JPH05568B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention makes it possible to control the blowing flow from a circular nozzle in any direction, and to control another flow from the outer periphery of the nozzle in a direction different from the nozzle flow. It relates to a flow direction control device that blows out
It can be applied to various air conditioning equipment.

Structure of Conventional Example and its Problems Conventionally, as a means for deflecting the flow in an arbitrary direction, a method as shown in Japanese Utility Model Application Laid-Open No. 58-20839 has been known. However, this configuration has only one outlet and is narrowed, resulting in large airflow resistance, making it difficult to secure sufficient capacity when applied to air conditioning.

Purpose of the Invention In order to solve these conventional problems, the present invention generates a flow from a bypass opening in addition to the flow blown out from the circular nozzle, thereby reducing air flow resistance and allowing the flow blown out from the nozzle to flow in any direction. The purpose is to maintain the deflection function.

Structure of the Invention The present invention provides a sharp constriction part on the upstream side of a circular nozzle, a guide wall with a shape that gradually expands the flow path width on the downstream side, and a movement of a back pressure generating plate arranged on the upstream side of the bypass opening. In this way, deflection in any direction is achieved, and a bypass outlet communicating with a bypass opening is provided on the outer periphery of the circular nozzle, thereby reducing the overall air flow resistance.

DESCRIPTION OF EMBODIMENTS Next, embodiments of the present invention will be described with reference to FIGS. 1 to 9.

In FIGS. 1 to 9, 1 is a flow direction control device, 2 is an inlet thereof, and 3 is an outlet thereof.
The inlet section 2 is formed by a cylindrical section 4. At the upstream end of the outlet section 3, a circular nozzle 6 having a sharp constriction section 5 is held in the cylindrical section 4 by a support section 7. Further, an annular portion formed between the cylindrical portion 4 and the sharply constricted portion 5 serves as a bypass opening 8 . On the downstream side of the circular nozzle 6, a guide wall 9 is formed whose flow path width gradually expands toward the downstream side. In this case, the guide wall 9 has a substantially arcuate cross section. A back pressure generating plate 10 is arranged upstream of the bypass opening 8. The back pressure generating plate 10 has a closing part 11 for blocking the flow and a fan-shaped opening part 12 for passing the flow to the circular nozzle 6.
It is fixed to the shaft 14. The shaft 14 is slidably and rotatably held in a circular hole 17 passing through a locking portion 16 of a support portion 15 provided in the cylindrical portion 4 . Reference numeral 18 denotes an annular wall, and the flow from the bypass opening 8 passes through an annular chamber 20 defined by the annular wall 18 and the downstream end surface 19 of the cylindrical portion 4, and then flows out from the bypass outlet 21. . In this case, the annular wall 18 and the guide wall 9 are integrally formed.

Next, the operation will be explained.

In FIG. 2, part of the flow A ₁ flowing in from upstream flows out through the circular nozzle 6 and the rest flows out through the bypass opening 8 . Now, consider the flow inside the entrance section 2. Among the flows toward the circular nozzle 6, the flow near the center travels straight as shown by _B1 . On the other hand, the flow toward the bypass opening 8 travels straight as shown by C ₁ on the side where the back pressure generating plate 10 is not present, but
On the side where there is, the flow collides with the closed part 11, and becomes an inward flow as shown by _D1 .

In the case of FIG. 2, the back pressure generating plate 10 is in close contact with the sharp constriction portion 5 and almost closes the bypass opening 8 at the position where the back pressure generating plate 10 is present, so that the flow D ₁ is rapidly flowing. Contraction occurs in the constriction section 5. The sharp constriction part 5 generates a contraction flow E ₁ even on the side where the back pressure generating plate 10 is not present, but since the flow contraction effect is large with the flow D ₁ , the flow B ₁ is greatly inclined to the left.
At the exit of the circular nozzle 6 a deflected stream G ₁ is produced.
This flow G ₁ adheres to the arc-shaped guide wall, is further deflected, and has an angle θ ₁ with respect to the straight direction.
Let it be _H1 .

On the other hand, the flow of C ₁ toward the bypass opening 8 is caused by the shape of the annular wall 18 inside the annular chamber 20.
It is deflected and flows out from the bypass outlet ₂₁ as a horizontal flow I1.

Next, a case where the shaft 14 is moved slightly upward and the distance between the back pressure generating plate 10 and the bypass opening 8 is made slightly longer (clearance=h ₂ ) will be explained with reference to FIG. A part of the flow _A2 flowing in from upstream is
From the circular nozzle 6, the remainder flows out through the bypass opening 8. Considering the flow inside the inlet section 2, the flow near the center of the flow toward the circular nozzle 6 is
B Go straight like ₂ . On the other hand, the flow toward the bypass opening 8 is on the side where the back pressure generating plate 10 is not present.
It moves straight as shown in C ₂ , but on the side where the back pressure generating plate 10 is present, the flow collides with the closing part 11,
The flow is inward as shown in D ₂ . this flow
Due to D ₂ , the straight flow B ₂ is deflected to the left, but in this case, the back pressure generating plate 10 is located slightly upstream of the sharp constriction portion 5.
Before flowing into the circular nozzle 6, the back pressure generating plate 10
Influenced by the contraction flow E ₂ at the sharp constriction portion 5 on the side where no flow exists, the leftward deflection effect of the flow D ₂ is slightly suppressed. The existence of clearance h ₂ means that a part of the flow toward the circular nozzle 6 becomes flow F ₂ .
This will also occur towards the bypass opening 8,
The existence of this flow also somewhat suppresses the leftward deflection effect due to flow _D2 .

As a result, the flow _G2 passing through the circular nozzle 6 is
The flow is more circular than G ₁ in Figure 2.
Therefore, the adhesion effect of the flow G ₂ on the guide wall 9 becomes weaker, and the final flow H ₂ also has a smaller deflection angle than the flow H ₁ in FIG. 2 (θ ₁ >
θ ₂ ) state. Most of the flow C ₂ heading towards the bypass opening 8 is deflected in the annular chamber 20 in accordance with the shape of the annular wall 18 and flows out from the bypass outlet 21 as a horizontal flow I ₂ . Furthermore, in this case, the flow F ₂ passing through the clearance h ₂ also flows out in the horizontal direction as a flow J ₂ .

Next, a case where the shaft 14 is further moved upward and the distance between the back pressure generating plate 10 and the bypass opening 8 is further increased (clearance=h ₃ ) will be described with reference to FIG. A portion of the flow A ₃ flowing in from upstream flows through the circular nozzle 6, and the rest flows through the bypass opening 8.
More leakage. When considering the flow within the inlet section 2, among the flows toward the circular nozzle 6, the flow near the center travels straight as shown by _B3 . On the other hand, the flow toward the bypass opening 8 travels straight as indicated by C ₃ on the side where the back pressure generation plate 10 is not present, but on the side where the back pressure generation plate 10 is present, the flow collides with the closing portion 11, resulting in the flow at D ₃ . The flow is inward. Due to this flow D ₃ , the straight flow B ₃ is deflected to the left, but in this case, the back pressure generating plate 10 is located far upstream of the sharp constriction portion 5 , so the circular nozzle 6 Before it flows in, it is greatly influenced by the contraction flow E ₃ at the sharp constriction portion 5 on the side where the back pressure generation plate 10 is not present, and the leftward deflection effect of the flow D ₃ is suppressed. The presence of the clearance h ₃ means that a significant portion of the flow towards the circular nozzle 6 is directed to the flow F ₃
The presence of this flow also suppresses the leftward deflection effect due to flow _D3 .

This concentration, the flow _G3 that passed through the circular nozzle 6, is
The flow becomes a straight flow that is not deflected in any direction, and flows out as a straight flow _H3 without adhering to the guide wall 9. Flows C ₃ and F ₃ toward the bypass opening 8 are:
It is deflected in the annular chamber 20 according to the shape of the annular wall 18 and flows out from the bypass outlet 21 as horizontal flows I ₃ and J ₃ .

FIG. 9 shows the back pressure generating plate 10 and the bypass opening 8.
The back pressure generating plate 10 is rotated 180° around the shaft 14 from the state shown in FIG. 2 with the two in close contact with each other. This flow direction control device 1 has an axially symmetrical shape except for the back pressure generating plate 10, so that the flow state is completely symmetrical to the state shown in FIG. 2.

As shown above, the deflection of the flow flowing out from the circular nozzle 6 is caused by the back pressure generation plate 10 and the bypass opening 8.
By changing the distance between the guide wall 9 and the guide wall 9, the adhesion effect of the flow to the guide wall 9 is controlled, and it becomes possible to deflect the flow in any direction from straight to wide-angle deflection within the two-dimensional cross-sectional view. Further, since this flow direction control device is formed axially symmetrically, by rotating the back pressure generating plate 10 around the axis 14, it is possible to deflect the flow direction in any three-dimensional direction.

In any of these deflection states, this configuration always allows outflow from the bypass outlet 21, so deflection of the flow from the circular nozzle in any direction is achieved with little airflow resistance.

Next, a second embodiment of the present invention will be described with reference to FIGS. 10 and 11.

FIG. 10 shows a back pressure generating plate 10 similar to that shown in FIG. 6.
The difference is that an overflow prevention wall 22 is provided around the closure part 11. All other details are the same as in Figure 6.

Next, we will discuss the operation.

When such a back pressure generating plate 10 is used, for example, in FIG. 11 where the back pressure generating plate 10 is set at the same position as in FIG. 2, the flow corresponding to D ₁ in FIG. In this case, the flow does not overflow from the closure part 11 in the circumferential direction, but becomes a highly directional flow, which is effectively biased by the deflection of the flow _B5 . As a result,
Flow G ₅ is deflected more to the left, resulting in a final flow H ₅
The flow is also in a more deflected state (θ ₅ >θ ₁ ) than the flow H ₁ in FIG. 2.

In this manner, by providing the overflow prevention wall in the closing portion 11, the flow that oddly affects the deflection becomes more effective, and a wider angle of deflection is achieved.

Effects of the Invention As described above, according to the present invention, not only can the blowout flow from the circular nozzle be deflected in any direction, but also a bypass flow can be generated, so that the blowout can reduce the airflow resistance. Can be configured.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a flow direction control device showing an embodiment of the present invention, Fig. 2 is a vertical sectional view thereof, Fig. 3 is a sectional view taken along line A-A' in Fig. Figure 5 is a view taken from the direction of line B-B' in Figure 2, and Figure 5 is C in Figure 2.
-C' line direction, Figure 6 is a perspective view of the back pressure generating plate, Figures 7, 8, and 9 are vertical sectional views showing different flow states, and Figure 10 is a perspective view of the back pressure generating plate. FIG. 2 is a perspective view of the back pressure generating plate in the embodiment, and FIG. 11 is a vertical sectional view showing the flow state. 1... Flow direction control device, 2... Inlet section, 3...
...Exit part, 5...Sudden constriction part, 6...Circular nozzle, 8...Bypass opening, 9...Guide wall, 10...
... Back pressure generation plate, 11 ... Closing part, 21 ... Bypass outlet, 22 ... Overflow prevention wall.

Claims (1)

[Claims] 1. A circular nozzle having an inlet and an outlet, the outlet having a sharp constriction, and a bypass opening located on the outer periphery of this nozzle, and downstream of the nozzle, A guide wall having a shape in which the width of the flow path gradually increases toward the downstream side is provided, and on the upstream side of the bypass opening, a part of the flow to the bypass opening is blocked near the circular nozzle, and the flow through the circular nozzle is deflected. Therefore, a back pressure generating plate is provided, and by moving this back pressure generating plate, the adhesion effect of the flow blown out from the nors to the guide wall is controlled. A flow direction control device equipped with an air outlet. 2. The flow direction control device according to claim 1, characterized in that an overflow prevention wall is provided at the closing portion of the back pressure generating plate.