JPS6145352Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Technical Field> The present invention relates to a cross flow fan device.

<Prior art> As shown in FIG. 1, a conventional cross-flow fan device is composed of a cross-flow fan 1 having a large number of blades 2 fixed at a predetermined angle, and a fan casing 3 having a special shape. By rotating in the direction of arrow A, a vortex 4 is generated in area A, and air is sucked in from area B and discharged to area C. However, such conventional configurations have various drawbacks as described below.

a Since the vortex 4 generated in area A rotates at high speed and moves in and out between the many blades 2, 2..., a large amount of energy is lost in this part, causing a performance problem.

b In area D, which is on the opposite side to area A, the surfaces of blades 2, 2... are perpendicular to the air flow, and in this area blades 2, 2...
...becomes an obstacle to air flow.

c Blades 2 and 2 in area A and area D.
Because the ... does not contribute to air blowing and does not perform the original function of the blades, the effective ventilation area of the crossflow fan is small, and the effective area is approximately 1/3 of the diameter.

d Because the discharge direction changes by more than 90 degrees with respect to the suction direction, it is necessary to provide a large space on the suction side, especially when incorporated into equipment that requires the suction and discharge directions to be in the same direction. This will lead to larger size.

e When changing the suction direction and the discharge direction, it is necessary to move the fan casing 3 located on the outer periphery of the cross flow fan 1, which becomes structurally complicated.

As described above, conventional cross flow fan devices have various drawbacks.

Moreover, conventionally, as shown in FIG. 2, each blade 2.
... is rotatably supported to make the blade angle variable, and as the crossflow fan 1 rotates in the direction of arrow A, each blade 2, 2... The blade surface is oriented perpendicular to the radial direction.On the intake side, the blade surface is aligned in the radial direction with its concave surface facing the rotation direction.On the discharge side, the blade surface is aligned in the radial direction and its convex surface is oriented in the direction of rotation. direction of rotation)
It is known that if the blades 2, 2, etc. in the area A are made to be variable, a vortex 4 can be generated inside the blades 2, 2, etc., and the air can be blown in the direction of the arrow B, and the above-mentioned drawbacks can be overcome. Until now, no practical means have been proposed as concrete means for achieving this effect.

<Purpose> In view of the above points, the present invention aims to improve the performance of a cross flow fan by providing a means for sequentially variably moving each blade to a predetermined angle as the fan rotates.

<Structure of the present invention> A large number of blades are installed between a pair of side plates, and the pair of side plates are pivotally supported so as to be rotatable, and the blades are rotatable at the central portion. The blade is pivotally supported between side plates, and a protrusion is provided on the side end surface of the blade that is spaced apart from the pivot point of the blade and protrudes to the outside of the blade, and the protrusion is passed through the side plate to the outside of the blade. An arc-shaped through hole is bored to allow the protrusion to move as it rotates, and on the outside of the side plate from which the protrusion protrudes, a tip of the protrusion is arranged eccentrically with respect to the center of rotation of the side plate and protrudes from the side plate. A sliding guide groove is provided, and the angle of the blade is sequentially changed by the sliding of the protrusion as the side plate rotates, and the blade is rotated in a direction that closes the inter-blade space at the vortex generation site, On the suction and discharge sides, it is a cross flow fan that is rotated at an angle suitable for suction and discharge.

<Example> Hereinafter, the example of the present invention shown in FIGS. 3 to 11 will be described in detail.

First, in the embodiments shown in FIGS. 3 to 8, 1
1 is a large number of blades 12 having a crescent-shaped cross section;
and fan side plates 13 located above and below the blades 12 to rotatably support each blade 12,
This is a cross flow fan composed of 13. Each of the blades 12 has both side edges at points X and
In the case of X', the center of rotation is a point _o1 located midway between these two points on the straight line connecting these two points, and pivots 14 and 14' centered on the point _o1 are provided at both upper and lower ends. . Further, at the upper end of each of the blades 12, a protrusion 15 is provided protruding from one side edge, for example, on the X' point side. Therefore, for each blade 12, if the number of blades is n and the distance between the point o ₁ and the rotation center of the cross flow fan 1 is r ₁ , then '≦2r ₁ sin
The relationship is set to 360/2n.

On the other hand, a large number of through holes 16, 16' are bored in the peripheral edges of the fan side plates 13, 13' at equal intervals in the circumferential direction.
4 and 14', each blade 12
is rotatably supported. Also, fan side plate 13
A circular arc groove 17 is formed at a suitable distance from each through hole 16 in the circumferential direction, and each of the circular grooves 17 has an arc shape drawn as the center of the through hole 16. A protrusion 15 of the blade 12 is inserted into the arcuate groove 17 to regulate the amount of rotation of the blade 12, that is, the variable range of the blade angle. In other words, the arcuate groove 17 is set so that the variable range of the blade angle is as shown in FIG.

18 is the fan side plate 1 of the cross flow fan 11
3, the guide plate has an annular shape centered on the rotation center _o2 of the cross flow fan 11, and the protrusion 15 of the blade 12, which penetrates the arcuate groove 17 of the fan side plate 13, slides on the lower surface. An endless guide groove 19 is formed into which the guide groove 19 can be freely inserted. The guide groove 19 is formed to correspond to the trajectory drawn by the center Y of the protrusion 15 (dotted line in FIG. 7) when the blade 12 is sequentially rotated at a predetermined angle based on FIG. 2. Therefore, when the cross flow fan 11 rotates, the protrusion 15 of each blade 12 slides in the guide groove 19, so that each blade 12 is rotated about the point _o1 and is successively variably moved to a predetermined angle as shown in FIG. It is something that can be given. Incidentally, the dotted line in FIG. 6 and the one-dot chain line in FIG. 7 indicate the trajectory drawn by the center of rotation of the blade 12 when the crossflow fan 11 rotates.

Next, its effect will be explained. For convenience of explanation, points E, F, and G are shown at 90 degree intervals around the cross flow fan 11 in FIGS. 7 and 8.
Points and H points are marked. First, individual blade 1
To explain the movement of No. 2, the blade 12 is E.
When it is near the point, the concave surface 12' is turned inward due to the relationship between the protrusion 15 and the guide groove 19, and the blade is rotated at an angle that closes the space between the blades 12.

Therefore, near this point E, the function is similar to that of the fan casing, and the vortex generated in the internal space surrounded by the blades 12 is controlled by the blades 12, which are similar to the fan casing, to flow into and out of the external space. will be prevented.

Next, as the blade 12 approaches point F by rotating in the direction of arrow A, the blade 12 is rotated clockwise by the guide groove 19 via the protrusion 15, and at point F, it is in the most rotated state in the clockwise direction. Therefore, this F
In the vicinity of the point, the blade 12 has its concave surface 12' facing the direction of rotation at an angle suitable for suction, thus performing an air suction action and drawing air into the interior.

Then, rotate from this point F in the direction of arrow A and
As it approaches the point, the blade 12 is rotated counterclockwise by the guide groove 19 through the protrusion 15;
Near point G, the concave surface 12' faces inward and faces the point E, which acts similarly to a fan casing. (in the direction of arrow B).

Furthermore, from this point G, rotate in the direction of arrow A and
As the blade 13 approaches the point, the blade 13 is further rotated counterclockwise by the guide groove 19 via the protrusion 15, and at the H point, it is in the most rotated state in the counterclockwise direction. Therefore, near this point H, the blades 12 have their convex surfaces 12'' facing the direction of rotation at an angle suitable for air delivery, which performs the air delivery action and discharges the air outward.As described above, each blade 12 has a cross section. As the flow fan 11 rotates, the angle changes sequentially to suit the position, and the cross flow fan 1
1, a vortex is generated inside the blade 12 near point F, that is, in area A, and air is blown in the direction of arrow B. In the above-mentioned embodiment, it is also possible to make the guide plate 18 disk-shaped and provide a bearing for the cross-flow fan 11 at the center thereof, so that the guide plate 18 also serves as a substrate for supporting the cross-flow fan 11. be.

In FIG. 9, the guide plate 18 is connected to the cross flow fan 11.
It is provided so that it can be rotated around the rotation center of the
By rotating this guide plate 18, the air blowing direction can be arbitrarily selected. That is, the guide plate 18 is rotatably mounted on the lower surface of the base plate 20 provided with the bearing 21 of the cross flow fan 11 using the mounting fittings 22, 22. In this case, for example, when the guide plate 18 is rotated 180 degrees while operating in the state shown in FIG. 8, the state of the blade 12 is switched between point F and point H, and the state of the blade 12 near point G A vortex is generated inside the tube, and air is blown in the direction opposite to the direction of arrow B. In this way, the direction of air blowing can be varied by rotating the guide plate 18, and the direction of air blowing can be arbitrarily selected within a range of 360 degrees. Note that 20' is another board equipped with a motor (not shown) for rotating the cross flow fan 11.

10 and 11, a guide plate 18 is provided on the lower surface of a base plate 20 using mounting brackets 23, 23 so as to be slidable in a direction perpendicular to the axial direction of the cross flow fan 11. Therefore, in this one,
From the state where the guide plate 18 is in the solid line state shown in FIG. 10 and blowing air in the direction of the solid line arrow, the guide plate 1
8 to the state shown by the two-dot chain line, the guide groove 19
The state of the blade 12 also changes from the solid line to the state shown by the two-dot chain line, and the state of the blade 12 is switched in the same way as described in the previous embodiment, and the air is blown in the direction of the two-dot chain arrow, which is opposite to the direction of the solid line arrow. Furthermore, in this example,
By sliding the guide plate 18 to a position where the distance between the side edges of adjacent blades is minimized when the air blowing is stopped, all the blades 12 will be in a state with their concave surfaces 12' facing inward, and the air blowing passage will be closed. It acts as a shutter to block the Furthermore, since the angle variable range of the blade 12 on the suction side changes by sliding the guide plate 18, the air drawing force changes, making it possible to adjust the amount of air blown.

In the present invention, in order to rotatably support each blade 12, it is necessary to maintain a constant distance between the fan side plates 13, 13'. A support may be installed between the blades 13' so as not to interfere with the rotation of the blade 12.

<Effects> According to the present invention, as the side plate rotates, the protrusion of the blade slides on the guide groove, and this sliding causes the blade to sequentially change its angle, so that at the vortex generation site, the gap between the blades is reduced. It is possible to close the space and rotate the blade at an angle suitable for suction and discharge at the suction and discharge portions.

Therefore, in the eddy current generation component, the eddy current is prevented from flowing into and out of the space surrounded by the blades, so energy loss in this eddy flow area is reduced, and efficient air blowing is possible. If the blades in the vortex area are in the direction that closes the space between the blades, the blades will be nearly parallel to the air flow direction, so when blowing air, the blades will not become an obstacle in the vortex area and will improve efficiency. It can provide good ventilation.

Furthermore, on the suction and discharge sides, the blades are rotated at angles suitable for suction and discharge by sliding with the guide grooves, so that efficient suction and discharge can be performed.

As described above, the protrusion of the blade slides along the guide groove as the side plate rotates, making it possible to sequentially rotate the blade to the most desirable angle in each part, creating a cross flow fan device with good performance. Can be provided.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing the configuration of a conventional cross flow fan device, Fig. 2 is an explanatory diagram showing another example of the conventional cross flow fan device, and Fig. 3 is an exploded configuration showing an embodiment of the cross flow fan device of the present invention. Perspective view,
Fig. 4 is an exploded perspective view of the cross flow fan in the same device, Fig. 5 a, b, and c are front, top, and bottom views of the blade in the same device, and Fig. 6 is the bottom view of the guide plate in the same device. 7 and 8 are explanatory diagrams of the operation of the device, FIG. 9 is an exploded perspective view showing another embodiment of the cross flow fan device of the present invention, and FIG. 10 is a cross flow fan device of the present invention. FIG. 11 is a bottom view of the guide plate in another embodiment, and FIG. 11 is a side view in half section of the same guide plate. 11: Cross flow fan, 12: Blade,
13: Fan side plate, 14: Pivot, 15: Projection, 1
7: Arc groove, 18: Guide plate, 19: Guide groove, o ₁ :
Center of rotation of the brake, o ₂ : Center of rotation of the cross flow fan.

Claims (1)

[Claims for Utility Model Registration] A device in which a large number of blades are installed between a pair of side plates, and the pair of side plates are pivotally supported to be rotatable, wherein the blades are rotatable at the central portion. The blade is pivotally supported between the side plates, and a protrusion is provided on the side end surface of the blade that is spaced apart from the pivot point of the blade and protrudes to the outside of the blade, and the protrusion is provided on the side plate to the outside of the side plate. An arc-shaped through hole is bored through the hole to allow movement of the protrusion that is stirred by the rotation of the blade, and the protrusion is placed eccentrically with respect to the rotation center of the side plate on the outside of the side plate from which the protrusion protrudes. A guide groove is provided in which the tip of the protruding protrusion slides, and the angle of the blade is sequentially changed by the sliding of the protrusion as the side plate rotates, thereby closing the space between the blades at the vortex generation site. A cross-flow fan device that rotates in the direction of the fan and rotates the suction and discharge portions at angles suitable for suction and discharge.