WO2023189528A1

WO2023189528A1 - Air purifier

Info

Publication number: WO2023189528A1
Application number: PCT/JP2023/009801
Authority: WO
Inventors: 昌昭古川; 竜太飯島; 経右大森; 祐司所; 真裕野田
Original assignee: ブラザー工業株式会社
Priority date: 2022-03-30
Filing date: 2023-03-14
Publication date: 2023-10-05
Also published as: JP2023148908A

Abstract

Provided is an air purifier for which increase in the number of components can be suppressed.　A rear face 24 of a housing 2 is provided with a suction port 53 and a sensor suction port 14. A right face 26 is provided with a discharge port 56 and a sensor discharge port 15. A dust sensor channel section is provided on the bottom inside the housing 2. The dust sensor channel section is provided between the sensor suction port 14 and the sensor discharge port 15. The dust sensor channel section supports a dust sensor. In the right face 26, the discharge port 56 and the sensor discharge port 15 open to the same side of the housing 2, which is the right side, and as a result thereof, pressure in the vicinity of the sensor discharge port 15 is negative due to an air flow discharged from the discharge port 56. Due to the foregoing, an air flow is generated in the dust sensor channel section, from the sensor suction port 14 toward the sensor discharge port 15.

Description

Air cleaner

The present invention relates to an air cleaner.

The air cleaner disclosed in Patent Document 1 includes a dust sensor. The dust sensor includes a heater as a heat source. Air convection generated by this heater generates an air flow in the internal space of the dust sensor.

JP2016-23867A

If the air cleaner is equipped with a heater or a small fan separate from the air purifying fan in order to draw air into the dust sensor, the number of parts may increase and the configuration may become complicated.

An object of the present invention is to provide an air cleaner that can suppress an increase in the number of parts.

An air cleaner according to one aspect of the present invention includes a housing including a blowout surface, a first suction port that opens in the housing and sucks air, and a first suction port that is provided inside the housing and sucks air from the first suction port. a first flow path through which the air flows, a first outlet opening to the blowout surface and blowing out the air that has flowed through the first flow path; a filter that cleans the air flowing through the channel; a first blower that is installed in the first flow channel and generates a flow of air from the first suction port toward the first outlet; a second suction port that is open and sucks air; a second flow path that is provided in the casing and through which the air sucked from the second suction port flows; and a second flow path that is open to the blowout surface. a second air outlet that blows out the air that has flowed through the air, and a dust sensor that is installed in the second flow path and detects dust in the air that flows through the second flow path, the first air outlet and the The second air outlet is characterized in that it opens on the same side of the housing.

According to the above aspect, since the first air outlet and the second air outlet open on the same side of the housing, the flow of air blown out from the first air outlet creates negative pressure in the vicinity of the second air outlet. . As a result, air flows from the first suction port toward the second blowout port also in the second flow path, so that air can be stably supplied to the dust sensor. This eliminates the need to separately install a heater or fan, so it is possible to suppress an increase in the number of parts and also to suppress an increase in power consumption.

FIG. 2 is a perspective view of the air cleaner 1 as seen diagonally from the front left. FIG. 2 is a perspective view of the air cleaner 1 viewed diagonally from the rear right. 1 is a plan view of an air cleaner 1. FIG. FIG. 2 is a right side view of the air cleaner 1. FIG. FIG. 2 is a perspective view of the air cleaner 1 with the lid removed, seen diagonally from the left front. FIG. 1 is an exploded perspective view of the air cleaner 1. FIG. FIG. 4 is a sectional view taken along the line I--I shown in FIG. 3; 8 is a partially enlarged view of the right side of the air cleaner 1 shown in FIG. 7. FIG. FIG. 2 is a bottom view of the air cleaner 1 with the lower wall omitted. FIG. 3 is a diagram illustrating an analysis of airflow generated within the dust sensor flow path section 100. FIG. 5 is a diagram schematically showing the flow of air blown out from an air outlet 56 on the right side 26 of the housing 2. FIG. It is a figure of the air outlet 45 for sensors (modification example). It is a figure which shows the arrangement|positioning and shape of the air outlet 75 (modification example) for sensors.

An embodiment of the present invention will be described. In the following description, the orientation of the air cleaner 1 will be used as shown in the drawings: up and down, left and right, and front and back.

The air cleaner 1 shown in FIG. 1 includes a housing 2,

blowers

81 and 82,

louvers

71 and 72, a filter 6, and a dust sensor flow path section 100.

The structure of the housing 2 will be explained. As shown in FIGS. 1 and 2, the housing 2 has a rectangular parallelepiped shape, and is longer in the up-down direction than in the front-back direction, and longer in the left-right direction than in the up-down direction. The housing 2 includes a case 3 and a lid 4. The case 3 includes a lower wall 31, an upper wall 32, a front wall 33, a rear wall 34, a left wall 35, and a right wall 36. The lower wall 31, the upper wall 32, the front wall 33, the rear wall 34, the left wall 35, and the right wall 36 form the bottom surface 21, the upper surface 22, the front surface 23, the rear surface 24, the left surface 25, and the right surface 26 of the housing 2. do.

The lower wall 31 and the upper wall 32 extend in the front, rear, left and right directions, and face each other in the up and down direction. The front wall 33 extends from the front end 311 of the lower wall 31 to the front end 321 of the upper wall 32. As shown in FIG. 2, the rear wall 34 extends from the rear end 312 of the lower wall 31 to the rear end 322 of the upper wall 32. The front wall 33 and the rear wall 34 face each other in the front-rear direction.

As shown in FIG. 1, the left wall 35 extends from the left end 313 of the lower wall 31 to a position below the left end 323 of the upper wall 32. The height of the upper end 351 of the left wall 35 is approximately 1/4 of the height from the lower wall 31 to the upper wall 32 in the vertical direction. A recess 355 is provided in the left wall 35. The recess 355 is recessed from the left wall 35 to the right. As shown in FIG. 2, the right wall 36 extends from the right end 314 of the lower wall 31 to a position below the right end 324 of the upper wall 32. The height of the upper end 361 of the right wall 36 is the same as the height of the upper end 351 of the left wall 35. The left wall 35 and the right wall 36 face each other in the left-right direction.

As shown in FIGS. 1 and 5, an opening 325 is formed in the upper wall 32. The opening 325 has a rectangular shape in plan view, and is longer in the left-right direction than in the front-back direction. The opening 325 extends from the front end 321 of the upper wall 32 to the rear end 322 of the upper wall 32, and extends from a position to the right of the left end 323 of the upper wall 32 to a position to the left of the right end 324 of the upper wall 32.

As shown in FIG. 1, the lid 4 is a plate and has a shape corresponding to the shape of the opening 325 in plan view. The lid 4 has a rectangular shape and is longer in the left-right direction than in the front-back direction. The lid 4 is removably attached to the case 3. When the lid 4 is attached to the case 3, the lid 4 closes the opening 325. In this state, the lid 4 forms the top surface 22 together with the top wall 32 . As shown in FIG. 5, when the lid 4 is removed from the case 3, the opening 325 is opened upward. As shown in FIG. 1, a grip portion 41 is provided at the left end 40 of the lid 4. As shown in FIG. The grip part 41 is a snap fit, and maintains the state in which the lid 4 is attached to the case 3 by engaging with the lower side of the upper wall 32.

As shown in FIGS. 1 to 3, a plurality of ribs 29 are provided on each of the top surface 22, front surface 23, and rear surface 24 of the housing 2. The plurality of ribs 29 extend in the left-right direction. A plurality of ribs 29 provided on the upper surface 22 protrude upward and are lined up in the front-rear direction. A plurality of ribs 29 provided on the front surface 23 protrude forward and are arranged in the vertical direction. A plurality of ribs 29 provided on the rear surface 24 protrude rearward and are arranged in the vertical direction.

A suction port 51 is formed on the upper surface 22 of the housing 2. The suction port 51 is formed in the lid 4 and includes a plurality of openings 511 (see FIG. 3). The plurality of openings 511 are arranged in a grid pattern in the front, rear, left and right directions. The plurality of openings 511 penetrate the lid 4 in the vertical direction. Therefore, the opening direction of the suction port 51 is the vertical direction.

As shown in FIG. 1, a suction port 52 is formed on the front surface 23 of the housing 2. The suction port 52 is located between the left end 326 and the right end 327 of the opening 325 in the left-right direction, and is located approximately in the upper 3/4 of the opening 325 in the up-down direction. The suction port 52 is composed of a plurality of openings 521. The plurality of openings 521 are arranged in a grid pattern in the vertical and horizontal directions, and penetrate the front wall 33 in the front-back direction. Therefore, the opening direction of the suction port 52 is the front-rear direction, which is perpendicular to the opening direction (vertical direction) of the suction port 51.

In the area below the suction port 52 on the front surface 23, a power button 8, a light emitting section 5, a light emitting section 7, and a sensor sensing section 16 are provided in order from the right side to the left side. When the user presses the power button 8, the power of the air cleaner 1 is turned on and off. The light emitting unit 5 is, for example, an LED, and notifies filter replacement by lighting up. The light emitting unit 7 is also an LED, for example, and a dust sensor 18 (to be described later) detects dust in the air, and notifies the degree of air contamination by color. The sensor sensing section 16 is a non-contact switch.

As shown in FIG. 2, a suction port 53 is formed on the rear surface 24 of the housing 2. The suction port 53 is located between the left end 326 and the right end 327 of the opening 325 in the left-right direction, and is located approximately in the upper 3/4 portion in the up-down direction. The suction port 53 is composed of a plurality of openings 531. The plurality of openings 531 are arranged in a grid pattern in the vertical and horizontal directions, and penetrate the rear wall 34 in the front-back direction. Therefore, the opening direction of the suction port 53 is the front-back direction, which is parallel to the opening direction of the suction port 52 (front-back direction). That is, the opening direction (front-back direction) of the suction port 53 is orthogonal to the opening direction (vertical direction) of the suction port 51. Air outside the casing 2 is sucked into the casing 2 through

suction ports

51, 52, and 53 by driving blowers 81 and 82 (see FIG. 5), which will be described later.

The sensor suction port 14 is provided in a region below the suction port 53 on the rear surface 24 and on the right surface 26 side of the center in the left-right direction. The sensor suction port 14 includes a partition portion 140, an upper suction port 141, and a lower suction port 142. The partition portion 140 extends in the left-right direction at the center of the sensor suction port 14 in the vertical direction, and partitions the sensor suction port 14 into upper and lower portions. The upper suction port 141 is an opening above the partition part 140, and the lower suction port 142 is an opening below the partition part 140. The upper suction port 141 and the lower suction port 142 are both rectangular openings that are long in the left and right direction when viewed from the front. The sensor suction port 14 sucks air (outside air) around the air cleaner 1 into a dust sensor flow path section 100, which will be described later. The partition section 140 can prevent large foreign objects from entering the dust sensor flow path section 100, which will be described later, and can also prevent the entire inside of the dust sensor flow path section 100 from being seen through the sensor suction port 14. .

The opening area of the sensor suction port 14 is smaller than the opening area of each of the suction ports 51 to 53. Note that "the opening area of the sensor suction port 14" is the sum of the opening area of the upper suction port 141 and the opening area of the lower suction port 142. “Each opening area of the suction ports 51 to 53” refers to the sum of the opening areas of the plurality of openings 511 forming the suction port 51, the sum of the opening areas of the plurality of openings 521 forming the suction port 52, the sum of the opening areas of the plurality of openings 521 forming the suction port 52, is the sum of the aperture areas of the plurality of apertures 531 constituting the .

As shown in FIG. 1, on the left surface 25 of the housing 2, an air outlet 55 is formed in approximately the upper two-thirds of the area in the vertical direction. The air outlet 55 is an opening and has a rectangular shape when viewed from the left side. The air outlet 55 is surrounded by the left end 323 of the upper wall 32, the left end 331 of the front wall 33, the left end 341 of the rear wall 34, and the upper end 351 of the left wall 35. Therefore, the opening direction of the air outlet 55 is the left-right direction, which is perpendicular to the opening direction (up-down direction or front-back direction) of each of the suction ports 51 to 53. The air inside the housing 2 is blown out from the air outlet 55 to the outside (left side) of the housing 2 by driving a blower 81 (see FIG. 6), which will be described later.

As shown in FIGS. 2 and 4, an air outlet 56 is formed in approximately the upper two-thirds of the right surface 26 of the housing 2 in the vertical direction. The air outlet 56 is an opening and has a rectangular shape when viewed from the right side. The air outlet 56 is surrounded by the right end 324 of the upper wall 32, the right end 332 of the front wall 33, the right end 342 of the rear wall 34, and the upper end 361 of the right wall 36. Therefore, the opening direction of the air outlet 56 is in the left-right direction, and is parallel to the opening direction (left-right direction) of the air outlet 55. That is, the opening direction (left-right direction) of the air outlet 56 is perpendicular to the opening direction (vertical direction or front-back direction) of each of the suction ports 51 to 53. The air inside the casing 2 is blown out from the air outlet 56 to the outside (to the right) of the casing 2 by driving a blower 82 (see FIG. 6), which will be described later.

A sensor air outlet 15 is provided in a region below the air outlet 56 on the right side 26 . In the region below the air outlet 56, the sensor air outlet 15 is arranged slightly rearward of the center in the left-right direction and closer to the air outlet 56 side. In the vertical direction, the height of the sensor air outlet 15 from the bottom surface 21 is higher than the height of the sensor suction port 14 provided on the rear surface 24 from the bottom surface 21 . The sensor air outlet 15 includes a blade 150, an upper air outlet 151, and a lower air outlet 152. The blade 150 extends in the front-rear direction at the center of the sensor outlet 15 in the vertical direction, and partitions the sensor outlet 15 into upper and lower sections. The upper air outlet 151 is an opening above the blade 150, and the lower air outlet 152 is an opening below the blade 150. Both the upper air outlet 151 and the lower air outlet 152 are rectangular openings that are long in the left and right direction when viewed from the front. The wing plate 150 extends substantially horizontally toward the right. The sensor air outlet 15 blows out air flowing in the dust sensor flow path section 100 (described later) to the right side of the housing 2.

As shown in FIGS. 6 and 7, the case 3 includes an inner wall 37. The middle wall 37 is located between the lower wall 31 and the upper wall 32 in the vertical direction. The middle wall 37 is a plate and extends from the upper end 351 of the left wall 35 to the upper end 361 of the right wall 36. The middle wall 37 faces each of the lower wall 31 and the upper wall 32 in the vertical direction.

As shown in FIG. 7, a cavity 10 and a housing section 19 are formed inside the casing 2. The cavity 10 is a space surrounded by a top wall 32, a front wall 33, a rear wall 34, and a middle wall 37. As shown in FIG. 6, the upper part of the cavity 10 is connected to the suction port 51. The front portion of the cavity 10 is connected to the suction port 52 . The rear part of the cavity 10 is connected to the suction port 53. The left side of the cavity 10 is connected to the air outlet 55. The right side of the cavity 10 is connected to the air outlet 56. As shown in FIG. 7, the housing portion 19 is a space surrounded by a lower wall 31, a front wall 33, a rear wall 34, a left wall 35, a right wall 36, and a middle wall 37.

On the upper surface of the middle wall 37,

partition walls

371, 372 and a partition wall 375 are erected. The partition wall 371 is erected at the left end 326 of the opening 325 in the left-right direction. The partition wall 372 is erected at the right end 327 of the opening 325 in the left-right direction. The

partition walls

371 and 372 are plates and extend from the front wall 33 to the rear wall 34 and from the middle wall 37 to the top wall 32. A plurality of slits 373 are formed in the partition wall 371. The plurality of slits 373 penetrate the partition wall 371 in the left-right direction. A plurality of slits 374 are formed in the partition wall 372. The plurality of slits 374 penetrate the partition wall 371 in the left-right direction.

The

partition walls

371 and 372 face each other in the left-right direction and partition the cavity 10 into a left cavity 11, a right cavity 12, and a hollow cavity 13. The left cavity 11 is a space on the left side of the partition wall 371 in the cavity 10. The right cavity 12 is a space on the right side of the partition wall 372 in the cavity 10. The hollow part 13 is a space sandwiched between the

partition walls

371 and 372 in the left-right direction in the hollow part 10, and is located below the lid 4. The left hollow portion 11 and the hollow hollow portion 13 are connected to each other via a plurality of slits 373. The right hollow section 12 and the hollow hollow section 13 are connected to each other via a plurality of slits 374.

As shown in FIG. 7, a protrusion 381 and four contact parts 391 are provided on the left side of the partition wall 371. The protrusion 381 protrudes to the left from the center of the left surface of the partition wall 371. The four contact portions 391 protrude leftward from the four corners of the partition wall 371, respectively. FIG. 7 illustrates only two of the four contact parts 391 located at the rear. In the left-right direction, the length of the protruding portion 381 is shorter than the length of the abutting portion 391. A protrusion 382 and four contact parts 392 are also provided on the right side of the partition wall 372. The protrusion 382 protrudes to the right from the center of the right surface of the partition wall 372. The four contact portions 392 protrude to the right from the four corners of the partition wall 372, respectively. FIG. 7 illustrates only two of the four contact parts 392 located at the rear. In the left-right direction, the length of the protruding portion 382 is shorter than the length of the abutting portion 392. The partition wall 375 is erected at the center of the hollow portion 13 in the left-right direction, and partitions the hollow portion 13 in the left-right direction.

As shown in FIG. 7, the housing section 19 houses the control board 9 and the dust sensor flow path section 100. The control board 9 is screwed to the left side of the lower surface of the inner wall 37. The control board 9 is provided with a control circuit (not shown). The control circuit controls the operation of the air cleaner 1. Cable 95 connects power button 8 and control board 9 to each other.

The dust sensor flow path section 100 is installed on the right side of the housing section 19. The dust sensor flow path section 100 is provided between the sensor suction port 14 provided on the rear surface 24 of the housing 2 and the sensor air outlet 15 provided on the right surface 26 . The dust sensor flow path section 100 is a casing formed in a substantially L-shape when viewed from the bottom (see FIG. 9), and includes a flow path 121 inside. The flow path 121 extends from the sensor inlet 14 to the sensor outlet 15. As will be described later, air sucked in from the sensor suction port 14 flows through the flow path 121 and is discharged from the sensor air outlet 15. A dust sensor 18 is provided in the middle of the flow path 121. The dust sensor 18 detects the amount of dust contained in the air flowing through the flow path 121. Note that the specific structure of the dust sensor flow path section 100 will be described later.

The structure of the

blowers

81 and 82 will be explained. As shown in FIG. 6, the air cleaner 1 includes two

blowers

81 and 82. The blower 81 is arranged in the left cavity 11. The blower 81 is a well-known axial fan, and includes a support portion 811, a motor 812, and a fan 813. The support portion 811 is a square cylindrical casing. In the following description, the area surrounded by the right side of the support part 811 will be referred to as the "intake part 816", and the area surrounded by the left side of the support part 811 will be referred to as the "exhaust part 817".

The motor 812 is fixed to the support part 811 and placed at the center within the support part 811. An output shaft (not shown) of the motor 812 extends to the right from the motor 812. The motor 812 is connected to the control board 9 (see FIG. 7) via a cable 93. Fan 813 is disposed within support 811 . A rotating shaft 815 of the fan 813 extends in the left-right direction and is fixed to the output shaft of the motor 812. The fan 813 is rotated by the motor 812 to generate airflow from the intake section 816 to the exhaust section 817. As a result, air flows from the right side of the blower 81 to the left side.

The blower 81 is fixed to the left cavity 11 of the case 3 via a seal member 819 with the intake section 816 disposed on the right side with respect to the exhaust section 817. In this case, the respective tips of the four contact parts 391 (see FIG. 7) contact the right surface of the support part 811. The tip of the protrusion 381 is located away from the fan 813 to the right. The seal member 819 is made of soft urethane foam. The seal member 819 fills the gaps between the peripheral wall of the support portion 811 and each of the top wall 32, front wall 33, rear wall 34, and middle wall 37. The seal member 819 improves the efficiency of air suction by the blower 81.

The blower 82 is arranged in the right cavity 12 and has the same structure as the blower 81. That is, the blower 82 includes a support section 821, a motor 822, and a fan 823. Support portion 821 corresponds to support portion 811 . Motor 822 corresponds to motor 812. An output shaft (not shown) of the motor 822 extends to the left from the motor 822. The motor 822 is connected to the control board 9 (see FIG. 7) via a cable 94. Fan 823 corresponds to fan 813. A rotating shaft 825 of the fan 823 extends in the left-right direction and is fixed to the output shaft of the motor 822. The intake part 826 is an area surrounded by the left side of the support part 821. The exhaust part 827 is an area surrounded by the right side of the support part 821. Seal member 829 corresponds to seal member 819.

The blower 82 is fixed to the right cavity 12 of the case 3 via a seal member 829 with the intake section 826 disposed on the left side with respect to the exhaust section 827. In this case, the respective tips of the four contact parts 392 (see FIG. 7) contact the left surface of the support part 821. The tip of the protrusion 382 is located away from the fan 823 to the left. The fan 823 is rotated by the motor 822 and generates an airflow from the intake section 826 toward the exhaust section 827. As a result, air flows from the left side of the blower 82 to the right side. That is, the

blowers

81 and 82 generate air currents in opposite directions.

The shapes of the

louvers

71 and 72 will be explained. As shown in FIGS. 6 and 7, the louver 71 fits into the air outlet 55. The louver 71 includes a frame 711, a plurality of vertical plates 712, a plurality of wing plates 713, and a plurality of closing plates 714. The frame 711 has the same shape as the air outlet 55, and has a rectangular shape when viewed from the left side. The plurality of vertical plates 712 extend in the vertical direction within the frame 711 and are lined up in the left-right direction. The plurality of blades 713 extend in the front-back direction within the frame 711 and are lined up in the vertical direction. The wing plate 713 slopes downward from the right to the left. A reference line V extending from above to below in the opening direction of the suction port 51 is defined, and an angle that coincides with the reference line V is defined as 0 degrees. The rightward angle θ1 of the blade 713 with respect to the reference line V is 55 degrees.

As shown in FIG. 6, a plurality of openings 715 are formed in the louver 71 within the frame 711 by a plurality of vertical plates 712 and a plurality of wing plates 713. The closing plate 714 is provided at the four corner openings 715 and the central opening 715 among the plurality of openings 715 . Therefore, the user cannot see the inside of the housing 2 from the portion of the left surface 25 of the housing 2 where the blocking plate 714 is located when viewed from the left side. This improves the design of the air cleaner 1. The opening area of the louver 71 is smaller than the opening area of the

suction ports

51, 52, and 53. The opening area of the louver 71 is the total area of the openings 715 that are not closed by the closing plate 714 among the plurality of openings 715.

According to the above configuration of the louver 71, when air flows from the right side of the louver 71 to the left side through the plurality of openings 715, on the left side of the louver 71, the plurality of blades 713 move the air 55 to the left with respect to the reference line V. Air flows in the direction of the slope. In this way, the louver 71 guides the air blown out from the outlet 55 by the blower 81 downward.

The louver 71 is provided with

elastic members

716 and 717.

Elastic members

716 and 717 are fixed to the right side of louver 71. The

elastic members

716 and 717 are sponges. The louver 71 contacts the blower 81 via

elastic members

716 and 717. The blower 81 is pushed from the left to the right by the elastic force of the

elastic members

716 and 717. The plurality of contact portions 391 receive the elastic force of the

elastic members

716 and 717 via the blower 81. Thereby, the position of the blower 81 in the left and right direction is maintained.

The louver 72 fits into the air outlet 56. The louver 72 has the same structure as the louver 71, and includes a frame 721, a plurality of vertical plates 722, a plurality of feather plates 723, and a plurality of closing plates 724. Frame 721 corresponds to frame 711. Vertical plate 722 corresponds to vertical plate 712. The wing plate 723 corresponds to the wing plate 713. The rightward angle θ2 of the wing plate 723 with respect to the reference line V is 55 degrees. Closure plate 724 corresponds to closure plate 714 . A plurality of openings 725 are formed in the louver 72. Aperture 725 corresponds to aperture 715. The opening area of the louver 72 is smaller than the opening area of the

suction ports

51, 52, and 53. The opening area of the louver 72 is the total area of the openings 725 that are not closed by the closing plate 724 among the plurality of openings 725.

According to the above configuration of the louver 72, when air flows from the left side to the right side of the louver 72 through the plurality of openings 725, on the right side of the louver 72, the plurality of blades 723 move the air 55 to the right with respect to the reference line V. Air flows in the direction of the slope. In this way, the louver 72 guides the air blown out from the outlet 56 by the blower 82 downward.

The louver 72 is provided with

elastic members

726 and 727.

Elastic members

726 and 727 correspond to

elastic members

716 and 717. The louver 72 contacts the support portion 821 via

elastic members

726 and 727. The position of the blower 81 in the left-right direction is maintained by the elastic force of the

elastic members

716 and 717 and the plurality of contact parts 392.

The structure of the filter 6 will be explained. As shown in FIGS. 5 to 7, the air cleaner 1 includes a filter 6. As shown in FIGS. The filter 6 is arranged in the hollow part 13 and can be attached to and removed from the hollow part 13. The filter 6 is a HEPA filter and purifies the air by removing viruses, dirt, dust, etc. from the air. As shown in FIG. 6, the filter 6 has a pleated structure and includes an upper filter 61, a front filter 62, and a rear filter 63.

The upper filter 61 extends in the front, rear, left and right directions. The front filter 62 extends in the left-right direction and extends downward from the front end of the upper filter 61. The rear filter 63 extends in the left-right direction and extends downward from the rear end of the upper filter 61. The rear filter 63 faces the front filter 62 in the front-rear direction. Therefore, the cross-sectional shape of the filter 6 taken along a plane perpendicular to the left-right direction is a U-shape that opens downward.

As shown in FIG. 6, with the filter 6 disposed in the hollow part 13 and the lid 4 attached to the case 3, the upper filter 61 is located below the suction port 51, and the front filter 62 is located under the suction port 51. The rear filter 63 is located on the rear side of the port 52 and the rear filter 63 is located on the front side of the suction port 53.

As shown in FIG. 5, with the filter 6 disposed in the hollow portion 13 and the lid 4 removed from the case 3, the upper filter 61 is exposed from the opening 325. The length of the filter 6 in the front-rear direction is shorter than the length of the opening 325 in the front-rear direction. The length of the filter 6 in the left-right direction is shorter than the length of the opening 325 in the left-right direction. Therefore, the user can attach and detach the filter 6 to and from the hollow portion 13 via the opening 325.

As shown in FIG. 6, a pair of shape-retaining

members

64 and 65 are adhered to both left and right ends of the filter 6. The pair of

shape retaining members

64 and 65 have a plate shape and are made of nonwoven fabric. A sealing member 66 is adhered to the left side of the shape-retaining member 64, and a sealing member 67 is adhered to the right side of the shape-retaining member 65. The seal members 66 and 67 have the same cross-sectional shape as the filter 6, and are U-shaped with a downward opening. The seal members 66 and 67 are made of soft urethane foam. The sealing member 66 fills the gap between the shape-retaining member 64 and the partition wall 371 in the left-right direction, thereby increasing the airtightness within the housing 2. The sealing member 67 fills the gap between the shape-retaining member 65 and the partition wall 372 in the left-right direction, thereby increasing the airtightness within the housing 2. The seal members 66 and 67 improve the efficiency of air suction by the

blowers

81 and 82 through the filter 6.

The structure of the dust sensor flow path section 100 will be explained with reference to FIGS. 7 to 9. The dust sensor flow path section 100 includes a first flow path section 101, a sensor frame section 102, a second flow path section 103, a dust sensor 18, and a flow path 121 in order from the upstream side to the downstream side in the direction of air flow. Be prepared.

The first flow path portion 101 is a substantially square cylindrical casing, and has a substantially L-shape when viewed from the bottom, as shown in FIG. 9 . A bent portion 105 is provided approximately in the middle of the first flow path portion 101 in the length direction. The bent portion 105 is bent into a substantially L-shape when viewed from the bottom. One end of the first flow path section 101 on the upstream side is connected to the sensor suction port 14 . The first flow path portion 101 extends forward from the sensor suction port 14 and is bent 90° to the right at a bent portion 105 . The first flow path portion 101 extends from the bent portion 105 to the right.

The sensor frame section 102 is a box with a hollow interior, into which air that has flowed through the first flow path section 101 flows. Dust sensor 18 is supported within sensor frame portion 102 . The dust sensor 18 detects dust in the air that has entered the sensor frame section 102. The dust sensor 18 is a well-known reflective sensor. The reflective sensor includes a light emitting section and a light receiving section (not shown). The light emitting part irradiates light onto dust in the air. The light emitting section is, for example, an LED. The light receiving unit detects dust in the air by receiving the reflected light reflected by the dust in the air. The light receiving section is, for example, a phototransistor. Note that the dust detection principle of the dust sensor 18 is not limited to the reflective type, and a photointerrupter may be used, for example. A photointerrupter is a sensor that combines an LED and a phototransistor, and uses infrared light to detect the presence of dust. There are two types of photointerrupters: a transmissive type and a reflective type, and either one may be used.

The sensor frame section 102 has a channel cross section wider in the front-rear direction and vertical direction than the channel section of the first channel section 101, and has a space wider than the inner space of the first channel section 101. As a result, compared to a configuration in which the flow path cross section of the sensor frame section 102 is the same as or smaller than the flow path cross section of the first flow path section 101, the light emitted by the light emitting section of the dust sensor 18 is transmitted to the sensor frame section 102. It is possible to reduce the possibility of erroneous detection due to diffuse reflection on the inner surface and the reflected light being received by the light receiving section.

The second flow path portion 103 is a substantially rectangular cylindrical casing having the same flow cross section as the first flow path portion 101. The second flow path section 103 extends substantially linearly in a bottom view from an opening (not shown) provided on the right side surface of the sensor frame section 102 to the sensor air outlet 15 provided on the right side surface 26 of the housing 2 . The second flow path section 103 includes a horizontal section 107 and an inclined section 108. The horizontal portion 107 linearly extends rightward and horizontally from the opening on the right side of the sensor frame portion 102 . The inclined portion 108 is inclined obliquely upward as it goes rightward from the end of the horizontal portion 107 and is connected to the sensor air outlet 15 provided on the right surface 26 . The flow path 121 is an air flow path formed by spaces inside each of the first flow path section 101, the sensor frame section 102, and the second flow path section 103.

With reference to FIG. 8, the distance between the blower 82, the sensor outlet 15, and the dust sensor 18 will be explained. In the left-right direction, the distance L1 from the center Q of the blower 82 to the sensor outlet 15 is 21.9 mm. The center of the blower 82 is the midpoint of the blower 82 in the vertical and horizontal directions. In the left-right direction, the shortest distance L2 from the outer edge of the blower 82 to the sensor outlet 15 is 9.1 mm. In the vertical direction, the distance L3 from the center Q of the blower 82 to the bottom surface 21 is 60.15 mm. In the vertical direction, the shortest distance L4 from the outer edge of the blower 82 to the bottom surface 21 is 27.5 mm. In the left-right direction, the shortest distance L5 from the outer edge of the dust sensor 18 to the right end surface of the blower 82 is 50 mm. Note that the numerical values of each of these distances L1 to L5 are just examples and can be changed as appropriate.

　How to use the air purifier 1 will be explained. The air cleaner 1 is used by being installed on the top surface of a desk, for example. The user presses the power button 8 (see FIG. 1) to switch the power of the air cleaner 1 from off to on. As a result, power is supplied to the air purifier 1, and the air purifying operation by the air purifier 1 is started.

As shown in FIG. 7, the control board 9 drives the

motors

812, 822 of the

blowers

81, 82, and rotates the

fans

813, 823. As the fan 813 rotates, airflow is generated from the intake section 816 toward the exhaust section 817. As the fan 823 rotates, airflow is generated from the intake section 826 toward the exhaust section 827. As a result, air is sucked into the hollow portion 13 from the outside of the casing 2 through the suction ports 51 to 53.

The air sucked into the hollow part 13 passes through the filter 6. Air sucked into the hollow part 13 through the suction port 51 passes through the upper filter 61 from the upper side to the lower side. Air sucked into the hollow portion 13 through the suction port 52 passes through the front filter 62 from the front side to the rear side. Air sucked into the hollow portion 13 through the suction port 53 passes through the rear filter 63 from the rear side to the front side. Thereby, the filter 6 cleans the air sucked into the hollow part 13.

The air that has passed through the filter 6 is branched to the left and right, one of which flows into the left cavity 11 through the slit 373 of the partition wall 371 and flows toward the air outlet 55. The other fluid flows into the right cavity 12 through the slit 374 of the partition wall 372 and flows toward the air outlet 56 . The air that has flowed toward the air outlet 55 flows from the intake section 816 toward the exhaust section 817. The air that has flowed toward the air outlet 56 flows from the intake section 826 toward the exhaust section 827. The air flowing from the intake section 816 toward the exhaust section 817 is blown out to the left of the housing 2 from the air outlet 55 while being guided downward by the louver 71. The air flowing from the intake section 826 toward the exhaust section 827 is blown out to the right of the housing 2 from the air outlet 56 while being guided downward by the louver 72 .

With reference to FIGS. 10 and 11, the flow of air that occurs within the dust sensor flow path section 100 will be described. FIG. 10 is an analysis of the airflow generated within the dust sensor flow path section 100 during operation of the air cleaner 1. As shown in FIG. 10, while the air cleaner 1 is in operation, the air flowing from the intake section 826 of the blower 82 toward the exhaust section 827 (see FIG. 6) on the right side 26 of the housing 2 is directed downward by the louver 72. The air is blown out to the right of the casing 2 from the air outlet 56 while being guided by the air.

In the A1 region near the air outlet 56, air is blown out diagonally downward onto the desk 20 while swirling clockwise in the left side view (see arrow G1 in FIG. 11) around the rotation axis 825. At this time, since the A2 area directly below the air outlet 56 becomes negative pressure, the air near the sensor air outlet 15 is pulled into the A2 area (see arrow A3). Accordingly, the air in the flow path 121 of the dust sensor flow path section 100 is pulled into the A2 area via the sensor air outlet 15. Since the inside of the flow path 121 becomes a negative pressure, external air is sucked in from the sensor suction port 14. As a result, a flow of air is generated in the flow path 121 from the sensor suction port 14 toward the sensor blowout port 15 (see the double-dashed chain arrow F shown in FIGS. 8 and 9). Therefore, the air cleaner 1 can stably supply air to the dust sensor 18 supported within the dust sensor flow path section 100 without separately providing a fan, a heater, or the like.

The sensor outlet 15 opens toward the right, and the blade 150 extends forward (see FIG. 8). Therefore, the air that has flowed through the flow path 121 of the dust sensor flow path section 100 is discharged to the right by the blade 150. On the other hand, the air blown out from the air outlet 56 flows diagonally downward toward the top of the desk 20. That is, the flow direction of the air blown out from the air outlet 56 intersects with the flow direction of the air exhausted from the sensor air outlet 15. The air discharged from the sensor outlet 15 is pushed further to the right by the air blown out from the outlet 56. As a result, the air discharged from the sensor outlet 15 is further pulled to the right, so that the pressure near the sensor outlet 15 can be made more negative. Therefore, the air cleaner 1 can efficiently take air into the flow path 121 of the dust sensor flow path section 100.

With reference to FIG. 11, the position of the sensor air outlet 15 will be specifically described. Near the exhaust part 827 (see FIG. 6) of the blower 82, air is blown out obliquely downward from the air outlet 56 while swirling clockwise in the left side view (see arrow G1 in FIG. 11) (see FIG. 10). . Here, when the right surface 26 of the casing 2 is viewed from the right, downstream G2 occurs in a region below the air outlet 56 and closer to the rear surface 24 than the center line P. The downstream G2 is a flow of air flowing from diagonally upward on the rear side of the housing 2 toward diagonally downward on the front side. It is preferable to arrange the sensor air outlet 15 in accordance with the area of this downstream G2. This makes it easier for a part of the air in the downstream G2 to flow to the vicinity of the sensor outlet 15, so that the vicinity of the sensor outlet 15 can be more effectively and stably brought into negative pressure. Therefore, the air cleaner 1 can more efficiently take in air into the flow path 121 of the dust sensor flow path section 100.

The effects of this embodiment will be explained. The effects of this embodiment described below are merely examples. In this embodiment, on the right side 26 of the housing 2, the air outlet 56 and the sensor air outlet 15 open on the same side of the housing 2, that is, the right side, so the flow of air blown out from the air outlet 56 causes The pressure near the sensor outlet 15 becomes negative. As a result, an air flow is generated in the flow path 121 of the dust sensor flow path section 100 from the sensor suction port 14 on the rear surface 24 toward the sensor air outlet 15 on the right surface 26 . Therefore, the air cleaner 1 can supply air to the dust sensor 18 in the dust sensor flow path section 100 without separately installing a heater or fan. Since there is no need to separately install a heater or fan, the air cleaner 1 can suppress an increase in the number of parts, and can also suppress an increase in power consumption.

The blower 82 is an axial fan, and the direction in which the rotating shaft 825 of the blower 82 extends is the same as the direction in which the sensor outlet 15 opens. On the right side 26 of the housing 2 , the sensor outlet 15 is arranged at a position closer to the rotation axis 825 of the blower 82 . Thereby, the air purifier 1 can efficiently flow the air generated by the blower 82 toward the sensor outlet 15 side, so that air can be efficiently taken into the flow path 121 of the dust sensor flow path section 100. I can do it.

The casing 2 has a bottom surface 21, and the sensor air outlet 15 is provided closer to the bottom surface 21 than the height position of the rotating shaft 825. Thereby, for example, when the air cleaner 1 is installed on the desk 20, the air blown out from the sensor outlet 15 can be prevented from directly hitting the user's face.

The flow direction of the air adjusted by the louver 71 at the air outlet 56 intersects with the direction in which the sensor air outlet 15 opens. As a result, the air discharged from the sensor outlet 15 is pushed even more forcefully to the right by the air blown out from the outlet 56. As a result, the air discharged from the sensor outlet 15 is further pulled to the right, so that the pressure near the sensor outlet 15 can be made more negative. Therefore, the air cleaner 1 can efficiently take air into the flow path 121 of the dust sensor flow path section 100.

The blower 82 is an axial fan that rotates around a rotating shaft 825. When the right surface 26 of the housing 2 is viewed from the axial direction of the rotation shaft 825, the sensor air outlet 15 is located closer to the bottom surface 21 than the height of the rotation shaft 825, and is located around the rotation shaft 825 formed by the blower 82. Of the air flows, the sensor outlet 15 is arranged in accordance with the region of the downstream G2 toward the bottom surface 21 side. Since a part of the air in the downstream G2 easily flows to the vicinity of the sensor outlet 15, the vicinity of the sensor outlet 15 can be more effectively and stably brought into negative pressure. If the sensor outlet 15 is provided in the area of the upstream G3 that is directed toward the side opposite to the bottom surface 21 of the air flow around the rotation axis 825, the upstream G3 will flow from the outlet 56 to the blade of the louver 72. Depending on the direction of 723, it may be offset by the air flow guided downward, and the wind speed may become small. From this, air can be taken in more efficiently from the sensor suction port 14 provided on the rear surface 24 of the housing 2 by providing the sensor air outlet 15 in accordance with the downstream G2 region rather than the upstream G3 region. be able to.

The suction port 53 and the sensor suction port 14 are provided on the rear surface 24 of the housing 2. Therefore, the air around the air cleaner 1 flowing into the suction port 53 can also be taken into the sensor suction port 14 . Thereby, the air cleaner 1 can easily measure the air quality around the air cleaner 1. In addition, since the sensor suction port 14 is provided on a surface different from the right surface 26 where the air outlet 56 is provided, it is possible to reduce the amount of outside air entering the sensor suction port 14 due to the airflow of the blower 82.

The dust sensor 18 is a reflective optical sensor. The rear surface 24 and right surface 26 of the housing 2 extend in directions perpendicular to each other. The dust sensor flow path portion 100 includes a bent portion 105 that is bent between the sensor suction port 14 and the installation portion of the dust sensor 18 . As a result, even if indoor light enters the sensor suction port 14, it is blocked by the bent portion 105, making it difficult for the indoor light to enter the part where the dust sensor 18 is installed. Therefore, the air cleaner 1 can reduce the possibility of indoor light entering from the sensor suction port 14 directly hitting the dust sensor 18 and causing detection failure.

In the housing 2, the left surface 25, which includes the air outlet 55, and the right surface 26, which includes the air outlet 56, face each other. The rear surface 24, which includes the suction port 53 and the sensor suction port 14, extends between the left surface 25 and the right surface 26. A blower 82 is installed in the left cavity 11 within the housing 2 . The blower 82 generates a flow of air from the suction port 53 toward the outlet 55 via the hollow section 13 and the left hollow section 11 . The sensor suction port 14 is arranged closer to the right surface 26 than the left surface 25 in the rear surface 24 . Thereby, the length of the dust sensor flow path section 100 can be made shorter than when the sensor suction port 14 is arranged closer to the left surface 25 than the right surface 26. The shorter the length of the dust sensor flow path section 100, the more negative pressure generated within the flow path 121 can be maintained, so the air cleaner 1 can stably take in air into the dust sensor flow path section 100.

The opening area of the sensor air outlet 15 is smaller than the opening area of the air outlet 56. Note that the "opening area of the sensor air outlet 15" is the sum of the opening area of the upper air outlet 151 and the opening area of the lower air outlet 152. As a result, compared to the case where the opening area of the sensor air outlet 15 is larger than the opening area of the air outlet 56, the air flow blown out from the air outlet 56 allows the dust sensor flow path section in which the dust sensor 18 is installed to Air can be efficiently taken into the interior of the housing 100.

The opening area of the sensor air outlet 15 is smaller than the opening area formed by the blades 723 at the air outlet 56. Note that the "opening area formed by the blades 723" is the sum of the opening areas of the openings 725 that are not closed by the closing plate 724 among the plurality of openings 725 formed by the blades 723 in the louver 72. be. As a result, compared to the case where the opening area of the sensor outlet 15 is larger than the opening area formed by the blade 723 at the air outlet 56, the air flow from the blade 723 allows the sensor air outlet 15 to be Since the pressure can be made more negative, air can be efficiently taken into the dust sensor flow path section 100.

The dust sensor flow path section 100 includes a second flow path section 103. The second flow path section 103 is provided between the sensor frame section 102 and the sensor outlet 15. The second flow path portion 103 extends from the sensor frame portion 102 side to the sensor air outlet 15 and is inclined toward the air outlet 56 side. Thereby, the sensor air outlet 15 can be brought closer to the air outlet 56 on the right side 26 of the housing 2 . That is, compared to the case where the sensor air outlet 15 is far away from the air outlet 56, more air can be blown out from the air outlet 56 near the sensor air outlet 15. Therefore, the pressure near the sensor outlet 15 can be made more negative, so the air cleaner 1 can efficiently take in air into the dust sensor flow path section 100. Further, since the dust sensor flow path section 100 is inclined in the second flow path section 103, it is possible to reduce the indoor light entering from the sensor air outlet 15 from directly entering the dust sensor 18 in the sensor frame section 102. . Therefore, the air cleaner 1 can reduce the possibility of indoor light entering from the sensor outlet 15 directly hitting the dust sensor 18 and causing detection failure.

A wing plate 150 is provided at the sensor air outlet 15. The wing plate 150 adjusts the direction in which the air blown out from the sensor outlet 15 flows toward the right side of the housing 2 . As a result, the flow direction of the air adjusted by the blades 723 of the louver 72 and the flow direction of the air adjusted by the blades 150 intersect at the air outlet 56. Even if there is a limit to the adjustment angle of the blade 723, the flow direction of the air blown out from the sensor outlet 15 can be made to intersect with the flow direction of the air adjusted by the blade 150 by the blade 150. I can do it. Thereby, the pressure near the sensor outlet 15 can be made more negative, so that air can be efficiently taken into the dust sensor flow path section 100.

In the above description, the right surface 26 of the housing 2 is an example of the "first blowing surface" of the present invention. The left surface 25 of the housing 2 is an example of the "second blowing surface" of the present invention. The rear surface 24 is an example of the "suction surface" of the present invention. The suction port 53 is an example of the "first suction port" of the present invention. The cavity 10 within the housing 2 is an example of the "first flow path" of the present invention. The air outlet 56 is an example of the "first air outlet" of the present invention. The air outlet 55 is an example of the "second air outlet" of the present invention. The blower 82 is an example of the "first blower" of the present invention. The blower 81 is an example of the "second blower" of the present invention. The sensor suction port 14 is an example of the "second suction port" of the present invention. The dust sensor flow path section 100 is an example of the "second flow path" of the present invention. The sensor air outlet 15 is an example of the "second air outlet" of the present invention. The blade 723 of the louver 72 is an example of the "first blade" of the present invention. The blade 150 of the sensor air outlet 15 is an example of the "second blade" of the present invention.

The present invention is not limited to the above embodiments, and various modifications are possible. In the above embodiment, as shown in FIG. 8, the sensor air outlet 15 opens toward the right and includes a wing plate 150 extending in the left-right direction. For example, the blade may be inclined in the same direction as the inclined part 108 of the dust sensor flow path section 100. For example, as shown in FIG. 12, the sensor air outlet 45 opens to the right, but the blade 450 opens in the same direction as the inclined part 108 of the dust sensor flow path section 100, that is, diagonally upward with respect to the right side. tilt to. Thereby, the air flowing along the slope part 108 of the dust sensor flow path section 100 flows diagonally upward along the slope direction of the blade plate 450, so that the pressure loss occurring within the dust sensor flow path section 100 can be reduced. This makes it easier for air to flow into the dust sensor flow path section 100. In addition to this, it is even better if the upper surface 455 of the upper air outlet 451 and the lower surface 456 of the lower air outlet 452 are also formed obliquely upward in accordance with the inclination of the blade 450. Thereby, the pressure loss occurring within the dust sensor flow path section 100 can be further reduced.

In the above embodiment, the sensor outlet 15 is arranged on the right side 26 of the housing 2 in accordance with the downstream region G2 of the air blown out from the outlet 56, but the position and shape of the sensor outlet are It is not limited to the above embodiment. For example, as shown in FIG. 13, when the right side 26 of the air cleaner 110 is viewed from the axial direction of the rotating shaft 825, the sensor air outlet 75 is arranged on the concentric circle R of the rotating shaft 825. Further, the sensor air outlet 75 has a rectangular shape extending in the direction of the tangent S to the concentric circle R. With such an arrangement and shape, the blower 82 and the sensor outlet 75 can be arranged close to each other, so that the air cleaner 1 can be made smaller.

Although the air cleaner 1 includes three suction ports 51 to 53, the number of suction ports is not limited, and may be one, for example. Although the air cleaner 1 includes two

blowers

81 and 82, the number of blowers is not limited, and may be one, for example. Although the

blowers

81 and 82 are axial fans, other blowing methods may be used.

In the rear surface 24 of the casing 2, the sensor suction port 14 is provided closer to the right surface 26 than the left surface 25 with respect to the middle part in the left-right direction, but it may be provided in another position, and it may be provided in a surface other than the rear surface 24. It may be provided.

Although the second flow path section 103 of the dust sensor flow path section 100 includes an inclined section 108 on the downstream side, the inclined section 108 may be omitted and the horizontal section 107 may be extended to the right as it is.

The shapes of the sensor inlet 14 and the sensor outlet 15 do not have to be rectangular. Although the sensor air outlet 15 includes a blade 150, the number of blades 150 may be plural or may be omitted.

1 Air cleaner 2 Housing 3 Case 10 Cavity 14 Inlet for sensor 15 Outlet for sensor 18 Dust sensor 24 Rear surface 26 Right side 45 Outlet for sensor 53

Inlet

55, 56 Outlet 72 Louver 75 Outlet for sensor 81 Blower 82 Air blower 100 Dust sensor flow path section 101 First flow path section 103 Second flow path section 105 Bend section 108 Inclined section 110 Air cleaner 121

Channels

150, 450, 723 Blade 823 Fan 825 Rotating shaft G2 Downstream

Claims

A casing including a blowing surface;
a first suction port that opens in the housing and sucks air;
a first flow path provided in the housing, through which the air sucked from the first suction port flows;
a first air outlet that opens on the air outlet surface and blows out the air that has flowed through the first flow path;
a filter installed in the first flow path to clean the air flowing through the first flow path;
a first blower installed in the first flow path and generating the air flow from the first suction port toward the first blowout port;
a second suction port that opens in the housing and sucks air;
a second flow path provided in the housing, through which the air sucked from the second suction port flows;
a second blowout port that opens on the blowout surface and blows out the air that has flowed through the second flow path;
a dust sensor installed in the second flow path to detect dust in the air flowing through the second flow path;
The air cleaner is characterized in that the first air outlet and the second air outlet open on the same side of the housing.
The first blower is an axial fan,
The direction in which the rotating shaft of the axial fan extends and the direction in which the second air outlet opens are the same,
The air cleaner according to claim 1, wherein the second air outlet is arranged closer to the rotating shaft.
The housing has a bottom surface,
The air cleaner according to claim 2, wherein the second air outlet is provided closer to the bottom surface than a height position of the rotating shaft.
The first air outlet is provided with a first blade that adjusts the flow direction of the air blown out from the first air outlet,
The air cleaner according to claim 2, wherein the direction in which the air flows adjusted by the first blade intersects the direction in which the second air outlet opens.
The first blower is the axial fan that rotates around the rotation axis,
When the blowing surface is viewed from the axial direction of the rotating shaft, the second blowing outlet is located closer to the bottom surface than the height of the rotating shaft, and is located at a position around the rotating shaft formed by the axial fan. The air cleaner according to claim 3, wherein the air cleaner is provided in a region corresponding to a flow toward the bottom surface of the air flow.
The first blower is the axial fan that rotates around the rotation axis,
The air cleaner according to claim 2, wherein when the blowing surface is viewed from the axial direction of the rotating shaft, the second blowing outlet extends on a concentric circle of the rotating shaft and in a tangential direction of the concentric circle. Machine.
The air cleaner according to claim 1, wherein the first suction port and the second suction port are provided on a suction surface of the casing.
The dust sensor is a reflective optical sensor,
The suction surface and the blowout surface extend in a direction that intersects with each other,
8. The air cleaner according to claim 7, wherein the second flow path includes a bent portion that is bent between the second suction port and the installation portion of the dust sensor.
The blowing surface includes a first blowing surface and a second blowing surface facing the first blowing surface,
the suction surface extends between the first blowout surface and the second blowout surface;
The first flow path includes a third outlet opening to the second outlet surface,
a second blower installed in the first flow path and generating the air flow from the first suction port toward the third outlet;
The air cleaner according to claim 7, wherein the second suction port is disposed closer to the first blowing surface than the second blowing surface on the suction surface.
The air cleaner according to claim 1, wherein the opening area of the second air outlet is smaller than the opening area of the first air outlet.
The air cleaner according to claim 4, wherein the opening area of the second air outlet is smaller than the opening area formed by the first blade at the first air outlet.
The dust sensor is a reflective optical sensor,
The second flow path is between the installation part of the dust sensor and the second air outlet, and is an inclined part that slopes from the installation area of the dust sensor to the second air outlet and toward the first air outlet. The air cleaner according to claim 1, further comprising:
The second air outlet is provided with a second blade that adjusts the flow direction of the air blown out from the second air outlet,
The air cleaner according to claim 4, wherein the direction in which the air flows adjusted by the first blade and the direction in which the air flows adjusted by the second blade intersect.
The second air outlet is provided with a second blade that adjusts the direction in which the air blown out from the second air outlet flows in the same direction as the direction in which the inclined portion is inclined. The air cleaner according to claim 12.