JP7637402B2 - Clothing fan and clothing equipped with same - Google Patents

Description

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

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 body (casing). The fan is attached to the clothing by clamping the edge of a mounting hole formed in the clothing to the body (see, for example, Patent Document 1).

Utility Model Registration No. 3213564

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

Therefore, there is a demand for a fan structure for clothing fans that prevents the motor from overheating without compromising the cooling function.

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. At least one opening is formed in the side surface of the motor housing and/or the tip surface on the propeller fan side, and the hub covers the opening. For example, the motor housing is partially surrounded by the hub.

Air heated inside the motor housing flows through the gap formed between the side of the motor housing and the inner surface of the hub through the opening.

The present invention provides a fan structure for clothing fans that prevents the motor from overheating without compromising the cooling function.

FIG. 2 is a perspective view of the clothing fan as seen from the intake side. FIG. 2 is an exploded perspective view of the clothes fan as viewed from the outlet side. FIG. 2 is a side view of the clothing fan. FIG. FIG. 2 is a perspective view of the propeller fan as viewed from the outlet side. FIG. 2 is an exploded perspective view of the propeller fan and the motor housing as viewed from the intake port side. FIG. FIG. 4 is a partial enlarged view of FIG. 3 showing a contact portion between the ring and the flange.

The clothing fan of this embodiment will now be described with reference to the drawings. Figure 1 is a perspective view of the clothing fan as seen from the inlet side. Figure 2 is an exploded perspective view of the clothing fan as seen from the outlet side. Figure 3 is a side view of the clothing fan. The overall configuration of the clothing fan will be described with reference to Figures 1 to 3.

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

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

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

The motor mounting section 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 such as a brushless motor (not shown here) in its internal space 54B. The ribbed structure of the motor mounting section 34 is structured such that multiple 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.

A connection part 55 that protrudes radially is formed near the opening of the motor housing 50. A power cable (neither shown) that connects to a battery is connected to an input terminal 54M provided at the connection port 55 of the motor housing 50. The propeller fan 20 is attached to the output shaft of a motor that is arranged coaxially in the casing 30, and rotates when driven by the motor. The 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 steps. The propeller fan 20 sends an amount of air according to the output voltage to the outlet 10F side.

The ring 40 is a retaining member that holds the garment 100 (the periphery 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 can rotate until the flange 40F formed on the outlet side end of the ring 40 comes into contact with the flange 32F of the main body 32.

With the ring 40 removed, the user inserts the casing 30 from the motor mounting section 34 side into the mounting hole 100R of the garment 100. The ring 40 is then 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.

The clothing fan 10 of this embodiment is a thin fan with a narrow width along the fan axis E (see FIG. 3), and is realized by the configuration of the propeller fan 20. The motor housing 50 is also 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, it is configured to restrict rotation of the ring 40 in the direction that would loosen it. These will be described in detail below.

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

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

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

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

The eight blades 20A-20H are attached over the entire axial direction of the side surface 21S of the hub 21 (hereinafter referred to as the hub side surface). In other words, 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 blade 20B, the leading edge K1 at the base is located near the bottom end 21P of the hub 21, and the trailing edge K2 is located near the edge 21N of the tip surface 21T2 of the hub 21.

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) are aligned along a plane perpendicular to the axis E of the 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 an edged blade shape at the leading and trailing edges (K3 and K4 in the case of blade 20B).

On the other hand, when the three-dimensional blade shape of blades 20A-20H is viewed along the radial direction, the blade edges near the tip surface edge 21N of the hub 21 (blade edges K2-K4 in the case of blade 20B) are curved to a greater degree than the blade edges near the bottom end 21P of the hub 21 (blade edges K1-K3 in the case of blade 20B), and the curved shape has a more twisted shape the closer it is to the tip surface 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).

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

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

The spacing (pitch), i.e., the distance between the rear ends of the outermost blade edges of adjacent blades (equivalent to the distance along the circumferential direction between K4 and K6 in the case of blades 20A and 20B), is greater than the blade 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 because spacing and blade chord length are technically common knowledge to those skilled in the art, the development diagram of the blade row is omitted.

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

Traditionally, an even number of blades was thought to be more likely to cause resonance and lead to adverse effects such as noise, so the number of blades was set to an odd number in electric fans, automobile radiator cooling fans, and small computer cooling fans (three, five, or seven in the case of electric fans). In other words, the blades are attached at positions offset from the positions where they face each other.

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 10I and exhaust 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 equipment.

On the other hand, unlike computer cooling fans or automobile cooling fans, the clothing fan 10 is not positioned in the same place when driving, and its position and posture change significantly depending on the movement of the person wearing the clothing. In this case, an even number of propeller fans 20 with blades in opposing positions are not only rotationally symmetric but also linearly symmetric, which results in a better center of gravity balance and better blade resistance when subjected to posture changes or force. 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.

On the other hand, when using an even number of blades, if you want to obtain the required air volume with a reduced number of blades, you need to attach the blades to the hub as horizontally as possible (along the hub tip surface 21T2) and increase the blade width. However, if you use blades with a wide blade width with a small mounting angle, the force applied to the base of the blade increases, and from the perspective 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 achieve a thin fan.

The propeller fan 20, which is made up of eight blades 20A-20H, receives less force from each of the blades 20A-20H due to the increased number of blades, compared to a case in which 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.

As a result, even if the blades 20A-20H are constructed with an axial width I that corresponds 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, i.e., 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.

Even if the spacing between the eight blades 20A-20H is relatively large and the mounting angle is large (the blades are not flat), 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 axis like an electric fan, and instead it is preferable to blow air in the direction that it flows around.

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 blade 20B, blade edges K3 to K4) is influenced 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. In addition, because the mounting angle of the eight blades 20A to 20H is relatively large and the blade width is kept small, noise from each blade can be kept low.

Furthermore, when the 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.

When constructing the blades with more than eight blades, it is possible to construct with ten or twelve blades from the viewpoint of specific speed (type number). However, it becomes difficult to ensure spacing, and the force acting on the blades becomes large, making it unsuitable for high speed rotation, so it is preferable to construct with eight blades 20A-20H. However, even if it is constructed with ten or twelve blades, the effect of an even number of blades can be obtained. Note that, within the range where linear symmetry of the blades is acceptable, an even number of blades may be attached to the hub at unequal intervals. If consideration is given to ensuring spacing, it is possible to attach eight, ten, or twelve blades at unequal intervals with linear symmetry.

Next, the structure of the motor housing 50, which prevents the motor from overheating, will be described with reference to Figures 2 and 6. 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 is formed in the tip surface 52K through which the output shaft of the motor 70 passes, and the motor 70 is fixed inside the motor housing 50 at a position where it contacts the back surface 52B (see Figure 2) of the tip surface 52K.

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

The cylindrical portion 52 has multiple openings 52M formed 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. In addition, four of the six openings 52M are formed at positions away from the engagement hole 54K with the lid 60 along the axial direction.

By forming such an opening 52M, it is possible to 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 rises at the tip of the motor 70 close to the hub 21. This is 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, thereby preventing the temperature rise of the motor 70.

In other words, the air that is warmed near the tip of the motor 70 in the motor housing 50 is hot and therefore tends to flow out of the opening 52M and out 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. In addition, 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 of the gap between the motor housing 50 and the hub 21 is easily created.

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 toward the outlet 10F along the surface of the skirt portion 54.

The blades 20A-20H of the propeller fan 20 rotate faster at the blade tips, and the air volume of the clothing fan 10 is greatly affected by the air flowing near the blade tips. This prevents the heat released along the motor housing 50 from directly affecting the air sent into the clothing 100.

The shape, position, and other configurations of the openings 52M are not limited to those described above, and it is also possible to form openings that extend along the housing radial direction, or to form openings at unequal pitches. In addition, 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 halfway 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.

Next, the installation of the ring 40 on the clothing fan 10 by screwing it will be described with reference to Figures 2, 7, and 8. A female thread 40M is formed on the inner peripheral surface of the ring 40 (see Figure 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 that restrict rotation of the ring 40 in the loosening direction.

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

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 with edges. 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.

Figure 8 shows the contact state of the protrusions 42 and 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 male thread 36, hereinafter referred to as the maximum tightening position) without the garment 100 being clamped. 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 protrusion 33 is interposed between adjacent protrusions 42 on both sides.

When 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.

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, by rotating the ring 40 to the maximum tightening position once, the convex portion 42 encounters resistance when it tries to get over the convex portion 33, and therefore rotation of the ring 40 in the loosening direction is restricted.

In addition, even if the fabric of the garment 100 is relatively thick, the convex portions 42 and 33 have complementary shapes that sandwich the garment 100 and provide resistance to each other before the ring 40 reaches the maximum tightening position, so that rotation of the ring 40 in the loosening direction can be suppressed even near the maximum tightening position.

Furthermore, frictional resistance increases as the clothing sandwiched between the protrusions 42 and 33 ripples, making it possible to suppress rotation of the ring 40 in the loosening direction even before the protrusions 42 and 33 sandwich the clothing 100 and encounter resistance from each other.

On the other hand, when the convex portion 33 of the flange 32F is interposed between 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 of it. This gap allows for slight minute rotation of the ring 40, and the user can loosen the ring 40 by applying momentum when rotating the ring 40 in the direction to loosen it, so that the convex portion 33 overcomes the convex portion 42. Note that the shapes of the convex portions 33 and 42 can be other than those described above, and it is sufficient that the height and cross-sectional shape are such that when the ring 40 is twisted, they apply force to each other by sandwiching the garment 100, and the ring 40 can be rotated to the maximum tightening position or a position nearby.

As explained above, by forming complementary profiles in which contact between the protrusions 42 and 33 acts as a means for restricting rotation in the loosening direction of the ring 40, the clothing fan 10 can be securely attached to the clothing 100. In addition, by forming a large number of protrusions 42 at relatively short intervals on the flange opposing surface 42P and making the circumferential width of the protrusions 33 shorter than that interval, the gap distance between the flange opposing surface 42P and the ring opposing 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.

The number of convex portions 42 and convex portions 33 can be set to numbers other than those mentioned above (for example, convex portions 33 in the range of 20 to 40, and convex portions 42 in the range of 2 to 10). Convex portions 33 may be formed on the ring-facing surface 32P, and convex portions 42 may be formed on the flange-facing surface 32P, with the number of convex portions on one side being greater than the number of convex portions on the other side. Furthermore, 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.

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

REFERENCE SIGNS LIST 10 clothing fan 20 propeller fan 20A to 20H blade 21 hub 30 casing 32 main body 32F flange 32P ring facing surface 33 protrusion 34 motor mounting portion 40 ring 42 protrusion 42P flange facing surface 50 motor housing 52M opening 70 motor

Claims (5)

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. The clothing fan according to claim 1, characterized in that the opening is formed on the hub tip surface side from the rear end position along the axial direction of the hub. The clothing fan according to claim 1 or 2, characterized in that the opening extends axially from the housing tip surface edge to the housing side surface. A clothing fan according to any one of claims 1 to 3, characterized in that a plurality of openings are formed at predetermined intervals around the circumference of the housing. Clothing comprising the clothing fan according to any one of claims 1 to 4.

Images