Air cleaner

Abstract

To provide an air cleaner capable of stably maintaining efficiency in the case of cleaning air, independently of the direction that air suction port faces.SOLUTION: An air cleaner 1 includes a fan unit 5 having, at least, a first casing 50 having a first wall face 50U where a first suction port 55 is provided and a second wall face where air blowout port is provided, a fan for sucking air, and a cleaning member for cleaning air, and a support body 3 for rotatably supporting the fan unit 5 around a first axis, the first wall face 50U being arranged at a position intersecting with a virtual second axis perpendicular to the first axis. When the direction parallel to the second axis and heading from the first wall face 50U to the fan is defined as a specified direction, the first suction port 55 is located uppermost-stream of the air cleaner 1 in th specified direction in the state that the first suction port 55 is wholly located above the fan in the vertical direction.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to an air purifier. [Background technology]

[0002] An air purifier capable of switching the direction of the air intake has been proposed. For example, the local cleaning type air purifier described in Patent Document 1 includes a main body and a support part. The main body has a casing with an intake port and an outlet port. A fan motor, a fan, a filter, a photocatalyst, and a light source are provided inside the casing. The fan is rotated by the fan motor to draw air in through the intake port. The drawn-in air is purified by the filter and the photocatalyst. The purified air is blown out through the outlet port. The support part includes a base member, a pair of support members, and a connecting member. The pair of support members extend upward from the base member. The pair of support members rotatably support the main body. The direction of the intake port is switched by the rotation of the main body. The connecting member is provided across the upper ends of the pair of support members. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2000-18654 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the local air purifier described in Patent Document 1, the main body may be rotated for use so that the intake port faces upward and the exhaust port faces downward. In this case, the flow of air sucked toward the intake port may be obstructed by the connecting member of the support. In this case, there is a problem that the efficiency of air purification by the filter and photocatalyst of the main body decreases.

[0005] An object of the present invention is to provide an air purifier that can stably maintain air purification efficiency regardless of the direction in which the air inlet faces. [Means for solving the problem]

[0006] The air purifier of the present invention is an air purifier comprising a first housing having a first wall surface on which a first suction port which is an air intake port is provided and a second wall surface on which an air outlet port is provided, a fan unit provided inside the first housing and having at least a fan which draws in air from the first suction port and a cleaning member which purifies the air, and a support which supports the fan unit rotatably around a virtual first axis extending horizontally, wherein the first wall surface is arranged at a position which intersects with a virtual second axis which is perpendicular to the first axis, and is parallel to the second axis, and when a direction from the first wall surface toward the fan is defined as a specific direction, the first suction port is located at the most upstream of the air purifier in the specific direction, with the entire first suction port being located vertically above the fan.

[0007] In the air purifier, the flow of air drawn toward the first suction port is not obstructed by other components of the air purifier, and therefore the air purifier can stably maintain the efficiency of purifying the air with the purifier of the fan unit regardless of the direction in which the first suction port faces. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view of the air purifier 1 as viewed from above. [Diagram 2] FIG. 2 is a front view of the air purifier 1. [Diagram 3] FIG. 2 is a perspective view of the air purifier 1 as viewed from below. [Figure 4] FIG. [Diagram 5] 2 is a perspective view of the air purifier 1 with the first housing 50 and the flow regulator 26 removed. FIG. [Figure 6] FIG. [Figure 7] 13 is a perspective view showing the internal configuration of the right support body 3R. FIG. [Figure 8] FIG. 11 is a perspective view showing the internal configuration of the left support body 3L. [Figure 9] 13 is a left side view showing the left protrusion 57L, the restriction plate 35, the cable 58, and the guide portion 59. FIG. [Figure 10] 2 is a cross-sectional view taken along line XX in FIG. 1, seen from the direction of the arrow. [Figure 11] 1 is a perspective view of the air purifier 1 from which the first housing 50, the flow conditioner 26, the first housing 141, the second housing 142, the third housing 143, the fourth housing 144, the fifth housing 145, and the frame 86 have been removed. [Figure 12] 2 is a perspective view of the first filter 7 and the second filter 8 as viewed from below. FIG. [Figure 13] FIG. 2 is a perspective view of the fan 6 as viewed from above. [Figure 14] 13 is a diagram showing the height from the placement surface to the lowest point and the highest point of a first suction port 55. FIG. [Figure 15] 13 is a left side view showing the left protrusion 57L, the restriction plate 35, the cable 58, and the guide portion 59. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] An embodiment of an air purifier 1 according to the present invention will be described with reference to the drawings. The drawings to be referred to are used to explain technical features that may be adopted by the present invention. The configurations of the device described are merely illustrative examples and are not intended to be limiting. The top, bottom, bottom left, top right, bottom right, and top left of FIG. 1 are the top, bottom, front, back, right, and left of the air purifier 1, respectively. The up-down direction is referred to as the "vertical direction."

[0010] <Overview of Air Purifier 1> The air purifier 1 draws air into the interior and removes dust, allergens such as mold and pollen, viruses, bacteria, odors, etc. (hereinafter referred to as "substances to be removed") from the air. The air purifier 1 blows the air from which the substances to be removed have been removed to the outside. In this way, the air purifier 1 purifies the surrounding air. As shown in FIG. 1, the air purifier 1 has a base 2, a support 3, and a fan unit 5.

[0011] <Base 2> The base 2 is placed on a placement surface when the air purifier 1 is installed. The base 2 supports a support 3 and a fan unit 5, which will be described later, from below. As shown in FIGS. 1 to 3, the base 2 has a base 21 and a frame 25.

[0012] As shown in Fig. 3, the shape of the base 21 is substantially circular. An imaginary third axis C3 (see Figs. 2 and 3) is defined that extends vertically through the center of the base 21. The base 21 is perpendicular to the third axis C3.

[0013] Casters 231, 232, 233, 234 and adjusters 241, 242, 243, 244 are provided on the underside and near the periphery of base 21. Casters 231-234 are provided for moving air purifier 1 in the horizontal direction. Adjusters 241-244 protrude downward from base 21. A user can adjust the amount of protrusion from base 21 by rotating adjusters 241-244.

[0014] 4, a first gear 15, rollers 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 176, 177, 178, 179, and a plate 17 are provided on the upper surface of base 21. First gear 15 and rollers 161-179 are provided to rotate a frame 25, which will be described later, relative to base 21. Plate 17 is provided to detect the rotational position by a first sensor 251, which will be described later.

[0015] The first gear 15 is provided on the outer surface of the cylindrical wall portion 150 centered on the third axis C3. The rollers 161 to 179 are provided near the peripheral portion of the base 21. The rollers 161 to 179 are cylindrical in shape. The center lines of the rollers 161 to 179 extend along the radial direction centered on the third axis C3. The rollers 161 to 179 have two protruding portions 160 protruding from each of the two opposing bottom surfaces in a direction perpendicular to the bottom surfaces. The two protruding portions 160 are rotatably supported by the base 21. The rollers 161 to 179 are rotatable relative to the base 21. The plate body 17 is provided inside the first gear 15. The plate body 17 is substantially circular in shape centered on the third axis C3. A part of the plate body 17 is cut out.

[0016] A power cable 27 is connected to the rear end of the base 21. The power cable 27 supplies power for driving a first motor 250 (see FIG. 5), a second motor 43 (see FIG. 7), a fan 6 (see FIG. 10), and the like, which will be described later.

[0017] 1 to 3, frame 25 is provided above pedestal 21. Frame 25 is supported from below by pedestal 21. Frame 25 has a bottom wall 25A (see FIG. 5) and a flow regulator 26 (see FIGS. 1 and 2).

[0018] As shown in Fig. 5, the bottom wall 25A has a generally circular shape with two notches cut out at its periphery. The rollers 161-179 of the base 21 come into contact with the lower surface of the bottom wall 25A. The bottom wall 25A is supported by the rollers 161-179 so as to be rotatable about the third axis C3. In the following, unless otherwise specified, the directions of each component (front-rear, left-right, and vertical) will be described based on the state in which the two notched portions of the bottom wall 25A face each other in the left-right direction (the state shown in Fig. 1).

[0019] The first motor 250 and the first sensor 251 are provided on the upper surface of the bottom wall 25A and in front of the third axis C3. The rotation shaft of the first motor 250 extends downward. The second gear 18 shown in FIG. 4 is connected to the rotation shaft of the first motor 250. The second gear 18 meshes with the first gear 15 of the base 21. When the first motor 250 rotates, the second gear 18 moves in a circumferential direction along the first gear 15. As a result, the frame 25 rotates around the third axis C3 relative to the base 21. The first sensor 251 is provided behind the first motor 250. The first sensor 251 can detect the position where the notch is formed in the plate body 17 of the base 21 shown in FIG. 4.

[0020] As shown in FIG. 2, the flow regulator 26 is provided above the bottom wall 25A and covers the bottom wall 25A. As shown in FIG. 6, the flow regulator 26 has an apex 26A, an inclined portion 26B, and a side portion 26C. The shape of the apex 26A and the inclined portion 26B is a substantially quadrangular pyramid. The apex 26A corresponds to the apex of the substantially quadrangular pyramid. The apex 26A is located at the uppermost position in the vertical direction of the flow regulator 26. The apex 26A is disposed at a position overlapping with the third axis C3. The inclined portion 26B corresponds to a side surface of the substantially quadrangular pyramid. The inclined portion 26B extends downward from the apex 26A in a direction inclined with respect to the vertical direction. The side portion 26C extends downward from the lower end of the inclined portion 26B.

[0021] 2, the apex angle of the flow straightener 26 corresponds to the angle between two generatrix lines extending from the apex portion 26A along the inclined portion 26B when the flow straightener 26 is viewed from the front. The apex angle of the flow straightener 26 is, for example, 170 degrees.

[0022] <Support 3> The support 3 rotates about a third axis C3 in response to the rotation of the frame 25 of the base 2. The support 3 also rotatably supports a fan unit 5, which will be described later. As shown in FIG. 1, the support 3 has a right support 3R and a left support 3L. The right support 3R is connected to the right end of the frame 25 of the base 2. The left support 3L is connected to the left end of the frame 25 of the base 2. The right support 3R and the left support 3L face each other and are spaced apart in the left-right direction.

[0023] The right support 3R has a second right housing 31A and a third right housing 31B. The second right housing 31A and the third right housing 31B are each shaped like a rectangular parallelepiped that is long in the vertical direction. The third right housing 31B extends upward from the right end of the frame 25 of the base 2. The length of the second right housing 31A in the front-rear direction and the left-right direction is shorter than that of the third right housing 31B. As shown in FIG. 5, the length of the second right housing 31A and the third right housing 31B in the vertical direction is approximately the same. The upper end portion of the second right housing 31A protrudes upward from the upper end portion of the third right housing 31B. The portion of the second right housing 31A other than the upper end portion is disposed inside the third right housing 31B. The left side wall of the third right housing 31B is called the third right support wall 312.

[0024] The second right housing 31A is movable in the vertical direction relative to the third right housing 31B. A handle is provided on a portion of the second right housing 31A that protrudes above the third right housing 31B, for a user to grasp and move the second right housing 31A in the vertical direction.

[0025] As shown in Fig. 7, a third gear 41, a fourth gear 42, a second motor 43, and a second sensor 44 are provided inside the second right housing 31A. The third gear 41 is a spur gear. A virtual first axis C1 extending along the rotation center of the third gear 41 extends horizontally along the left-right direction. The first axis C1 is perpendicular to the third axis C3 (see Fig. 2). The position of the first axis C1 moves vertically in response to the vertical movement of the second right housing 31A relative to the third right housing 31B.

[0026] As shown in FIG. 10, a right protrusion 57R extending rightward from a fan unit 5 (described later) is connected to a portion of the left surface of the third gear 41 that intersects with the first axis C1. The right protrusion 57R is inserted into a substantially circular right through-hole 310 provided in a second right support wall 311, which is the left side wall of the second right housing 31A. The first axis C1 passes through the center of the right through-hole 310. As shown in FIG. 7, a step 41A extending in a substantially circular shape centered on the first axis C1 is formed on the right surface of the third gear 41. A portion of the step 41A is cut out.

[0027] The fourth gear 42 is provided below the third gear 41. The center of rotation of the fourth gear 42 extends horizontally along the left-right direction. The fourth gear 42 is a two-stage gear in which two gears of different diameters are connected in the left-right direction. Of the two gears, the left gear has a larger diameter than the right gear. The left gear of the fourth gear 42 meshes with the third gear 41. The fourth gear 42 is rotatably supported on the right surface of the second right support wall 311 of the second right housing 31A.

[0028] The second motor 43 is located to the right of the fourth gear 42. The second motor 43 is fixed at a position slightly separated to the right from the second right support wall 311. The rotation shaft of the second motor 43 extends to the left. A gear provided on the rotation shaft of the second motor 43 meshes with the right gear of the fourth gear 42. Due to the rotation of the second motor 43, the third gear 41 rotates about the first axis C1 relative to the second right housing 31A.

[0029] The second sensor 44 is located to the right of the third gear 41. The second sensor 44 is capable of detecting the position of the step 41A provided in the third gear 41 where the notch is formed.

[0030] As shown in Fig. 5, the left support body 3L has a second left housing 32A and a third left housing 32B. The third left housing 32B extends upward from the left end of the frame body 25 of the base body 2. The second left housing 32A is vertically movable relative to the third left housing 32B. An operation panel 36 is provided on the left surface of the second left housing 32A. The left side wall of the third left housing 32B is referred to as a third left support wall 322.

[0031] 8 and 10, a substantially circular left through-hole 320 is formed in a second left support wall 321, which is a right side wall of the second left housing 32A. The first axis C1 passes through the center of the left through-hole 320. A left protrusion 57L extending leftward from a fan unit 5, which will be described later, is inserted into the left through-hole 320.

[0032] As shown in FIG. 8 and FIG. 9, the second left support wall 321 is provided with a long and narrow plate-like restricting plate 35. The restricting plate 35 has a first portion 35A, a second portion 35B, a third portion 35C, and a fourth portion 35D. The first portion 35A extends linearly upward from a position near the front end of the second left support wall 321 and below the left through hole 320. The second portion 35B extends rearward while curving from the upper end of the first portion 35A. The third portion 35C extends rearward, downward, and forward from the rear end of the second portion 35B while curving. The fourth portion 35D extends downward while curving from the front end of the third portion 35C. The rear end of the fourth portion 35D is located rearward and near the first portion 35A. The restricting plate 35 covers the periphery of the left protruding portion 57L.

[0033] 9, a cable 58 for supplying power to the fan 6 and a guide portion 59 are connected to the left protruding portion 57L. The guide portion 59 is shaped like a long, thin plate and is flexible. One end portion 59A of the guide portion 59 is connected to the left protruding portion 57L. The other end portion 59B of the guide portion 59 is connected to the second left support wall 321 of the second left housing 32A in the vicinity of the lower ends of the first portion 35A and the fourth portion 35D of the regulating plate 35.

[0034] The guide portion 59 extends from the rear end of the left protruding portion 57L, curves downward, extends forward along the third portion 35C of the regulating plate 35, curves downward, and extends downward along the fourth portion 35D. The downward movement of the guide portion 59 is regulated by the third portion 35C and the fourth portion 35D of the regulating plate 35. The cable 58 extends downward, forward, and downward along the guide portion 59 from the connection portion with the left protruding portion 57L. The cable 58 is disposed along the guide portion 59. The cable 58 is located between the first portion 35A and the second portion 35B of the regulating plate 35 and the guide portion 59.

[0035] <Fan unit 5> The fan unit 5 draws air inward to remove the objects to be removed, and then blows the air from which the objects to be removed have been removed to the outside. In this way, the air purifier 1 purifies the surrounding air. The fan unit 5 is rotatably supported by the support 3. The fan unit 5 has a first housing 50 (see Figs. 1 to 3), a fan 6 (see Figs. 10, 11, and 13), a first filter 7 (see Figs. 5, 10, and 12), and a second filter 8 (see Figs. 5 and 12).

[0036] <First housing 50> 1 to 3, the first housing 50 has a rectangular parallelepiped shape. The orientation of the first housing 50 changes as the fan unit 5 rotates relative to the support 3. In the following, unless otherwise specified, the directions of each component (front-rear, left-right, and vertical directions) will be described based on a state in which the longitudinal direction of the first housing 50 is aligned with the vertical direction (the state in FIG. 1).

[0037] The first housing 50 has an upper wall surface 50U, a lower wall surface 50B, a front wall surface 50F, a rear wall surface 50S, a right wall surface 50R, and a left wall surface 50L. The upper wall surface 50U and the lower wall surface 50B are perpendicular to the vertical direction. The front wall surface 50F and the rear wall surface 50S are perpendicular to the front-rear direction. The right wall surface 50R and the left wall surface 50L are perpendicular to the left-right direction.

[0038] The first housing 50 has an upper housing 501 and a lower housing 502. The upper housing 501 includes an upper wall surface 50U of the first housing 50, and upper portions of the front wall surface 50F, the rear wall surface 50S, the right wall surface 50R, and the left wall surface 50L. The lower housing 502 includes a lower wall surface 50B of the first housing 50, and lower portions of the front wall surface 50F, the rear wall surface 50S, the right wall surface 50R, and the left wall surface 50L. The vertical length of the upper housing 501 is approximately 1 / 2 the vertical length of the lower housing 502.

[0039] The front, rear, right, and left walls of the upper housing 501 are referred to as a first front wall 51F, a first right wall 51R, a first left wall 51L, and a first rear wall 51S. The upper wall of the upper housing 501 is an upper wall 50U. The front, rear, right, and left walls of the lower housing 502 are referred to as a second front wall 52F, a second right wall 52R, a second left wall 52L, and a second rear wall 52S. The lower wall of the upper housing 501 is a lower wall 50B.

[0040] A first housing section 510 (see FIGS. 5, 10, and 11) for housing a first filter 7 and a second filter 8 (see FIGS. 5 and 12) described later is formed inside upper housing 501. A second housing section 520 (see FIGS. 5, 10, and 11) for housing a fan 6 (see FIGS. 11 and 13) described later is formed inside lower housing 502.

[0041] As shown in FIG. 11, the first housing portion 510 is provided with a first housing body 141, a second housing body 142, and a third housing body 143 for supporting a first filter 7 described below from below. The first housing body 141, the second housing body 142, and the third housing body 143 have a plate shape. The first housing body 141, the second housing body 142, and the third housing body 143 are bridged between the upper ends of the second front wall surface 52F and the second rear wall surface 52S (see FIG. 1) of the lower housing 502. The first housing body 141 is connected to the center parts in the left-right direction of the upper ends of the second front wall surface 52F and the second rear wall surface 52S. The second housing body 142 is connected to the vicinity of the right end of the upper ends of the second front wall surface 52F and the second rear wall surface 52S. The third container 143 is connected to the second front wall surface 52F and the second rear wall surface 52S near the left end of the upper end portions thereof.

[0042] 5, the first housing section 510 is provided with a fourth housing body 144 for supporting the first filter 7 from the front, and a fifth housing body 145 for supporting the first filter 7 from the rear. The fourth housing body 144 and the fifth housing body 145 have a plate shape. The fourth housing body 144 is fixed to the rear of a first front wall surface 51F (see FIG. 1) of the upper housing 501. The fifth housing body 145 is fixed to the front of a first rear wall surface 51S (see FIG. 1) of the upper housing 501.

[0043] A first holding portion 15A and a second holding portion 15B are provided at the upper end of the fourth housing 144. The first holding portion 15A is provided to the right of the center in the left-right direction of the fourth housing 144. The second holding portion 15B is provided to the left of the center in the left-right direction of the fourth housing 144. A third holding portion 16A and a fourth holding portion 16B are provided at the upper end of the fifth housing 145. The third holding portion 16A is provided to the right of the center in the left-right direction of the fifth housing 145. The fourth holding portion 16B is provided to the left of the center in the left-right direction of the fifth housing 145.

[0044] The first holding portion 15A, the second holding portion 15B, the third holding portion 16A, and the fourth holding portion 16B each have a rod shape. One end of the first holding portion 15A and the second holding portion 15B is supported by the fourth housing 144 so as to be rotatable around an axis extending in the vertical direction. The first holding portion 15A and the second holding portion 15B can be switched between a state in which they protrude backward with respect to the fourth housing 144 and a state in which they do not protrude backward by rotation. One end of the third holding portion 16A and the fourth holding portion 16B is supported by the fifth housing 145 so as to be rotatable around an axis extending in the vertical direction. The third holding portion 16A and the fourth holding portion 16B can be switched between a state in which they protrude forward with respect to the fifth housing 145 and a state in which they do not protrude forward by rotation.

[0045] A cylindrical frame 86 is provided in the second housing section 520. The frame 86 extends in the vertical direction. An upper opening 861 at the upper end of the frame 86 communicates with the first housing section 510. A lower opening 862 at the lower end of the frame 86 is located above the lower wall surface 50B (see FIG. 3) of the first housing 50. A lattice-shaped louver 86A (see FIGS. 5 and 11) is interposed between the lower opening 862 of the frame 86 and the lower wall surface 50B.

[0046] As shown in Figs. 2 and 10, a right protruding portion 57R protruding to the right is provided on the second right wall surface 52R of the lower housing 502. The right protruding portion 57R is inserted from the left into a right through-hole 310 provided in the second right support wall 311 (see Fig. 7) of the second right housing 31A of the right support body 3R. The right protruding portion 57R is connected to the third gear 41 inside the second right housing 31A of the right support body 3R. A left protruding portion 57L protruding to the left is provided on the second left wall surface 52L of the lower housing 502. The left protruding portion 57L is inserted from the right into a left through-hole 320 provided in the second left support wall 321 of the second left housing 32A of the left support body 3L.

[0047] The first housing 50 is disposed inside the right support body 3R and the left support body 3L in the left-right direction. The first housing 50 is supported by the right support body 3R and the left support body 3L so as to be rotatable about a first axis C1. The first axis C1 is disposed at a point where a resultant force equivalent to the action of gravity acting on each part of the fan unit 5 acts, that is, at a position passing through the center of gravity G. The center of gravity G of the fan unit 5 is located approximately at the center of the first housing 50 in the up-down, left-right, and vertical directions.

[0048] As shown in FIG. 1, a first suction port 55 is provided on the upper wall surface 50U of the first housing 50. As shown in FIG. 1 and FIG. 2, a second right suction port 56R is provided on the right wall surface 50R of the first housing 50, more specifically, on the first right wall surface 51R of the upper housing 501. As shown in FIG. 2 and FIG. 3, a second left suction port 56L is provided on the left wall surface 50L of the first housing 50, more specifically, on the first left wall surface 51L of the upper housing 501. The front wall surface 50F of the first housing 50, more specifically, the first front wall surface 51U of the upper housing 501, and the rear wall surface 50S of the first housing 50, more specifically, the first rear wall surface 51S of the upper housing 501, are all closed, and no suction port is provided. As shown in FIG. 3, an outlet 57 is provided on the lower wall surface 50B of the first housing 50.

[0049] The first suction port 55 and the outlet port 57 include a plurality of through holes formed by gaps between a plurality of blades. The second right suction port 56R and the second left suction port 56L include a plurality of through holes penetrating the first right wall surface 51R or the first right wall surface 51R of the upper housing 501. The first suction port 55, the second right suction port 56R, and the second left suction port 56L are suction ports that draw air from outside the first housing 50 into the inside. The outlet port 57 is an outlet that blows air from inside the first housing 50 to the outside.

[0050] A virtual second axis C2 is defined, which extends in a direction perpendicular to the upper wall surface 50U of the first housing 50 on which the first suction port 55 is provided. The lower wall surface 50B of the first housing 50 on which the air outlet 57 is provided intersects with the second axis C2. The second axis C2 is also perpendicular to the first axis C1 passing through the center of rotation of the first housing 50. As shown in FIG. 2, the second axis C2 passing through the center of the upper wall surface 50U is particularly referred to as the "second axis C20". In a state in which the longitudinal direction of the first housing 50 is aligned vertically, the second axis C20 and the third axis C3 corresponding to the center of rotation of the base 21 of the base 2 are aligned in a straight line in the vertical direction. The right wall surface 50R of the first housing 50 on which the second right suction port 56R is provided, and the left wall surface 50L of the first housing 50 on which the second left suction port 56L is provided intersect with the first axis C1.

[0051] <First filter 7> As shown in FIG. 5, the first filter 7 is accommodated in a first accommodation section 510 surrounded by an upper housing 501 (see FIG. 1). The first filter 7 is a HEPA (High Efficiency Particulate Air) filter. The first filter 7 removes objects to be removed from the air sucked in through the first suction port 55, the second right suction port 56R, and the second left suction port 56L, and purifies the air. As shown in FIG. 12, the first filter 7 has a right filter 7A and a left filter 7B. The right filter 7A and the left filter 7B have the same shape.

[0052] The right filter 7A has a shape in which mountain folds and valley folds are repeatedly formed on a thick plate-like filter substrate, i.e., a bellows-fold shape. The folds of the right filter 7A extend in the front-rear direction. The right filter 7A has a first portion 71A and second portions 72A and 73A. The first portion 71A has a shape curved upwardly convexly when viewed from the front. The second portion 72A extends linearly downward from the right end portion of the first portion 71A. The second portion 73A extends linearly downward from the left end portion of the first portion 71A.

[0053] The left filter 7B has a first portion 71B and second portions 72B and 73B. The first portion 71B and the second portions 72B and 73B correspond to the first portion 71A and the second portions 72A and 73A, respectively, of the right filter 7A.

[0054] The right filter 7A and the left filter 7B are aligned in the left-right direction. The right filter 7A is located to the right of the left filter 7B. As shown in FIG. 10, the first part 71A of the right filter 7A and the first part 71B of the left filter 7B are located below the upper wall surface 50U of the first housing 50 on which the first suction port 55 is provided, in the first storage section 510, and face the upper wall surface 50U. The second part 72A of the right filter 7A is located to the left of the right wall surface 50R of the first housing 50 on which the second right suction port 56R is provided, more specifically, the first right wall surface 51R of the upper housing 501, in the first storage section 510, and face the first right wall surface 51R. The second part 73B of the left filter 7B is located within the first accommodating section 510, on the left wall surface 50L of the first housing 50 on which the second left suction port 56L is provided, more specifically, to the right of the first left wall surface 51L of the upper housing 501, and faces the first left wall surface 51L.

[0055] Second portion 73A of right filter 7A is located to the right of second portion 72B of left filter 7B. Second portions 73A and 72B face each other in the left-right direction.

[0056] As shown in FIG. 12, a first lower elastic body 74A is joined to the lower end of each of the second parts 72A and 73A of the right filter 7A. A second lower elastic body 74B is provided to the lower end of each of the second parts 72B and 73B of the left filter 7B. A first front elastic body 75A is provided to the front end of the first part 71A and the second parts 72A and 73A of the right filter 7A. A first rear elastic body 76A is provided to the rear end of the first part 71A and the second parts 72A and 73A of the right filter 7A. A second front elastic body 75B is provided to the front end of the first part 71B and the second parts 72B and 73B of the left filter 7B. A second rear elastic body 76B is provided to the rear end of the first part 71B and the second parts 72B and 73B of the left filter 7B. The first lower elastic body 74A, the second lower elastic body 74B, the first front elastic body 75A, the second front elastic body 75B, the first rear elastic body 76A, and the second rear elastic body 76B each have a rod shape and extend along the right filter 7A or the left filter 7B. The first lower elastic body 74A, the second lower elastic body 74B, the first front elastic body 75A, the second front elastic body 75B, the first rear elastic body 76A, and the second rear elastic body 76B are elastically deformable sponges.

[0057] The first filter 7 is placed in the first housing 141, the second housing 142, and the third housing 143 shown in FIG. 11 while being housed in the first housing section 510. The second portion 72A of the right filter 7A is located above the second housing 142. The second portion 73A of the right filter 7A and the second portion 72B of the left filter 7B are located above the first housing 141. The second portion 73B of the left filter 7B is located above the third housing 143. The first lower elastic body 74A and the second lower elastic body 74B are interposed between the first filter 7 and the first housing 141, the second housing 142, and the third housing 143. The first lower elastic body 74A and the second lower elastic body 74B elastically deform to fill the gaps between the first filter 7 and the first housing 141, the second housing 142, and the third housing 143.

[0058] The first filter 7, when housed in the first housing portion 510, is sandwiched in the front-rear direction by the fourth housing body 144 and the fifth housing body 145 shown in FIG. 5. The front end of the first filter 7 is located behind the fourth housing body 144. The rear end of the first filter 7 is located in front of the fifth housing body 145. The first front elastic body 75A and the second front elastic body 75B (see FIG. 12) are interposed between the first filter 7 and the fourth housing body 144. The first rear elastic body 76A and the second rear elastic body 76B (see FIG. 12) are interposed between the first filter 7 and the fifth housing body 145. The first front elastic body 75A, the second front elastic body 75B, the first rear elastic body 76A, and the second rear elastic body 76B elastically deform to fill the gaps between the first filter 7 and the fourth housing body 144 and the fifth housing body 145.

[0059] The first retaining portion 15A and the third retaining portion 16A contact from above both front-to-rear end portions of the first portion 71A of the right filter 7A when it is housed in the first housing portion 510. The second retaining portion 15B and the fourth retaining portion 16B contact from above both front-to-rear end portions of the first portion 71B of the left filter 7B when it is housed in the first housing portion 510. In this way, the first retaining portion 15A, the second retaining portion 15B, the third retaining portion 16A, and the fourth retaining portion 16B hold the first filter 7 from above.

[0060] <Second filter 8> The second filter 8 is a pre-filter. The second filter 8 removes coarse dust from among the objects to be removed in the air sucked in through the first suction port 55, the second right suction port 56R, and the second left suction port 56L, upstream of the first filter 7. As shown in Fig. 12, the second filter 8 has an upper cover portion 8U, a right cover portion 8R, and a left cover portion 8L.

[0061] The upper covering portion 8U is located above the first filter 7. The right covering portion 8R curves downward and extends downward from the right end portion of the upper covering portion 8U. The right covering portion 8R is located to the right of the right filter 7A of the first filter 7. The left covering portion 8L curves downward and extends downward from the left end portion of the upper covering portion 8U. The left covering portion 8L is located to the left of the left filter 7B of the first filter 7.

[0062] As shown in FIG. 10, the upper cover portion 8U of the second filter 8 is located below the upper wall surface 50U of the first housing 50 on which the first suction port 55 is provided. The right cover portion 8R of the second filter 8 is located on the upper wall surface 50U of the first housing 50 on which the second right suction port 56R is provided, more specifically, on the left side of the first right wall surface 51R of the upper housing 501. The left cover portion 8L of the second filter 8 is located on the left wall surface 50L of the first housing 50 on which the second left suction port 56L is provided, more specifically, on the right side of the first left wall surface 51L of the upper housing 501. The second filter 8 is interposed between the first filter 7 and the upper housing 501 in a state in which the first filter 7 is accommodated in the first accommodation portion 510 of the upper housing 501.

[0063] <Fan 6> As shown in FIG. 11, the fan 6 is accommodated in the second accommodation section 520 surrounded by the lower housing 502, and is disposed in the frame 86 shown in FIG. 5. The fan 6 is a so-called counter-rotating axial flow fan. As shown in FIG. 13, the fan 6 has a propeller shaft 6A, a first propeller 6B, and a second propeller 6C. The propeller shaft 6A has a cylindrical shape. The center of the propeller shaft 6A extends along the second axis C20. The first propeller 6B is provided at the upper end of the propeller shaft 6A. The first propeller 6B has a plurality of first blades 61. The diameter of the first propeller 6B corresponds to the radial length between the second axis C20 and the tips of the plurality of first blades 61. The second propeller 6C is provided at the lower end of the propeller shaft 6A. The second propeller 6C has a plurality of second blades 62. The diameter of the second propeller 6C corresponds to the radial length between the second shaft C20 and the tips of the second blades 62. The diameter of the second propeller 6C is larger than the diameter of the first propeller 6B. The number of the second blades 62 of the second propeller 6C is greater than the number of the first blades 61 of the first propeller 6B.

[0064] The fan 6 is provided with a motor (not shown), and power is supplied to the motor via a cable 58 connected to the left protruding portion 57L of the first housing 50, so that the fan 6 is driven to rotate. When the fan 6 is driven, the first propeller 6B rotates in a first rotation direction D1 at a first rotation speed V1. The second propeller 6C rotates in a second rotation direction D2 at a second rotation speed V2. The first rotation direction D1 is a clockwise direction when the fan 6 is viewed from above. The second rotation direction D2 is a counterclockwise direction when the fan 6 is viewed from above. The first rotation direction D1 is opposite to the second rotation direction D2. The first rotation speed V1 is, for example, 1000 rpm. The second rotation speed V2 is, for example, 800 rpm. The second rotation speed V2 is smaller than the first rotation speed V1.

[0065] When the fan 6 rotates, air flows inside the frame 86. The direction in which the air flows is parallel to a virtual second axis C2 extending in a direction perpendicular to the upper wall surface 50U of the first housing 50 and coincides with a direction from the first suction port 55 of the upper wall surface 50U toward the fan 6. Hereinafter, the direction parallel to the second axis C2 and from the first suction port 55 toward the fan 6 is referred to as a "specific direction D." As shown in FIG. 3, the direction from the first suction port 55 of the upper wall surface 50U toward the fan 6 along the second axis C2 (second axis C20) passing through the center of the upper wall surface 50U is particularly referred to as a "specific direction D0."

[0066] An air flow in a specific direction D is generated inside the frame 86, and thus air is sucked in through the first suction port 55, the second right suction port 56R, and the second left suction port 56L. The sucked in air is blown out through the outlet 57.

[0067] A state in which the angle of the fan unit 5 is adjusted so that the entire first suction port 55 is positioned vertically above the fan 6 is referred to as a "predetermined state." FIG. 14 shows some specific examples of the predetermined state when the vertical position of the fan unit 5 and the rotation state of the fan unit 5 change. In the predetermined state, the first suction port 55 is located at the most upstream position in the specific direction D. In the predetermined state, the upstream of the first suction port 55 in the specific direction D is open. In the predetermined state, no other components of the air purifier 1 are provided upstream of the first suction port 55 in the specific direction D.

[0068] <Operation Overview (Horizontal movement of air purifier 1)> The user rotates the adjusters 241-244 so that the lower ends of the adjusters 241-244 shown in FIG. 3 are positioned above the casters 231-234. In this state, when the user applies a force in the front-rear direction to the air purifier 1, the wheels of the casters 231-234 rotate, and the air purifier 1 moves in the front-rear direction. Next, the user rotates the adjusters 241-244 so that the lower ends of the adjusters 241-244 are positioned below the casters 231-234. The casters 231-234 move upward away from the placement surface. As a result, the adjusters 241-244 support the base 21 so that it cannot move relative to the placement surface.

[0069] <Operation overview (up and down movement of fan unit 5, angle adjustment)> A user grasps the handles of the second right housing 31A and the second left housing 32A of the support body 3 and moves them vertically. As a result, the fan unit 5 supported by the support body 3 moves vertically.

[0070] When the user inputs an operation to rotate the air purifier 1 about the third axis C3 to the operation panel 36, the first motor 250 (see FIG. 5) is driven. The rotation of the first motor 250 causes the base 21 of the base 2, the support 3, and the fan unit 5 to rotate about the third axis C3. This allows the user to adjust the angle of the fan unit 5 about the third axis C3.

[0071] As the base 21 rotates, the position where the notch is formed in the plate body 17 (see FIG. 5) is detected by the first sensor 251. The rotation of the first motor 250 stops when the notch of the plate body 17 is detected by the first sensor 251. This prevents the fan unit 5 from continuously rotating 360 degrees or more around the third axis C3.

[0072] When the user inputs an operation to rotate the air purifier 1 around the first axis C1 to the operation panel 36, the second motor 43 (see FIG. 7) is driven. The rotation of the second motor 43 causes the fan unit 5 to rotate around the first axis C1. This allows the user to adjust the angle of the fan unit 5 around the first axis C1. Note that as the angle of the fan unit 5 around the first axis C1 is changed, the specific direction D is also changed with respect to the vertical direction. Therefore, the direction in which the first suction port 55 of the air purifier 1 faces also changes in response to the adjustment of the angle of the fan unit 5 around the first axis C1.

[0073] As the fan unit 5 rotates about the first axis C1, the left protruding portion 57L rotates from the state shown in FIG. 9 to, for example, the state shown in FIG. 14. As shown in FIG. 14, the guide portion 59 extends upward from the front end of the left protruding portion 57L, curves below the second portion 35B of the regulating plate 35, and extends downward behind the first portion 35A. The cable 58 extends upward and downward from the connection portion with the left protruding portion 57L along the guide portion 59. The cable 58 is arranged along the guide portion 59. The cable 58 is located between the first portion 35A and the second portion 35B of the regulating plate 35 and the guide portion 59.

[0074] 15, in a state where the longitudinal direction of the first housing 50 of the fan unit 5 is aligned along the vertical direction and the fan unit 5 is arranged so that the specific directions D and D0 are vertically downward, the second axis C20 and the third axis C3 are aligned in a straight line in the vertical direction, and the first filter 7 is located above the fan 6 in the vertical direction. In this state, the height from the mounting surface to the lowest portion of the first suction port 55 is always 500 mm or more, regardless of the vertical position of the fan unit 5. In addition, the height from the mounting surface to the highest portion of the first suction port 55 is always 850 mm or less, regardless of the vertical position of the fan unit 5.

[0075] <Operation overview (air purification)> When the user inputs an operation to drive the air purifier 1 via the operation panel 36, the supply of power to the fan 6 is started. The first propeller 6B and the second propeller 6C of the fan 6 rotate. The fan 6 draws in air from the first suction port 55, the second right suction port 56R, and the second left suction port 56L. The arrow Y1 in FIG. 15 indicates the flow of air drawn into the first suction port 55. The drawn-in air passes through the first filter 7 and the second filter 8, thereby removing the objects to be removed from the air. The fan 6 blows the purified air toward the outlet 57 via the frame 86. The purified air is blown out from the outlet 57 toward the flow straightener 26 between the third right support wall 312 and the third left support wall 322. The flow straightener 26 changes the flow direction of the air blown out from the outlet 57 to the horizontal direction, and blows the air horizontally. The airflow in the left-right direction is suppressed by the third right support wall 312 and the third left support wall 322. Therefore, the air blown out from the outlet 57 toward the flow straightener 26 flows forward or backward from the flow straightener 26. The arrow Y2 in Fig. 15 indicates the airflow toward the front. The arrow Y3 in Fig. 15 indicates the airflow toward the rear.

[0076] <Actions and Effects of the Present Embodiment> In a predetermined state, the first suction port 55 of the air purifier 1 is located at the most upstream position of the air purifier 1 in the specific direction D. Therefore, the flow of air sucked toward the first suction port 55 is not obstructed by other components of the air purifier 1. Therefore, the air purifier 1 can stably maintain the efficiency of purifying the air with the first filter 7 and the second filter 8 of the fan unit 5 regardless of the direction in which the first suction port 55 faces.

[0077] The fan 6 has a first propeller 6B and a second propeller 6C that rotate in opposite directions. In this case, the force of sucking air through the first suction port 55, the second right suction port 56R, and the second left suction port 56L can be made larger than when the fan 6 has only one propeller. Also, the second rotation speed V2 of the second propeller 6C is smaller than the first rotation speed V1 of the first propeller 6B. In this case, the force of sucking air through the first suction port 55 can be made larger than when the rotation speeds of the first propeller 6B and the second propeller 6C are the same.

[0078] When the fan unit 5 is arranged so that the specific directions D and D0 are vertically downward, the height from the surface on which the air purifier 1 is placed to the first suction port 55 is 500 mm or more and 850 mm or less. In this case, droplets emitted from a person's mouth can be efficiently sucked in through the first suction port 55.

[0079] The air purifier 1 includes a flow straightener 26 below the fan unit 5 in the vertical direction. A top portion 26A of the flow straightener 26 is located at the uppermost position in the vertical direction. The inclined portion 26B of the flow straightener 26 extends downward from the top portion 26A at an incline with respect to the vertical direction. The flow straightener 26 smoothly changes the flow direction of the air blown out from the air outlet 57 from a downward direction to a horizontal direction, and allows the air to flow horizontally.

[0080] The first filter 7 has first portions 71A and 71B facing the upper wall surface 50U, a second portion 72B facing the first right wall surface 51R, and a second portion 73B facing the first left wall surface 51L. A first suction port 55 is provided in the upper wall surface 50U. A second right suction port 56R is provided in the first right wall surface 51R. A second left suction port 56L is provided in the first left wall surface 51L. Therefore, the first filter 7 can efficiently purify the air by ensuring a large surface area.

[0081] In the air purifier 1, the first lower elastic body 74A, the second lower elastic body 74B, the first front elastic body 75A, the second front elastic body 75B, the first rear elastic body 76A, and the second rear elastic body 76B can prevent gaps from being formed between the first housing 141, the second housing 142, the third housing 143, the fourth housing 144, and the fifth housing 145 and the first filter 7. In this case, air can be prevented from leaking from the gaps between the first housing 141, the second housing 142, the third housing 143, the fourth housing 144, and the fifth housing 145 and the first filter 7, so that the efficiency of purifying the air by the first filter 7 can be maintained.

[0082] The first holding portion 15A, the second holding portion 15B, the third holding portion 16A, and the fourth holding portion 16B can press the first filter 7 against the first housing body 141, the second housing body 142, and the third housing body 143 in the specific direction D, and can bring the first filter 7 into close contact with the first housing body 141, the second housing body 142, and the third housing body 143. In this case, it is possible to prevent air from leaking from gaps between the first housing body 141, the second housing body 142, and the third housing body 143 and the first filter 7 and the housings, and therefore it is possible to maintain the efficiency of purifying the air with the first filter 7.

[0083] The first filter 7 is a HEPA (High Efficiency Particulate Air) filter. A HEPA filter is a high-performance particulate air filter used to remove dirt, dust, and the like from the air. As a HEPA filter, an air filter having a collection efficiency of ISO35 class as defined by ISO29463-1:2011 is used. The second filter 8 is a pre-filter. The second filter 8 can suppress clogging of the first filter 7, and therefore can maintain a good cleaning effect for a long time.

[0084] The first axis C1 corresponding to the center of rotation of the fan unit 5 is disposed at a position passing through the center of gravity G of the fan unit 5. In this case, the user can easily rotate the fan unit 5 around the first axis C1.

[0085] The cable 58 in the second left housing 32A is arranged along the guide portion 59 inside the restriction plate 35. The guide portion 59 can prevent the cable 58 from moving within the space in response to the rotation of the fan unit 5 and becoming entangled.

[0086] The air drawn into the fan unit 5 flows toward the second right suction port 56R and the second left suction port 56L along the left-right direction. On the other hand, the air cleaned by the fan unit 5 is blown out through the outlet 57 toward between the third right support wall 312 and the third left support wall 322, and flows along the front-rear direction. That is, the movement direction (left-right direction) of the air drawn into the second right suction port 56R and the second left suction port 56L intersects with the movement direction (front-rear direction) of the air blown out from the outlet 57. Note that no air suction port is provided on the first front wall surface 51F and the first rear wall surface 51S of the upper housing 501. For this reason, air is unlikely to move forward or backward toward the upper housing 501.

[0087] In this case, it is possible to prevent the intake of air from the second right suction port 56R and the second left suction port 56L from being hindered by the flow of air blown out from the air outlet 57. Therefore, the air purifier 1 can efficiently draw in and purify air, and can stably maintain the efficiency of purifying air.

[0088] The air purifier 1 is capable of rotating the support 3 and the fan unit 5 about the third axis C3. Therefore, the air purifier 1 can suck in and purify air over a wide area in the rotational direction centered on the vertical direction.

[0089] <Modification> The present invention is not limited to the above embodiment, and various modifications are possible. The air purifier 1 may purify the air by using another cleaning member instead of the first filter 7 and the second filter 8. For example, the air purifier 1 may be equipped with a UV sterilization device that purifies the air by irradiating ultraviolet rays. Also, for example, the air purifier 1 may purify the air by using a photocatalyst.

[0090] The shapes and sizes of the first propeller 6B and the second propeller 6C of the fan 6 are not limited to those in the above embodiment. For example, the number of the second blades 62 of the second propeller 6C may be smaller than the number of the first blades 61 of the first propeller 6B. The diameter of the second propeller 6C may be smaller than the diameter of the first propeller 6B. The first propeller 6B and the second propeller 6C may have the same shape.

[0091] The relationship between the rotational speeds of the first propeller 6B and the second propeller 6C is not limited to the above embodiment. For example, the second rotational speed V2 of the second propeller 6C may be greater than the first rotational speed V1 of the first propeller 6B. The first rotational speed V1 and the second rotational speed V2 may be the same.

[0092] The fan 6 may be an axial fan having only one propeller. The fan 6 is not limited to an axial fan, and may be a centrifugal fan or a blower fan.

[0093] In a given state, the height from the placement surface on which the air purifier 1 is placed to the first suction port 55 is not limited to that in the above embodiment. Therefore, the height from the placement surface to the first suction port 55 may be less than 500 mm or greater than 850 mm.

[0094] The shape of the flow regulator 26 is not limited to the above embodiment. For example, the flow regulator 26 may be conical or frustum-shaped. Also, for example, the flow regulator 26 may have an apex 26A extending linearly in the left-right direction and an inclined portion 26B extending downward from the apex 26A at an incline forward or backward. The inclined portion 26B of the flow regulator 26 may extend downward while curving. The air purifier 1 may not have the flow regulator 26, and a horizontally extending plate may be provided instead.

[0095] The first filter 7 may have only one filter, without having the right filter 7A and the left filter 7B. The shape of the first filter 7 is not limited to the above embodiment, and may have another shape. For example, the first filter 7 may be a flat filter that is directly attached to the inside of each of the upper wall surface 50U where the first suction port 55 is provided, the first right wall surface 51R where the second right suction port 56R is provided, and the first left wall surface 51L where the second left suction port 56L is provided.

[0096] The first filter 7 may be directly bonded to the first housing 141, the second housing 142, the third housing 143, the fourth housing 144, and the fifth housing 145. In this case, the first filter 7 does not need to be provided with an elastic body or a holding portion.

[0097] The air purifier 1 may have a first filter 7 and a second filter 8 downstream of the fan 6 in the specific direction D. In this case, the second filter 8 may be interposed between the fan 6 and the first filter 7. The air purifier 1 may have only the first filter 7 and not the second filter 8.

[0098] The first axis C1 corresponding to the center of rotation of the fan unit 5 does not have to be disposed at a position passing through the center of gravity G of the fan unit 5. For example, the first axis C1 may pass through a position at the vertical center and the front-rear center of the first housing 50. A slip ring may be provided instead of the cable 58. Electricity for driving the fan 6 may be supplied via the slip ring. In this case, the induction unit 59 may not be provided.

[0099] The second suction port may also be provided in the first front wall surface 51F and the first rear wall surface 51S of the upper housing 501. The second suction port may be provided only in the first front wall surface 51F and the first rear wall surface 51S of the upper housing 501, and the second right suction port 56R and the second left suction port 56L may not be provided. The first housing 50 may have only the first suction port 55, and may not have a second suction port.

[0100] The air purifier 1 may rotate the fan unit 5 back and forth about the third axis C3 by alternately switching the rotation direction of the first motor 250. In this case, the air purifier 1 may reverse the rotation direction of the first motor 250 every time the first sensor 251 detects the notch in the plate body 17.

[0101] The air purifier 1 may rotate the fan unit 5 back and forth about the first axis C1 by alternately switching the rotation direction of the second motor 43. In this case, the air purifier 1 may reverse the rotation direction of the second motor 43 every time the second sensor 44 detects the notch in the step 41A.

[0102] <Other> The first motor 250 is an example of a "rotation mechanism" of the present invention. The second left housing 32A is an example of a "second housing" of the present invention. The upper wall surface 50U is an example of a "first wall surface" of the present invention. The lower wall surface 50B is an example of a "second wall surface" of the present invention. The right wall surface 50R and the left wall surface 50L are an example of a "third wall surface" of the present invention. [Explanation of symbols]

[0103] 1: Air purifier 3:Support 5: Fan unit 6: Fan 6B: 1st propeller 6C: 2nd propeller 7: First filter 8: Second filter 50: First unit 55: First intake port 56L: Second left intake port 56R: 2nd right intake 57: Air outlet 57L: Left protrusion 58: Cable 59:Induction part 71A, 71B: Part 1 72A, 72B, 73A, 73B: Part 2 74A: First lower elastic body 74B: Second lower elastic body 75A: First front elastic body 75B: Second front elastic body 76A: First rear elastic body 76B: Second rear elastic body 141: First containment unit 142: Second Containment Unit 143: Third Containment Unit 144: 4th Containment Unit 145: 5th Containment Unit C1: 1st axis C2, C20: 2nd axis C3: 3rd axis D, D0: Specific direction

Claims

1. a first housing having a first wall surface on which a first suction port that is an air intake port is provided and a second wall surface on which an air outlet port is provided; a fan unit provided inside the first housing, the fan unit including at least a fan that draws in air from the first suction port and a cleaning member that cleans the air; a support that supports the fan unit rotatably about a virtual first axis that extends in a horizontal direction; An air purifier comprising: the first wall surface is disposed at a position intersecting a virtual second axis perpendicular to the first axis, When a direction parallel to the second axis and from the first wall surface toward the fan is defined as a specific direction, The first suction port is located at the most upstream of the air purifier in the specific direction, with the entire first suction port being located vertically above the fan. An air purifier characterized by:

2. The fan is a first propeller rotating in a first rotational direction about the second shaft; a second propeller provided downstream of the first propeller in the specific direction and rotating about the second axis in a second rotation direction that is opposite to the first rotation direction; The air purifier according to claim 1 , further comprising:

3. 3. The air purifier according to claim 2, wherein the rotation speed of the second propeller is slower than the rotation speed of the first propeller.

4. The air purifier according to claim 1, characterized in that when the fan unit is positioned so that the specific direction is downward in the vertical direction, the height from a surface on which the air purifier is placed to the first intake port is 500 mm or more and 850 mm or less.

5. a flow regulator disposed below the fan unit in the vertical direction, The flow regulator is a top portion located at the topmost position in the vertical direction; an inclined portion extending downward from the top at an angle with respect to the vertical direction; The air purifier according to claim 1 , further comprising:

6. The cleaning member includes a first filter, The first filter is a first portion facing the first wall surface; a second portion extending from an end of the first portion in a direction in which the first axis extends and facing a third wall surface disposed at a position intersecting the first axis of the first housing; The air purifier according to claim 1 , further comprising:

7. A housing that houses the first filter; an elastic body interposed between the first filter and the housing; The air purifier according to claim 6, further comprising:

8. The air purifier according to claim 7, further comprising a holding portion that contacts the first part of the first filter housed in the housing from the upstream side in the specific direction and holds the first filter housed in the housing.

9. the first filter is a HEPA filter; The cleaning member is The first filter; a second filter interposed between the first housing and the first filter; 7. The air purifier according to claim 6, further comprising:

10. 10. The air purifier according to claim 1, wherein the first axis is disposed at a position passing through a center of gravity of the fan unit.

11. The fan unit includes: a protrusion protruding toward the support and connected to a cable for supplying power to the fan; The support is a hole through which the protrusion passes; a second housing that defines a space in which the protrusion, the cable, and a guide portion that guides the cable are housed; and having The induction portion is 10. The air purifier according to claim 1, wherein the air purifier has an elongated plate shape, one end of the air purifier being connected to the protruding portion and the other end of the air purifier being connected to the second housing.

12. a second suction port that is an air suction port and is provided on a third wall surface of the first housing that is disposed at a position intersecting the first axis, The support is a pair of support walls facing each other in a direction extending along the first axis; The fan unit is rotatably supported inside the pair of support walls.

10. The air purifier according to claim 1 ,

13. 10. The air purifier according to claim 1, further comprising a rotation mechanism that rotates the support body about an imaginary third axis that extends in the vertical direction.

Images