JPH076672B2 - Flow deflector - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flow deflector provided at an outlet of an air conditioner or the like for deflecting a flow from a blower source at a wide angle.

2. Description of the Related Art As shown in FIGS. 10 and 11, a conventional flow deflector of the related art includes a plurality of blades 29 (these blades 29 are provided near an outlet 28 of a flow path 26 having an inlet 27 and an outlet 28). Rotates about axis 30.) to deflect the flow.

However, in the above-mentioned configuration, when the blade 29 is tilted, the flow collides with the blade and a pressure loss occurs. Therefore, there is a problem in that the flow rate is significantly reduced (the flow rate is halved when deflected by 60 °) when the flow is largely deflected.

The present invention solves such a conventional problem, and an object of the present invention is to deflect a flow to a wide angle with almost no reduction in air flow.

Means for Solving the Problems In order to solve the above problems, a flow deflecting device of the present invention includes a passage through which a fluid passes, a nozzle located at an end portion of the passage and smaller than the passage, and a downstream side of the nozzle. The constraining wall is provided with an enlarged constraining wall and a plurality of deflecting blades provided in the vicinity of the downstream end of the constraining wall. The constraining wall has the same width as the constraining wall due to diffusion of the jet width of the fluid from the nozzle. The length is shorter than the depth in the flow direction of the fluid up to.

Effect of the Invention With the above-described configuration, the present invention causes the flow narrowed by the nozzle to perform upstream deflection in the inclination direction of the deflection blades upstream of the plurality of deflection blades (this facilitates upstream deflection by the apertures). This is possible because the constraining wall is enlarged. That is, when the constraining wall is not enlarged as in the conventional example, the upstream deflection is blocked by the wall surface.) The collision with the blade is reduced as much as possible. By doing so, wide-angle deflection is performed with less pressure loss.

Embodiment An embodiment of the present invention will be described below with reference to the accompanying drawings.
1 and 2, reference numeral 1 denotes a rectangular passage through which a fluid passes, and a nozzle 2 having a width smaller than that of the passage 1 is provided at a downstream end of the passage 1 by a throttle 3. A constraining wall 4 that is wider than the width W of the nozzle is formed downstream of the nozzle 2, and a plurality of sheets that rotate about an axis 6 are provided in parallel with each other in the vicinity of the downstream end of the constraining wall 4. Deflection vanes 5 are arranged. Deflection blade 5
The overall width I of the above is substantially the same as the width H of the constraining wall.
However, it is effective if the overall width I is larger than the nozzle width W and smaller than the width H of the constraining wall. Here, the length 1 of the constraining wall 4 is formed to be shorter than the distance by which the flow having the width W exiting from the nozzle diffuses and becomes the width H of the constraining wall. (About W / 2
Is appropriate).

In the above structure, if the blade 5 is tilted to the left as shown in FIG. 3, the flow is largely deflected from the upstream side to the left side as shown in the figure, and a large deflection angle .theta. The reason why this phenomenon occurs will be described with reference to FIG. In FIG. 4, the flow A in the central portion of the flow emitted from the nozzle 2 impinges on the blades 5 without much upstream deflection. As a result, the pressure near the portion indicated by P in the figure rises. Due to this effect, the flow B on the left side of A is pushed by this pressure and escapes to the left side in the figure, and a vector pointing left is generated. As a result, the upstream deflection occurs, the flow direction follows the inclination of the blade 5, and the degree of collision decreases. This phenomenon is sequentially transmitted to the left side, and in the flow of F at the left end, the deflection is extremely large and upstream deflection is performed. As a result, as shown in the figure, since the air flow is deflected upstream by more than the inclination angle of the blade, the blowout flow also inclines more than the inclination angle of the blade, and the loss of the air volume hardly occurs. Therefore, the total merged flow G
Is largely deflected, and the decrease in air volume is reduced. Here, the upstream deflection of the flow F at the left end increases as the enlargement ratio H / W from the nozzle width W increases up to a certain size. Further, the length K of the blade 5 is best deflected when it is almost the same as the pitch J of the blade.

The experimental data in this case are shown in FIG. The horizontal axis of the figure shows the expansion ratio H / W with respect to the nozzle width W of the constraining wall, and the vertical axis shows the deflection angle θ. The deflection angle in this case is such that when the blade 5 is tilted, the air volume when the blade 5 is tilted is 0 °.
The deflection angle is shown for a 10% reduction. In this figure, it can be seen that as H / W is expanded from 1, the deflection angle θ rapidly expands and saturates at H / W of about 3. That is, there is a limit to the upstream deflection, and the value is up to an expansion rate of about 3 times the nozzle width.

Next, another embodiment of the present invention will be described with reference to FIGS. 6 and 7. In the figure, the difference from the above embodiment is that the nozzle 2
Also, the constraining wall 4 has a circular cross section. According to this configuration, the upstream deflection occurs not only in the inclination direction of the deflecting blade 5 but also in the longitudinal direction of the deflecting blade 5, the pressure loss is further reduced, and a large deflection angle can be obtained with a smaller air flow reduction. .

Next, an example in which the present invention is applied to an air conditioner will be described with reference to FIGS. 8 and 9. In the figure, 7 is an air conditioner indoor unit body, 8 is an air intake port, 9 is a fan intake port, 10
Is a fan, 11 is a heat exchanger, 12 is a flow passage, 13 is a nozzle, 14 is a throttle, 15 is a constraining wall, 16 is a plurality of deflection blades, 17
Is a shaft, 18 is a joint for tilting a plurality of deflection blades 16 in the same direction at the same time, 19 is a rotating frame for rotating the entire deflection blade, 20 is a motor for rotating the rotating frame 19, and is a motor shaft 21. Transmit rotation. 22 is a fan motor, 23 is a fan shaft, 24 is a support shaft for supporting the rotating frame 19, and 25 is a link mechanism for changing the inclination angle of the deflection blade 16.

In the above configuration, the flow entering from the suction port 8 is a fan
It flows outward by 10 and is heated or cooled by the heat exchanger 11, exits from the nozzle 13 and is deflected by the deflection blade 16 at a wide angle. Further, by rotating the entire deflection blade by the motor 20, it becomes possible to direct the flow not only in the lateral direction of the drawing but also in all directions. As a result, warm air or cold air can be sent to all positions in the room with almost no change in air volume, and comfortable air conditioning can be realized.

Effects of the Invention As described above, according to the flow deflecting device of the present invention, the following effects are obtained.

(1) Since the flow narrowed by the nozzle is deflected upstream in the enlarged constraining wall and then deflected by the deflection blade,
It is possible to deflect the flow to a wide angle with almost no reduction in air flow.

(2) When the present invention is applied to an air conditioner, the air-conditioning flow can be sent to every corner of the room without substantially reducing the blown air volume, that is, the air-conditioning capacity, and comfortable air conditioning can be realized.

[Brief description of drawings]

1 is a front sectional view of a flow deflector according to a first embodiment of the present invention, FIG. 2 is a plan view thereof, FIG. 3 is a plan sectional view of the same, and FIG. 4 is a partially enlarged sectional view of FIG. 5 is a diagram showing the characteristics of the present invention, FIG. 6 is a front sectional view of a flow deflecting device according to a second embodiment of the present invention, FIG. 7 is a plan view of the same, and FIG.
FIG. 9 is a front sectional view of an air conditioner to which the present invention is applied, FIG. 9 is a plan view of the same, FIG. 10 is a front sectional view of a conventional flow deflector,
FIG. 11 is a plan view of the same. 1 ... Passage, 2 ... Nozzle, 4 ... Restraint wall, 5 ... Deflection blade.

Claims (4)

[Claims] 1. A passage through which a fluid passes, a nozzle located at an end of the passage and smaller than the passage, an enlarged constraining wall located downstream of the nozzle, and provided near a downstream end of the constraining wall. A plurality of deflecting blades, and the restraint wall has a length shorter than the depth in the flow direction of the fluid until the jet width of the fluid from the nozzle diffuses and becomes the same width as the restraint wall. Flow deflector. 2. The flow deflecting device according to claim 1, wherein the downstream ends of the nozzle and the constraining wall are formed in a rectangular shape, and the plurality of deflecting vanes are arranged in parallel with each other. 3. The flow deflector according to claim 1, wherein the downstream ends of the nozzle and the constraining wall are formed in a circular shape, and the plurality of deflecting blades are arranged in parallel with each other. 4. The flow deflecting device according to claim 1, further comprising a drive source that supports the deflecting blades on a support frame and rotates the support frame.