JPS6352238B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a flow direction control device for a cross flow fan.

Conventionally, a cross flow fan has a rear guider and a stabilizer as casing components that form the flow, and it has been necessary to rotate these together in order to control the flow direction. However, in this case, these casing components are large and the deflection mechanism has a large-scale configuration, so that directional control over a wide angle has not been achieved. In particular, I couldn't find anything that controls the direction around the entire circumference of the fan.

An object of the present invention is to solve the above-mentioned conventional problems by simply rotating the control vanes provided inside the fan and the rear guider outside the fan, without creating a large-scale configuration. ,
The aim is to realize flow direction control over the entire circumference of the fan.

In particular, it is an object of the present invention to improve the convergence of the flow at the back surface of the control vane by using a back guider.

In addition, by arranging the back guider at a position where the blowout width and suction width of the flow on the back side of the control vane are approximately equal, the blowing flow and the blowout are arranged in a symmetrical position with respect to the control vane. This is what I did.

Further, by arranging the back guider at a position where the blowing width of the flow from the back side of the control vane is smaller than the blowing width, the convergence of the blowing flow is further improved.

Furthermore, the set position of the back guider is made variable so that the blowout width and suction width of the flow behind the control vane can be changed, thereby making it possible to adjust the convergence of the blowout flow.

Hereinafter, one embodiment of the present invention will be explained in Figs. 1 and 5.
This will be explained based on the diagram. 1 is a flow direction control device;
2 is a cross flow fan, and 3 is a motor. The end plates 4 and 5 of the cross flow fan 2 are rotatably supported by bearings 8 and 9 provided on side plates 6 and 7, respectively. The end plate 5 is the shaft 1 of the motor 3
0, thereby causing the cross flow fan 2 to rotate together with the shaft 10 of the motor 3 about this as the central axis. The motor 3 includes a motor support member 11
It is fixed to the side plate 7 by. Further, the side plate 6 is fixed by three pillars 12 erected on the side plate 7. 13 is a casing of the motor, which fixes the side plate 7. The casing 13 also includes a dial 14 for turning on and off the rotation of the motor 3;
A dial 15 for controlling the rotation speed is also attached. Furthermore, an opening 16 is provided in the casing 13 for cooling the motor 3 by means of natural ventilation. Control vanes 17 are arranged inside the crossflow fan 2 . One rotating shaft 18 that pivotally supports this control blade 17 passes through the hollow part of the end plate 4 formed in the shape of a hollow shaft, and passes through the hollow part of the side plate 4.
It is rotatably held by a holding plate 19 fixed to. The other rotating shaft 20 that supports the control blade 17 is rotatably held relative to the shaft 10 of the motor 3 by a recess 21 provided at the end of the shaft 10. Both rotating shafts 18, 20
is rotatable about the shaft 10 of the motor 3, that is, the central axis of rotation of the cross flow fan 2, and this rotation is performed by a lever 22 fixed to the rotation shaft 18. This lever 22 is configured so that it can be locked at any position by a locking member 23 that is attached to the lever 22 and engages with the side plate 6.

Further, the control blade 17 has a substantially arcuate cross section, and is disposed such that both ends 24 and 25 thereof are close to the inner periphery 26 of the cross flow fan 2. Reference numeral 27 denotes a back guider, which is formed along the outer periphery of the cross flow fan and has a substantially arcuate cross section. The shafts 28 and 29 that pivotally support the back guider are inserted into annular grooves 30 and 31 provided in the side plates 6 and 7, and are inserted into the back guider 2.
7 is disposed to face the back surface portion 32 of the control vane 17. The shaft 28 of this back guider 27
is the extension part 3 of the locking member 23 at its upper part.
It is fixed at 3. Also, the position of the rear guider 27 is based on the suction width Wi and the blowout width Wo in Fig. 4.
are arranged so that they are almost equal. With the above configuration, as the lever 22 rotates, the control blade 17 and the back guider 27 can be moved simultaneously while maintaining a constant positional relationship, and can be set at any position on the circumference.

Next, the operation of the device of the present invention will be explained. When the dial 14 is turned on in FIGS. 1 and 2, the motor 3 rotates, and the end plate 5 fixed to its shaft 10 rotates, thereby causing the cross flow fan 2 to rotate. When the control vane 17 is in the position shown in FIG. 4, if the direction of rotation of the crossflow fan 2 is clockwise as shown by arrow C, then the low-pressure vortex V also becomes a vortex with clockwise rotation. This vortex V is caused by the control blade 17 having a substantially arc shape, and its both ends 2
4 and 25 are close to the inner periphery 26 of the crossflow fan 2 and are therefore formed in the recessed region of the control vane 17. As a result, the flow at the back surface 32 of the control vane 17 is directed from Xi to Xo.
Due to the presence of the back guider 27, stronger directional flows are formed for both suction and blowout compared to a case without the back guider 27. In this case, since the suction width Wi and the outlet width Wo are approximately equal, the flow from Xi to Xo is controlled by the control vane 1.
7 follows a symmetrical path. Also, since the blowout width Wo is determined by the presence of the back guider 27, the blowout flow is controlled by the back guider 27.
The flow is more focused than in the case without it.

FIG. 5 shows the case where the lever is rotated clockwise from the position shown in FIG. In this case, as shown in the configuration, since the control vane 17 and the back guider 27 rotate with a constant relative positional relationship, the fourth
Low pressure vortex V and
A flow from Yi to Yo occurs. That is, the flow direction Xo in FIG. 4 is changed to the direction Yo, and the characteristics do not change at all during this time. In this way, by rotating the lever 22, it is possible to control the direction at any position in the circumferential direction without causing any change in characteristics. Furthermore, the presence of the back guider 27 makes the blowing flow highly focused.

As described above, the flow direction control device of the present invention uses the substantially arc-shaped control vanes provided inside the crossflow fan and the substantially arc-shaped rear guider provided opposite to the rear surface of the control vanes. Directional control over the entire circumference of the fan is now possible with enhanced flow convergence. In particular, improving the convergence of the blowout flow is effective when increasing the reach of the flow.

When the suction width and the blowout width of the backside flow are made almost equal as in the above embodiment, it is possible to form the suction flow and the blowout flow symmetrically with respect to the control blade.

FIG. 6 shows another embodiment in which the relative positional relationship between the control vane and the rear guider is changed. The back guider 34 has a substantially arcuate cross-sectional shape along the outer periphery of the cross flow fan 2, and is arranged at a position such that the blowout width Wo is smaller than the suction width Wi in the flow on the back side of the control vane 17. has been done. If the direction of rotation of the crossflow fan 2 is clockwise as shown by arrow C in FIG. It is formed by As a result, the flow at the back surface 32 of the control vane 17 is smaller than Zi.
The flow is directed toward Zo, but due to the presence of the back guider 34, a flow with directionality in both suction and blowout is formed compared to a case without the back guider 34. In this case, since the blowout width Wo is made smaller than the suction width Wi, a particularly highly focused blowout flow can be obtained.

FIGS. 7 and 8 show still another embodiment in which the relative positional relationship between the back guider and the control vane is made variable. In FIG. 7, the back guider 35 has slit grooves 36 and 37 provided at its upper and lower parts. Therefore, the shafts 28 and 29 of the rear guider 35 are connected to the slit grooves 36 and 3 by screws 38 and 39 attached to the shafts.
7 can be fixed at any position.
As shown in FIG. 8, the back surface 32 of the control vane 17
It is possible to adjust the suction width Wi and the blowout width Wo in the side flow. Assuming that the crossflow fan 2 is in a clockwise direction as shown by the arrow C in FIG. Ru. As a result, the flow at the back surface 32 of the control vane 17 is directed from Pi to Po, but due to the presence of the back guider 35,
Compared to the case without this back guider 35, a flow with directionality is formed for both suction and blowout. In this embodiment, the fixing position of the back guider 35 is selected at an arbitrary position between the slit grooves 36 and 37.
It can be fixed with screws 38 and 39, so the suction width Wi
The ratio of the blowout width Wo to the blowout width Wo can be variously changed, and the convergence of the blowout flow can be made stronger or weaker or set as desired.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the flow direction control device according to the present invention, FIG. 2 is a sectional view taken along line A-A' in FIG. 1, FIG. 3 is an enlarged perspective view of the back guider, FIGS.
Both figures are BB' cross-sectional views in FIG. 2, and are diagrams showing the flow conditions inside the crossflow fan at different control vane positions. FIG. 6 is a diagram showing the inside of the crossflow fan in another embodiment of the invention. 7 is an enlarged perspective view of a rear guider in still another embodiment of the present invention, and FIG. 8 is a cross-sectional view showing the flow in the cross flow fan when the rear guider of FIG. 7 is used. FIG. 1... Flow direction control device, 2... Cross flow fan, 3... Motor, 4, 5... End plate, 6, 7
... Side plate, 10 ... Motor shaft, 17 ... Control vane, 18, 20 ... Rotating shaft, 22 ... Lever, 2
4, 25...Both ends of the control vane, 26...Inner periphery,
27...Back guider, 32...Back view of control vane, 34...Back guider, 35...Back guider, Wi, Yi...Suction width, Wo, Yo...Blowout width.

Claims (1)

[Scope of Claims] 1. A crossflow fan rotated by a motor; a nearly arc-shaped control blade disposed inside the crossflow fan so that both ends thereof are close to the inner circumference of the crossflow fan; and a back guider arranged along the outer periphery of the flow fan and facing the back surface of the control vane, and the control vane and the back guider rotate about an axis concentric with the central axis of the cross flow fan. The flow direction control device is configured to be movable, and the control vane and the back guider are arranged in a relative positional relationship such that the ratio between the suction width and the blowout width of the air flow path between them is constant or variable. 2 As a configuration in which the control vane and the rear guider rotate about an axis concentric with the center axis of the cross flow fan,
The end plates at both ends of the cross flow fan are rotatably supported by bearings provided on the side plates, one end plate is fixed to the shaft of the motor, and one rotating shaft of the control vane is connected to the hollow shaft of the other end plate. The control vane is rotatably held in a holding plate on the side plate to fix the lever, and the other rotating shaft of the control vane is rotatably held in a recess in the motor shaft.
The flow direction control device according to claim 1, wherein the back guider is rotatably held by a shaft inserted into an annular groove provided in the side plate, and one of the shafts and the lever are fixed. . 3. Flow direction control according to claim 1, in which the relative positional relationship between the back guider and the control vane is such that the blowout width and suction width of the flow by the back guider and the back surface of the control vane are approximately equal. Device. 4. The flow direction control device according to claim 1, wherein the relative positional relationship between the back guider and the control vane is such that the blowing width of the flow by the back guider and the back surface of the control vane is smaller than the suction width. 5. Flow direction control according to claim 1, in which the relative positional relationship between the back guider and the control vane is movable, and the blowing width and suction width of the flow by the back guider and the back part of the control vane can be changed. Device.