 can be improved.

The biasing portion 70 includes a rotating body 71 (first rotating body) attached to one end of the spring 75 and locked to the shaft of the supply roller 40, a rotating body 72 (second rotating body) attached to the other end of the spring 75 and configured to restrict rotation of the spring 75 in a direction in which the biasing force is reduced, and a knob 73 configured to operate the rotating body 72 to rotate. Therefore, when the supply roller 40 is attached to the lid portion 21 and the handle is operated, the prefilter 6 is wound back in the direction opposite to the winding direction W. Therefore, the slack of the pre-filter 6 can be reduced, and the air containing dust reliably passes through the pre-filter 6.

The biasing unit 70 includes a coupling member 74 that is disposed between the handle 73 and the rotating body 72 and restricts the rotation of the handle 73 in a direction in which the biasing force of the spring 75 decreases, and the coupling member 74 and the rotating body 72 rotate integrally. Therefore, the rotation of the rotating body 72 in the direction in which the biasing force of the spring 75 is reduced is reliably prevented.

Further, the shaft 41 of the supply roller 40 has: a core 41a having a groove 41b, and a sleeve 41d made of an elastic body having a C-shaped cross section and fitted around the core 41a, and the rod 6a of the prefilter 6 is elastically sandwiched by the sleeve 41d and the groove 41 b. Therefore, when the opening 41e of the sleeve 41d is expanded, the rod material 6a can be easily removed from the shaft 41. Further, the sleeve 41d prevents the rod material 6a from falling off the shaft 41. The same applies to the winding roller 50.

The core 41a of the supply roller 40 is made of metal, and the sleeve 41d is made of a resin molded product. The same applies to the winding roller 50. Therefore, the bar material 6a can be easily attached to the

shafts

41 and 51 while sufficiently securing the strength of the

shafts

41 and 51.

(second embodiment)

Next, a second embodiment of the present invention will be described. Fig. 11 is a side view of a support member of the cover portion of the air cleaner according to the present embodiment. For convenience of explanation, the same reference numerals are given to the same parts as those of the first embodiment shown in fig. 1 to 10. The present embodiment is different from the first embodiment in the structure of the support member 49 of the lid 21. The other portions are the same as those of the first embodiment.

A resin rotating plate 400 that rotates in the vertical direction is provided at the front end of the right support member 49 (see fig. 3) of the supply roller 40 of the cover 21. The shaft portion 401 of the rotating plate 400 is disposed behind the center of the rotating plate 400 in the front-rear direction. Therefore, as shown in fig. 11, when the supply roller 40 is not attached to the support member 49, the front end portion of the rotating plate 400 protrudes forward from the support member 49. Therefore, when it is desired to attach the cover portion 21 to the main body portion 20 in a state where the supply roller 40 is not attached to the cover portion 21, the front end portion of the rotating plate 400 interferes with the main body portion 20. Therefore, the supply roller 40 can be easily prevented from being forgotten to be mounted on the cover 21.

On the other hand, as shown in fig. 12, when the supply roller 40 is attached to the support member 49, the supply roller 40 collides against the rear end portion of the rotating plate 400, and the rotating plate 400 rotates upward. Therefore, the front end of the rotating plate 400 is kept away from the rear, and interference between the rotating plate 400 and the main body 20 when the lid 21 is attached to the main body 20 can be prevented.

In addition, in the present embodiment, the same effects as those in the first embodiment can also be obtained.

(third embodiment)

Next, a third embodiment of the present invention will be described. Fig. 13 is a side view of a support member of the cover portion of the air cleaner according to the present embodiment. For convenience of explanation, the same reference numerals are given to the same parts as those of the first embodiment shown in fig. 1 to 10. The present embodiment is different from the first embodiment in the structure of the support member 49 of the lid 21. The other portions are the same as those of the first embodiment.

The support member 49 has a fixed portion 49a and a moving portion 49 b. A spring 49c is provided at the rear end of the moving portion 49b, and one end of the spring 49c is attached to the front surface of the cover portion 21. At this time, the tip end portion of the moving portion 49b is configured to protrude forward from the fixed portion 49a in a state where the spring 49c is extended. Therefore, as shown in fig. 13, when the supply roller 40 is not attached to the support member 49, the tip end portion of the moving portion 49b protrudes forward from the fixed portion 49 a. Therefore, when the cover 21 is attached to the main body 20 in a state where the supply roller 40 is not attached to the cover 21, the tip end of the moving portion 49b interferes with the main body 20. Therefore, the supply roller 40 can be easily prevented from being forgotten to be mounted on the cover 21.

On the other hand, as shown in fig. 14, when the supply roller 40 is attached to the support member 49, the supply roller 40 abutting on the fixed portion 49a moves the moving portion 49b rearward. Therefore, the tip end of the moving portion 49b is kept away from the rear, and interference between the moving portion 49b and the main body 20 when the lid 21 is attached to the main body 20 can be prevented.

In the present embodiment, the same effects as those of the first embodiment can be obtained.

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

(fourth embodiment)

Next, a fourth embodiment of the present invention will be described. Fig. 15 is a plan view of a pre-filter of the air cleaner according to the present embodiment. For convenience of explanation, the same reference numerals are given to the same parts as those of the first embodiment shown in fig. 1 to 10. In the present embodiment, the configuration of the pre-filter 6 is different from that of the first embodiment. The other portions are the same as those of the first embodiment.

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

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

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

When the concentration of the odor component in the air is determined to be high based on the detection result of the odor sensor, the drive motor 100 is driven to rotate the take-up roller 50, and the third area A3 or the fourth area a4 is disposed to face the suction port 3.

According to the above description, since the area of the pre-filter 6 suitable for the air condition in the room is disposed facing the suction port 3, the usability of the air cleaner 1 can be improved.

In the present embodiment, the same effects as those of the first embodiment can be obtained. The prefilter 6 is formed so as to be lined up in the winding direction W to form first to fourth regions a1 to a 4. Therefore, since the area of the pre-filter 6 suitable for the air condition in the room is disposed facing the suction port 3, the usability of the air cleaner 1 can be improved.

The user may select the first to fourth regions a1 to a4 by operating the operation unit 19.

(fifth embodiment)

Next, a fifth embodiment of the present invention will be described. Fig. 16 is a perspective view of a pressing member of a pre-filter of the air cleaner according to the present embodiment. For convenience of explanation, the same reference numerals are given to the same parts as those of the first embodiment shown in fig. 1 to 10. In the present embodiment, the pressing member 22 is different from the first embodiment. The other portions are the same as those of the first embodiment.

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

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

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

The present invention is applicable to an air cleaner provided with a cleaning device for cleaning a filter.

Description of the reference numerals

1, an air purifier; 2, a shell; 3, a suction inlet; 4. 5 an air outlet; 6 prefilter (filter); 6a, a bar material; 6b a ventilation part; 6c a storage section; 6g of pattern; 7a deodorizing filter; 8 an air passage; 8a first branch path; 8b a second branch path; 9 dust absorption filter; 10 blower; 11 an ion generating device; 12, a baffle plate; 14. 15 wind direction plates; 17 a display unit; 20 a main body portion; 21 a cover part; 22a pressing member; 23 a magnet; 30 a cleaning device; 40 a supply roller; 41 shafts; 41a core material; 41d a sleeve; 50 a wind-up roll; 60a gear unit; 61 bevel gear (first cross-shaft gear); 62 bevel gear (second cross-shaft gear); 63 flat gears (first parallel axis gears); 64 flat gears (second parallel axis gears); 65 internal gear; 66 flat gears (third parallel axis gears); 70 force application part; 71a rotating body (first rotating body); 71a holding part; 72a rotating body (second rotating body); 72a, a claw; 73a handle; 74a connecting member; 75 clockwork spring; 76 compression spring; 77a stop member; 77a helical torsion spring; 78. 79 housing; 80 a brush body; an 81-axis; 82 bristle bundles; 90 a dust suction part; 91a cover part; 91a opening part; 92 a container; 93 a comb part; 100 driving motor; 110 a rotation amount detecting section; 111a photo-interrupter; 112 slit circular plate; 200 a humidifying part; 201 a tray; 202 a humidifying filter; 300 a band-shaped member; 400 rotating the plate; 401 a shaft portion; SP space

Claims

1. An air purifier, comprising: a casing having an opening with a suction port and a blow-out port; an air passage connecting the suction port and the discharge port; a blower disposed in the air passage; a filter disposed facing the suction port; cleaning device, it cleans this filter, its characterized in that:

the cleaning device includes:

a supply roller around which the filter is wound in a sheet shape;

a winding roller for winding the filter;

a driving motor for driving the winding roller to rotate;

a biasing portion that biases the rotation shaft of the supply roller in a direction opposite to the winding direction when the winding roller is wound;

a brush body sliding on the filter when the winding roller rotates; and

a rotation amount detection unit for detecting the rotation amount of the drive motor;

the step-out of the drive motor is judged based on the detection result of the rotation amount detection unit, and the drive motor is rotated in reverse when the step-out is detected.

2. The air cleaner of claim 1, wherein the rotation amount detecting portion has a photo-interrupter and a slit disk rotated in conjunction with the driving motor;

when the rotation amount detecting unit does not detect a pulse output by the rotation of the slit disk for a predetermined time while the winding roll winds the filter, it is determined that the drive motor is out of step.

3. The air cleaner according to claim 1 or 2, wherein an error notification is made when the rotation amount detected by the rotation amount detection section when the drive motor is out of step is outside a predetermined range.

4. The air cleaner of claim 1 or 2, wherein the air cleaner is provided with a detachable sensor for detecting the detachment of the supply roller;

when the cleaning device is driven for the first time after the supply roller is detached, the rotation amount of the driving motor when the driving motor rotates reversely is smaller than the rotation amount of the driving motor when the driving motor is out of step.

5. The air cleaner according to claim 1 or 2, wherein when the cleaning device is operated again after being stopped in driving, the amount of rotation detected by the amount-of-rotation detecting section is reset to start the winding of the filter by the winding roller;

when the rotation amount detected by the rotation amount detection unit at the end of the filter winding by the drive motor is larger than a predetermined rotation amount, the drive motor is caused to rotate in reverse by the detected rotation amount, and when the rotation amount is smaller than the predetermined rotation amount, the drive motor is caused to rotate in reverse by the predetermined rotation amount.