Clothing fan and clothing equipped with same

Abstract

To provide a fan structure that suppresses overheat of a motor without impairing cooling function on a garment fan.SOLUTION: A garment fan 10 includes a casing 30 provided with a motor installation part 34 having a rib structure. An opening 52M is formed at a tip surface 52K of a motor housing 50 of the motor installation part 34. A hub 21 of a propeller fan 20 is fitted to a motor 70 so as to cover the opening 52M.SELECTED DRAWING: Figure 6

Description

[Technical field]

[0001] The present invention relates to a clothing fan that is attached to clothing such as work clothes and blows outside air into the clothing. [Background technology]

[0002] A clothing fan is a blower that is attached to the back of clothing, etc., and reduces sweating by sending outside air into the inside of the clothing as the fan rotates. A clothing fan has an axial-flow propeller fan that is arranged coaxially with a motor, and the motor fan is housed in a cylindrical main body (casing). The fan is attached to the clothing by clamping the edge of a mounting hole formed in the clothing to the main body (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Utility Model Registration No. 3213564 Summary of the Invention [Problem to be solved by the invention]

[0004] In recent years, with the demand for increased airflow from clothes fans, batteries with variable output voltage are being used. If the fan is operated for a long time with the battery output voltage increased, the motor will overheat, affecting the operation of the fan.

[0005] Therefore, there is a demand for a fan structure for clothing fans that prevents the motor from overheating without impairing the cooling function. [Means for solving the problem]

[0006] The clothing fan of the present invention is a fan that can be attached to clothing, and includes a propeller fan with multiple blades attached to a hub, and a cylindrical motor housing that houses a motor and is surrounded by the hub, with at least one opening formed in the side surface and / or the tip surface on the propeller fan side of the motor housing, and the opening being covered by the hub. For example, the motor housing is partially surrounded by the hub.

[0007] Air heated inside the motor housing flows through a gap formed between the side surface of the motor housing and the inner circumferential surface of the hub, through the gap, via an opening. Effect of the Invention

[0008] According to the present invention, it is possible to provide a fan structure for a clothes fan that prevents overheating of the motor without impairing the cooling function. [Brief description of the drawings]

[0009] [Figure 1] FIG. 2 is a perspective view of the clothing fan as seen from the intake side. [Diagram 2] FIG. 2 is an exploded perspective view of the clothes fan as viewed from the outlet side. [Diagram 3] FIG. 2 is a side view of the clothing fan. [Figure 4] FIG. [Diagram 5] FIG. 2 is a perspective view of the propeller fan as viewed from the outlet side. [Figure 6] FIG. 2 is an exploded perspective view of the propeller fan and the motor housing as viewed from the intake port side. [Figure 7] FIG. [Figure 8] FIG. 4 is a partially enlarged view of FIG. 3 showing a contact portion between the ring and the flange. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] The clothing fan of this embodiment will now be described with reference to the drawings. Fig. 1 is a perspective view of the clothing fan as viewed from the inlet side. Fig. 2 is an exploded perspective view of the clothing fan as viewed from the outlet side. Fig. 3 is a side view of the clothing fan. The overall configuration of the clothing fan will be described with reference to Figs. 1 to 3.

[0011] Clothing fan 10 is a small air blowing device that can be attached to dedicated clothing 100 (see FIG. 2) and is detachably attached to mounting hole 100R formed on the back side of clothing 100. Clothing fan 10 comprises a propeller-shaped axial flow fan (hereinafter referred to as propeller fan) 20 and a cylindrical casing 30 that houses propeller fan 20, and is attached so that intake port 10I is on the outside of the clothing and exhaust port 10F (see FIG. 2) is on the inside of the clothing.

[0012] The casing 30 is composed of a main body portion 32 and a motor mounting portion 34. As shown in Fig. 2, the motor mounting portion 34 is removably mounted on the main body portion 32 by an engagement portion 34T. The main body portion 32 has an annular portion 36 that forms a flange 32F at the end portion on the suction port 10I side, and the annular portion 36 houses the propeller fan 20. For ease of explanation, the motor is not shown in Fig. 2.

[0013] The intake port 10I of the main body 32 is an opening with a ribbed structure with a flange 32F as an outer frame, and multiple radial ribs 32R1 extend radially from a cylindrical center portion 31, and two annular ribs 32R2 are arranged concentrically while intersecting the radial ribs 32R1.

[0014] The motor mounting part 34 has a cylindrical motor housing 50 with a bottom at the center, a dish-shaped frame body formed by a ribbed structure, and functions as a discharge port 10F (see FIG. 3). The motor housing 50 accommodates a motor (not shown here) such as a brushless motor in its internal space 54B. The ribbed structure of the motor mounting part 34 is structured such that a plurality of radial ribs 34R1 are connected to the annular frame 35 by intersecting concentric annular ribs 34R2. The lid 60 has an engagement piece 60T that can be inserted into an engagement hole 54K of the motor housing 50, and closes the motor housing 50.

[0015] A connection part 55 that protrudes in the radial direction is formed near the opening of motor housing 50. A power cable (neither shown) that connects to a battery is connected to input terminal 54M provided at connection port 55 of motor housing 50. Propeller fan 20 is attached to the output shaft of a motor that is arranged coaxially in casing 30, and rotates when driven by the motor. Clothes fan 10 can be connected to a battery that can change the output voltage, and the output voltage can be adjusted in stages, for example in four stages. Propeller fan 20 sends an amount of air according to the output voltage to outlet 10F.

[0016] The ring 40 is a holding member that holds the garment 100 (the peripheral edge of the mounting hole 100R) between itself and the flange 32F of the main body 32, and is screwed into the annular portion 36 of the main body 32 (see FIG. 2). The ring 40 rotates along the male threads 36M formed on the outer circumferential surface of the annular portion 36, and is rotatable until the flange 40F formed on the discharge port side end of the ring 40 comes into contact with the flange 32F of the main body 32.

[0017] With the ring 40 removed, the user inserts the casing 30 into the mounting hole 100R of the garment 100 from the motor mounting part 34 side. Then, the ring 40 is rotated around the casing 30 from the inside of the garment to tighten it. This causes the garment fan 10 to be attached and fixed to the garment 100. The side surface 32S of the flange 32F of the main body 32 has a smooth wave-shaped shape that makes it easy to grip the flange 32F at once, and does not have any protrusions or edges that could catch fingers.

[0018] The clothing fan 10 of this embodiment is a thin fan (see FIG. 3) with a narrow width along the fan axis E, which is realized by the configuration of the propeller fan 20. The motor housing 50 is configured to prevent the motor from overheating even when the output voltage of the battery is increased. Furthermore, when the ring 40 is tightened around the casing 30, the ring 40 is configured to restrict rotation in the direction that would loosen it. These will be described in detail below.

[0019] First, the configuration of propeller fan 20 will be described with reference to Figures 4 and 5. Figure 4 is a plan view of propeller fan 20 as viewed from suction port 10I (front side). Figure 5 is a perspective view of propeller fan 20 as viewed from discharge port 10F. Axial flow propeller fan 20 is an impeller having eight blades (hereinafter also referred to as vanes as necessary) 20A-20H attached to cylindrical hub 21, and cylindrical protrusion 21T1 is formed at the center of tip end surface 21T2 of hub 21. The central axis of hub 21 coincides with axis E of casing 30 (axis of the motor) (hereinafter the axis of the hub will also be represented by E).

[0020] Clothes fan 10 is a single-stage axial fan with intake port 10I facing forward, and air is sent from intake port 10I to exhaust port 10F (rear side) as hub 21 attached to the output shaft of a motor rotates. The blade profile, including the shapes and mounting angles of blades 20A-20H, is determined to create this flow. Propeller fan 20 rotates clockwise when viewed from exhaust port 10F (rear side).

[0021] The three-dimensional blade shapes and the mounting angle ξ of the eight blades 20A to 20H are the same here. The mounting angle ξ here is defined as an inclination angle with respect to the tip surface 21T2 of the hub 21, i.e., a plane perpendicular to the axis E of the hub 21. For example, in the case of the blade 20B, it is expressed as an inclination angle of a straight line connecting the blade leading edge K1 and the blade trailing edge K2 at the root portion with respect to the side surface 21S of the hub 21. The mounting angle ξ here is defined as an angle larger than 45°, and can be defined as an angle exceeding 50°, for example.

[0022] In this embodiment, eight blades 20A-20H are attached at equal intervals along the circumferential direction to side surface 21S of hub 21. That is, adjacent blades are positioned at an angle α of 45° from the center. Angle α is an angle defined by a plane perpendicular to axis E of hub 21, and for example, angle α between leading edge portions K3, K5 and trailing edge portions K4, K6 corresponding to the outermost (farthest outward) blade edges of blades 20A, 20B is all 45°.

[0023] The eight blades 20A-20H are attached over the entire axial direction of a side surface 21S of the hub 21 (hereinafter also referred to as the hub side surface). That is, the axial width I of the blades 20A-20H at the hub side surface 21S corresponds to the axial length L of the hub side surface 21S. For example, in the case of the blade 20B, the blade leading edge K1 at the root is located near the lower end 21P of the hub 21, and the blade trailing edge K2 is located near the edge 21N of the tip surface 21T2 of the hub 21.

[0024] Furthermore, the leading edges of the eight blades 20A-20H from the root to the radially furthest end (in the case of blade 20B, the blade edge from blade leading edge K1 to blade trailing edge K3) lie along a plane perpendicular to the axis E of hub 21. The same is true for the trailing edges (in the case of blade 20B, the blade edge from blade trailing edge K2 to blade trailing edge K4), and the leading and trailing edges are parallel to each other. Furthermore, each blade has a blade shape with edges at the leading and trailing edges (K3 and K4 in the case of blade 20B).

[0025] On the other hand, when the three-dimensional blade shapes of the blades 20A to 20H are viewed along the radial direction, the blade edges near the leading edge 21N of the hub 21 (blade edges K2 to K4 in the case of blade 20B) are curved to a greater degree than the blade edges near the lower end 21P of the hub 21 (blade edges K1 to K3 in the case of blade 20B), and the curved shape has a more twisted shape closer to the leading edge 21N of the hub 21. Therefore, the chord length of the blade edge farthest outward in the radial direction (corresponding to the length of the straight line connecting K3 and K4 in the case of blade 20B) is longer than the blade chord length near the base relative to the hub 21 (corresponding to the length of the straight line connecting K1 and K2 in the case of blade 20B).

[0026] Also, since the blades 20A to 20H have a twisted blade shape on the tip surface 21T2 side of the hub 21, the inclination angle β of the straight line connecting the leading edge and the trailing edge of the radially outermost blade edge (in the case of the blade 20B, the inclination angle of the straight line connecting K3 and K4 with respect to a plane perpendicular to the hub axis E) is smaller than the mounting angle ξ. Here, the blade curved surface shapes of the blades 20A to 20H are determined so as to be smaller than 45°.

[0027] According to the blade curved surface shapes of the blades 20A to 20H, a space is secured between adjacent blades (see FIG. 4). For example, when a straight line connecting the trailing edge K4 of the blade 20B and the axis E is defined, the straight line does not overlap with the adjacent blade 20A. Here, when the blades 20A to 20H are deployed as a blade cascade, the solidity ratio of the blade cascade (the ratio of the blade chord length to the spacing) is relatively small.

[0028] The spacing (pitch), i.e., the distance between the rear ends of the outermost blade edges of adjacent blades (corresponding to the distance between K4 and K6 in the circumferential direction in the case of blades 20A and 20B), is greater than the chord length (the length of the straight line connecting K3 and K4, and the straight line connecting K5 and K6 in the case of blades 20A and 20B). Note that the spacing and chord length are common technical knowledge for those skilled in the art, so the development diagram of the blade row is omitted.

[0029] In this way, by using a blade shape that ensures space between adjacent blades when viewed from the hub axis direction, even though the fan has eight blades, it is possible to achieve a thin, quiet clothing fan 10 and stable air blowing function when the fan is in operation, as described below.

[0030] Conventionally, an even number of blades was thought to be more likely to cause resonance and produce noise and other adverse effects, so the number of blades was set to an odd number in electric fans, automobile radiator cooling fans, small computer cooling fans, etc. (3, 5 or 7 in the case of electric fans). In other words, the blades are attached at positions offset from the opposing positions of each blade.

[0031] However, in workplaces and event venues where clothing fans 10 are used, a certain degree of noise and static is inevitable, and the impact of the number of blades on noise is relatively small. Rather, in the case of clothing fans 10, the wind noise caused by the rib structure formed on the intake port 10I and exhaust port 10F of the casing 30 has a large impact on noise. This rib structure is necessary for reasons such as maintaining the strength of the casing 30 and preventing contact between the propeller fan 20 and external devices.

[0032] On the other hand, unlike computer cooling fans or automobile cooling fans, the clothing fan 10 is not in the same position when driving, and its position and posture change significantly depending on the movement of the wearer. In this case, the propeller fan 20 with an even number of blades and blades in opposing positions is not only rotationally symmetric but also linearly symmetric, which improves the balance of the center of gravity and makes the blades more resistant to posture changes and forces. Furthermore, when the output voltage is adjusted in stages by the battery, the presence of blades in opposing positions makes it easy to instantaneously increase the rotation speed of the propeller fan 20.

[0033] On the other hand, when using an even number of blades, in order to obtain the required air volume with fewer blades, it is necessary to attach the blades to the hub as flat as possible (along the hub tip surface 21T2) and increase the blade width. However, if the attachment angle is small and the blades are configured with a wide blade width, the force applied to the base of the blade increases, and from the standpoint of hub strength, the axial length of the side of the hub must be sufficiently secured. Increasing the axial length of the hub makes it impossible to realize a thin fan.

[0034] In the propeller fan 20 composed of eight blades 20A-20H, the force that each of the blades 20A-20H receives is smaller due to the increased number of blades than when the number of blades is reduced. Also, by ensuring spacing between the eight blades 20A-20H and preventing the blades from lying down, excessive force is not applied to the base of the blades.

[0035] Therefore, even if the blades 20A-20H are configured to have an axial width I corresponding to the axial length L of the hub 21, the strength of the hub 21 is sufficiently ensured. Therefore, the axial length L of the hub 21 can be made shorter than the axial length W (see FIG. 3) of the annular portion 36 of the casing 30, that is, the rotation area of ​​the blades 20A-20H can be contained within the annular portion 36. This leads to a shorter (thinner) axial width of the clothing fan 10.

[0036] Furthermore, even if the spacing between the eight blades 20A-20H is relatively large and the mounting angle is large (the blades are not horizontal), the clothing fan 10 attached to the garment 100 is located close to the body, so there is no need to blow air far along the fan axial direction like an electric fan; instead, it is preferable to blow air in the direction that it flows around the surroundings.

[0037] By fitting the propeller fan 20 into the annular portion 36 of the casing 30, the air flowing near the radially outermost blade edge (in the case of the blade 20B, the blade edges K3 to K4) is affected by the blade portion with the fastest rotation speed, and is discharged from near the frame 35 of the motor mounting portion 34, which has a ribbed structure. As a result, an effective flow can be created inside the clothing. Also, since the mounting angle of the eight blades 20A to 20H is relatively large and the blade width is restricted, noise from each blade can be restricted.

[0038] Furthermore, when propeller fan 20 is configured with eight blades 20A-20H, when the rotation speed becomes slow with the output voltage set low, negative pressure is maintained on the intake port 10I side compared to the exhaust port 10F side. Therefore, at the same rotation speed, air can be blown more efficiently than a propeller fan with fewer blades.

[0039] When the number of blades is more than eight, it is possible to configure the rotor with ten or twelve blades from the viewpoint of specific speed (model number). However, it becomes difficult to ensure the spacing, and the force acting on the blades becomes large, making the rotor unsuitable for high-speed rotation. Therefore, it is preferable to configure the rotor with eight blades 20A to 20H. However, even if the rotor is configured with ten or twelve blades, the effect of an even number of blades can be obtained. Note that, within an allowable range where the blades have linear symmetry, an even number of blades may be attached to the hub at unequal intervals. Considering the need to ensure spacing, it is possible to attach eight, ten, or twelve blades at unequal intervals with linear symmetry.

[0040] 2 and 6, the structure of the motor housing 50 that prevents the motor from overheating will be described. The motor housing 50 is composed of a cylindrical portion 52 having a tip surface 52K, and a skirt portion 54 extending from the lower end of the cylindrical portion 52. A hole through which the output shaft of the motor 70 passes is formed in the tip surface 52K, and the motor 70 is fixed inside the motor housing 50 at a position where it contacts the back surface 52B (see FIG. 2) of the tip surface 52K.

[0041] Hub 21 of propeller fan 20 has a size capable of accommodating cylindrical portion 52 of motor housing 50, and cylindrical portion 52 is covered (surrounded) by hub 21. At this time, the position of bottom end 21P of hub 21 exceeds the position of opening 52M along the housing axial direction (see dashed line L' in FIG. 6). A gap is formed between inner circumferential surface 21M of hub 21 (see FIG. 5) and side surface 52S of cylindrical portion 52.

[0042] A plurality of openings 52M are formed in the cylindrical portion 52 along the axial direction from the edge of the tip surface 52K. Here, six rectangular openings 52M are formed at equal intervals along the circumferential direction of the housing. Furthermore, four of the six openings 52M are formed at positions spaced apart from the engagement hole 54K with the lid 60 along the axial direction.

[0043] Forming such an opening 52M can prevent the motor 70 from overheating. That is, while the motor 70 is rotating, the temperature of the motor 70 rises, and in particular, the temperature of the tip side of the motor 70 close to the hub 21 rises. This becomes more noticeable when the output voltage of the battery is increased. However, the heat of the motor 70 is released into the gap between the motor housing 50 and the hub 21 through the opening 52M, so that the temperature rise of the motor 70 is prevented.

[0044] That is, the air heated near the tip of the motor 70 in the motor housing 50 is at a high temperature and therefore tends to flow out from the opening 52M and escape to the outside through the gap between the motor housing 50 and the hub 21. This flow creates an airflow in which relatively cool air flows into the motor housing 50. Also, by providing the engagement hole 54K at a position away from the opening 52M along the housing axial direction, an airflow in which hot air flows out from the gap between the motor housing 50 and the hub 21 is easily created.

[0045] Incidentally, the original function of the clothing fan 10 is to suppress sweating by blowing air, and it is undesirable for air warmed by heat dissipation from the motor 70 to be blown into the clothing 100. However, because the opening 52M is covered by the hub 21, the air flowing out from the gap between the hub 21 and the motor housing 50 flows along the vicinity of the surface of the skirt portion 54 toward the outlet port 10F.

[0046] The blades 20A-20H of the propeller fan 20 rotate faster toward the blade tips, and the airflow of the clothes fan 10 is greatly affected by the air flowing near the blade tips. This makes it possible to prevent the heat released along the motor housing 50 from directly affecting the air sent into the clothes 100.

[0047] The configuration of the opening 52M, such as the shape and position, is not limited to the above configuration, and it is also possible to form openings extending along the housing radial direction, or to form openings at unequal pitches. Also, the openings may be formed from the side surface 52S to the tip surface 52K of the cylindrical portion 52 of the motor housing 50, or an independent opening may be formed only on the tip surface 52K. On the other hand, the hub 21 may be configured to partially cover the opening (symbol L' in FIG. 6 is located midway through the opening 52M), or an opening may be formed on the discharge port 10F side along the housing axial direction away from the edge of the tip surface 52K.

[0048] 2, 7, and 8, the installation of the ring 40 on the clothing fan 10 by screwing it will be described. A female thread 40M is formed on the inner peripheral surface of the ring 40 (see FIG. 7), and the ring 40 can be screwed until it comes into contact with the flange 32F of the main body 32. Furthermore, the contact surfaces of the ring 40 and the flange 32F are formed with complementary profiles along the circumferential direction to restrict rotation of the ring 40 in the loosening direction.

[0049] 2, 7, and 8 show an example of the profile in which protrusions are formed on each other's surfaces. As shown in Fig. 7, a plurality of protrusions 42 are formed at predetermined intervals (here, 30 evenly spaced) over the entire circumferential direction on the bottom surface (hereinafter, referred to as the flange-facing surface) 42P of the ring 40. Meanwhile, a plurality of protrusions are also formed at predetermined intervals along the circumferential direction on the top surface (hereinafter, referred to as the ring-facing surface) 32P of the flange 32F of the main body 32. Here, four protrusions 33 are formed at equal intervals (two are shown in Fig. 2, and one is shown in Fig. 8).

[0050] The protrusion 42 formed on the flange-facing surface 42P of the ring 40 has a cross-sectional shape that is smoothly curved along the circumferential direction, and no edges are formed on its surface. On the other hand, the protrusion 33 formed on the ring-facing surface 32P of the main body 32 has a trapezoidal cross-sectional shape and edges are formed here. The height of the protrusion 42 from the flange-facing surface 42P is approximately equal to the height of the protrusion 33 from the ring-facing surface 32P.

[0051] 8 shows the contact state of the protrusions 42 and the protrusions 33 when the ring 40 is in the tightest position (a position where the ring 40 cannot turn any further in relation to the female thread 40M and the male thread 36, hereinafter referred to as the maximum tightening position) without clamping the garment 100. The circumferential distance between the protrusions 42 formed on the flange-facing surface 42P of the ring 40 is longer than the circumferential width of the protrusions 33 formed on the main body portion 32 (flange 32F). When the ring 40 is in the maximum tightening position, each of the protrusions 33 is interposed between the adjacent protrusions 42 on both sides.

[0052] As the ring 40 is rotated to the maximum tightening position, the flange-facing surface 42P of the ring 40 gradually approaches the ring-facing surface 32P of the main body 32. Before reaching the maximum tightening position, some of the protrusions 33 of the ring-facing surface 32P of the main body 32 come into contact with the protrusions 42 of the flange-facing surface 42P of the ring 40, and the ring 40 rotates with resistance to the final maximum tightening position.

[0053] Incidentally, the ring 40 is actually tightened with the garment 100 sandwiched between the ring 40 and the flange 32F. If the fabric of the garment 100 is very thin, the ring 40 can be turned to the maximum tightening position with almost no effect from the fabric. Therefore, once the ring 40 is turned to the maximum tightening position, resistance is encountered when the convex portion 42 attempts to get over the convex portion 33, and therefore rotation of the ring 40 in the loosening direction is restricted.

[0054] Furthermore, even if the fabric of garment 100 is relatively thick, convex portions 42 and 33 have complementary shapes that sandwich garment 100 between them and receive resistance from each other before ring 40 reaches the maximum tightening position, so that rotation of ring 40 in the loosening direction can be suppressed even near the maximum tightening position.

[0055] Furthermore, frictional resistance increases as the clothing sandwiched between convex portions 42 and 33 undulates, making it possible to suppress rotation of ring 40 in the loosening direction even before convex portions 42 and 33 sandwich clothing 100 between them and encounter resistance from each other.

[0056] On the other hand, when the convex portion 33 of the flange 32F is interposed between the adjacent convex portions 42 of the ring 40, there is a small gap between the convex portion 33 and the convex portions 42 on both sides adjacent to it. This gap allows the ring 40 to rotate slightly, and the user can loosen the ring 40 by applying momentum when rotating the ring 40 in the loosening direction, so that the convex portion 33 overcomes the convex portion 42. Note that the shapes of the convex portions 33 and the convex portions 42 can be other than those described above, and any height and cross-sectional shape may be used as long as they can pinch the garment 100 and apply force to each other when the ring 40 is twisted and turned, and the ring 40 can be rotated to the maximum tightening position or a position near that position.

[0057] As described above, by forming complementary profiles in which contact between the protrusions 42 and 33 acts as a means for restricting rotation of the ring 40 in the loosening direction, the clothing fan 10 can be securely attached to the clothing 100. Furthermore, by forming a large number of protrusions 42 at relatively short intervals on the flange facing surface 42P and making the circumferential width of the protrusions 33 shorter than this interval, the gap distance between the flange facing surface 42P and the ring facing surface 32P becomes approximately equal over the entire circumferential direction, making it easier to clamp the fabric of the clothing 100 with an even force over the entire circumferential direction.

[0058] The number of convex portions 42 and convex portions 33 can be set to numbers other than those mentioned above (for example, the number of convex portions 33 is in the range of 20 to 40, and the number of convex portions 42 is in the range of 2 to 10). Also, the convex portions 33 may be formed on the ring opposing surface 32P, and the convex portions 42 may be formed on the flange opposing surface 32P, as long as the number of convex portions on one side is greater than the number of convex portions on the other side. Also, the complementary profiles are not limited to a configuration in which convex portions are formed on each other, and may be a configuration of concave portions and convex portions.

[0059] The above-mentioned configuration of propeller fan 20 with an even number of blades can also be applied to a clothing fan that does not have a configuration in which the opposing surfaces of ring 40 and flange 32F have complementary profiles, and does not have a heat dissipation structure for motor housing 50. Similarly, the heat dissipation structure for motor housing 50 is applicable to a clothing fan that does not have a configuration of propeller fan 20 with an even number of blades, and a configuration in which the opposing surfaces of ring 40 and flange 32F have complementary profiles, and the configuration in which the opposing surfaces of ring 40 and flange 32F have complementary profiles is applicable to a clothing fan that does not have a configuration of propeller fan 20 with an even number of blades, and a heat dissipation structure for motor housing 50. [Explanation of symbols]

[0060] 10. Clothing Fan 20 Propeller Fan 20A~20H Feather 21 Hub 30 Casing 32 Main body 32F flange 32P Ring facing surface 33 Convex 34 Motor mounting part 40 Ring 42 Convex 42P Flange facing surface 50 Motor housing 52M opening 70 Motor

Claims

1. A propeller fan with multiple blades attached to a hub, a cylindrical motor housing that houses a motor and is surrounded by the hub; a frame body having a ribbed structure to which the motor housing is attached and which defines a discharge port, At least one opening is formed in a side surface of the motor housing, the hub covers the opening; A clothing fan characterized in that a hole for attaching a lid that covers the motor housing is formed on the side of the motor housing, at a position away from the opening toward the outlet along the housing axial direction.

2. 2. The clothing fan according to claim 1, wherein the opening is formed on a hub tip surface side of a rear end position in the axial direction of the hub.

3. 3. The clothes fan according to claim 1, wherein the opening extends axially from an edge of a front end surface of the housing to a side surface of the housing.

4. 4. A clothes fan according to claim 1, wherein a plurality of openings are formed at predetermined intervals in the circumferential direction of the housing.

5. Clothing comprising the clothing fan according to any one of claims 1 to 4.

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