JPH0966735A - Whistle noise prevention structure for air-conditioning register - Google Patents

Abstract

(57) 【Abstract】 PROBLEM TO BE SOLVED: To divide a two-dimensional vortex even if a two-dimensional vortex having a vortex parallel to the edge is generated due to flow separation from the upper edge of the damper seal. It is possible to prevent the generation of whistling noise. SOLUTION: In a flow direction of air passing through a gap t1 in which a damper seal 50a and an upper wall 42a of a retainer 42 which are closed in a rearward inclination with respect to an air flow F of a damper 49 are not completely closed. On the other hand, with respect to the two-dimensional vortex 11 having a vortex thread parallel to the edge of the damper seal generated by being separated from the upper edge of the right angle damper seal, on the lower surface side of the upper wall of the retainer, In the width direction at a predetermined position between the barrel and the position where the upper edge of the damper seal of the damper contacts the upper wall,
Divide a two-dimensional vortex, and divide the divided vortex into a three-dimensional vortex
A vortex dividing means 55 that can be transformed into 19 is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air-conditioning register, and more particularly to a structure for preventing whistling noise by an air-conditioning damper.

[0002]

2. Description of the Related Art Conventionally, in this type of air-conditioning register 1, as shown in FIG. 7, a barrel 4 is attached to a blower outlet 3 side of a substantially rectangular tubular retainer 2 so as to be vertically rotatable. A plurality of horizontal blades 5 are horizontally attached to the front portion of the barrel 4 at a predetermined interval, and a plurality of vertical blades 6 are rotatable on the upstream side of the horizontal blade 5 via shafts 6a and 6b. The vertical blades 6 are connected to each other via link bars 7. The barrel 4 provided in this way is provided so as to rotate up and down to change the wind direction, and further, by operating the vertical blade 6 by the knob 8 in the left and right direction, the wind direction in the left and right direction is changed. On the upstream side of the barrel 4, a damper 9 having damper seals 10 attached to the four circumferences is provided with a damper opening / closing mechanism (not shown) via a damper shaft 11 so that the opening / closing angle of the damper 9 is horizontal with respect to the flow F of air and the air is opened. It is rotatably attached to a closed position in which the flow F is closed rearwardly so as to adjust the air flow rate.

In the register 1 thus formed, when the damper 9 is rotated to the closed position side via the damper opening / closing mechanism and the damper 9 is located at the illustrated position where the ventilation passage of the retainer 2 is not completely closed. , The upper edge 1 of the damper seal 10
On the 0a side, a gap t1 is formed in an acute angle with the upper wall 2a of the retainer 2.
Since the lower edge 10b side is positioned with an acute angle gap t2 to the lower wall 2b, most of the flow F of the air blown from the upstream side is the damper. The flow velocity of the air which is guided by 9 and flows through the gap t1 increases.
When air flows through this gap t1, a two-dimensional structure having a vortex 12 parallel to the edge of the upper edge 10a of the damper seal 10 as shown in FIG. 8 due to the separation of the flow from the edge of the upper edge 10a of the damper seal 10. A vortex 11 is generated, and the two-dimensional vortex 11 interferes with the horizontal link bar 7 parallel to the vortex filament 12 of the vortex 11 located downstream and the upper edge of the barrel 4, and produces a strange noise (whistle sound). ) Was occurring.

In order to reduce the whistling noise by suppressing the generation of the two-dimensional vortex having the vortex filament 12 parallel to the edge of the upper edge 10a of the damper seal 10 generated by the damper 9, the whistle blowing sound is reduced. There is a 3-26844 (Kaikaihei 4-123709 publication). What is disclosed in this publication is shown in FIG.
To the upper edge 10 of the damper seal 10 as shown in FIG.
a and a two-dimensional vortex 11 having a vortex thread 12 parallel to the edge generated by separating from the edge of the upper edge 10a by a flow of air passing through a gap t1 between the retainer 2 and the upper wall 2a. It is intended to suppress the development of the two-dimensional vortex 11 and reduce the whistle blowing sound by additionally providing the vortex generating means capable of generating the three-dimensional vortex 19 having the various vortex filaments 19a. As a means for generating the original vortex 19, a bifurcated grip portion 16 for gripping the damper seal 10 is formed on the four circumferences of the damper 15, as shown in FIG.
On the gripping edge 16a of the retainer 2 on the side of the upper wall 2a, convex portions 17 having a substantially rectangular shape with the same thickness as the gripping edge 16a are formed at predetermined intervals. A groove portion 18 is formed between the convex portions 17 by the left and right end surfaces 17 a and the damper seal 10.

When the damper 15 formed in this way is positioned at an opening having a gap t1 that does not completely close the ventilation passage of the retainer 2, the air flow F is guided along the damper 15 toward the gap t1. , The vortex filament 12 parallel to the upper edge 10a of the damper seal 10 due to the separation of the flow from the edge.
Although a two-dimensional vortex 11 having the shape of the air flow F is about to be generated, this air flow F passes through the groove portion 18 between the convex portions 17 formed on the gripping edge 16a, and therefore, as shown in FIG. At this time, the three-dimensional vortex 19 having the vortex filament 19a perpendicular to the vortex filament 12 of the two-dimensional vortex 11 is generated due to the separation of the flow from the left and right end surfaces 17a of the convex portion 17, and the two-dimensional vortex The configuration is such that the development of the vortex 11 is suppressed and the whistling sound is significantly reduced.

Further, as a vortex generating means for the three-dimensional vortex 19, in the publication, a plurality of ribs 21 are arranged in parallel on the plate surface of the damper 20 at a predetermined interval in the air flow F as shown in FIG. As a configuration in which the groove portion 22 is formed between the ribs 21,
When the air flow F passes through the gap t1 from the groove 22, air is separated from the end surface 21a of the rib 21, and the flow is separated from the edge of the upper edge 10a of the damper seal 10, so that the vortex 12 is parallel to the edge. For the two-dimensional vortex 11, a three-dimensional vortex 19 having a vortex 19a perpendicular to the vortex 12 is generated. As another means, as shown in FIG. 12, a plurality of ribs 25 are arranged in parallel in the air flow F on the upstream side of the damper closing position of the upper wall 2a of the retainer 2 to form the ribs 25.
A groove portion 26 is formed between them, and when passing through the groove portion 26, a three-dimensional vortex 19 is generated by separation of the flow from the end surface 25a of the rib 25.

[0007]

However, all of the vortex generating means for the three-dimensional vortex 19 disclosed in this publication are located upstream of the edge position of the damper seal 10 in which the two-dimensional vortex 11 is generated. Although the development of the two-dimensional vortex 11 is suppressed, the change in wind speed and the dampers 9 and 20 are suppressed.
Due to a state in which is not completely closed (state in FIG. 7) or the like, the two-dimensional vortex cannot be sufficiently suppressed and a whistling sound may be generated. The present invention has been made in order to solve the above problems, and the damper is positioned at an opening having a gap that does not completely close the ventilation passage of the retainer, and the flow is separated from the edge of the upper edge of the damper seal. Even if a two-dimensional vortex having a vortex parallel to the same edge is generated, the whistle noise prevention structure of an air-conditioning register can be provided to divide the two-dimensional vortex and prevent the generation of a whistle noise. That is the purpose.

[0008]

SUMMARY OF THE INVENTION In order to solve the above technical problems, the present invention mounts a barrel equipped with a horizontal blade and a vertical blade on the outlet side of a retainer, and the retainer ventilation passage is provided on the upstream side of the barrel. In the air-conditioning register consisting of a damper that is openably and closably attached, the damper closes in a rearward inclination with respect to the flow of air, and a gap is not completely closed between the damper seal above the retainer and the retainer upper wall. For the two-dimensional vortex having a vortex parallel to the edge of the damper seal generated by separating from the edge of the upper edge of the damper seal that is perpendicular to the flow direction of the passing air, On the lower surface side of the wall, in the width direction of a predetermined position between the barrel and the position where the upper edge of the damper seal of the damper contacts the upper wall, the two-dimensional vortex is divided, and the divided vortex is Three-dimensional vortex The vortex-breaking means is arranged so that it can be transformed, and the vortex-breaking means divides the two-dimensional vortex into front surfaces and the left and right side surfaces that transform the divided vortex into three-dimensional vortices The two-dimensional vortex generated by the separation of the flow from the upper edge of the damper seal is distributed to the downstream side because it is composed of multiple ribs such as rectangular parallelepiped shape, rectangular cone shape, and plate shape. It is divided by colliding with a dividing means such as a plurality of ribs provided, and the divided vortex flows along the side surface between the dividing means, and when separated from the edge of this side surface, it is three-dimensional. It prevents the generation of whistling sounds by being transformed into a whirlpool.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a sectional view of an air-conditioning register 41. The register 41 has a substantially rectangular tubular retainer 42, which is similar to the conventional one. A barrel 44 is attached to the outlet 43 side of the barrel so as to be rotatable in the vertical direction, and a plurality of horizontal blades 45 are horizontally attached at a predetermined interval to the front portion of the barrel 44. On the upstream side, a plurality of vertical blades 46 are rotatably attached via shafts 46a and 46b, and each vertical blade 46 is connected via a link bar 47. Barrel 4 provided in this way
4 rotates up and down to change the wind direction, and knob 48
Is provided so as to change the wind direction in the left-right direction by operating the vertical blade 46 in the left-right direction.
On the upstream side of 4, a damper 49 having damper seals 50 mounted on the four circumferences is provided with a damper opening / closing mechanism (not shown) via a damper shaft 51 so that the opening / closing angle of the damper 49 is horizontal with respect to the air flow F. It is rotatably attached to a closed position where it is closed rearwardly with respect to F so as to adjust the air flow rate.

A damper 49 is attached to the retainer 42 of the register 41 thus provided, and a ventilation passage 52 of the retainer 42 is provided.
Is positioned at an opening having a clearance t1 that does not completely close the two-dimensional vortex 11 having a vortex filament 12 parallel to the edge generated by the flow separation from the edge of the upper edge 50a of the damper seal 50. Multiple ribs 55 as means
Are arranged.

As shown in FIG. 1, the rib 55 is on the lower surface side of the upper wall 42a of the retainer 42, and the upper edge 50a of the damper seal 50 in the state where the ventilation passage 52 is closed by the barrel 44 and the damper 49 is formed. The rib 55 is provided in a width direction at a predetermined position between the rib 55 and the position where it abuts on the upper wall 42a. As shown in FIG.
Front part 55 of a predetermined length 1 (for example, 5 to 10 mm)
It is formed in a rectangular parallelepiped shape having a and left and right side surfaces 55b and is parallel to the air flow F at a predetermined interval p (for example, 6
mm), and a groove 55c is provided between the ribs 55.

As described above, the plurality of ribs 55 are provided on the retainer 42.
On the upper wall 42a side, the upper edge 50a of the damper seal 50 in the state where the ventilation passage 52 is closed by the barrel 44 and the damper 49 is aligned in the width direction at a predetermined position. As shown in FIG. 3, the damper 49 is positioned at an opening having a clearance t1 that does not completely close the ventilation passage 52 of the retainer 42 and flows from the edge of the upper edge 50a of the damper seal 50. Two-dimensional vortex 1 having vortex filaments 12 parallel to the edges generated by the separation of the
The first vortex tube hits the front surface portion 55a of the plurality of ribs 55 arranged on the lower surface of the upper wall 42a of the retainer 42. This collision produces some noise. And this two-dimensional vortex 11
In the process of moving to the downstream side, it is divided by the ridgeline 55d formed by the front surface portion 55a of each rib 55 and the left and right side surface portions 55b, and the divided vortex flows along the left and right side surface portions 55b, and When separated from the edge of the side surface portion 55b to the left and right, the two-dimensional vortex 11 is transformed into a three-dimensional vortex 19 having a vortex 19a orthogonal to the vortex tube and flows downstream. When the three-dimensional vortex 19 is formed, the accelerating motion of the vortex is suppressed, and even if the vortex collides with the edge of the barrel 44 located on the downstream side, the whistle sound having a specific frequency of pee is prevented from being generated. can do.

Thus, the damper seal 50 of the damper 49 is
The vortex tube of the two-dimensional vortex 11 generated from the separation of the flow from the edge of the upper edge 50a is divided by colliding with a plurality of ribs 55 arranged on the downstream side, and the divided vortex is further separated. Flows between the ribs 55 along the side surface portion 55b, and when separated from the edge of the side surface portion 55b, the three-dimensional vortex 19
It is possible to prevent the generation of whistling sound by being transformed into.

It is effective that the front surface 55a of the rib 55 is a vertical surface with respect to the vortex tube of the two-dimensional vortex 11, and the overall noise is increased, but only the whistling sound is produced. Considering this, it is desirable that the left and right ridgelines 55d of the front surface 55a be sharp.

The upper edge 50a of the damper seal 50
Two-dimensional vortex generated from separation of flow from the edge of
A plurality of rib shapes as means for dividing the vortex tube of FIG.
The configuration shown in FIG. 5 may be used. That is, the rib 56 shown in FIG. 4 has a rectangular cross-section and has a front surface 56a.
Is formed with a width w1 (for example, 1 mm) and a height h (3 mm),
The downstream bottom surface side is formed to have a width w2 (for example, 3 mm) and a length l (for example, 3 to 10 mm), and the left and right side surface portions 56b are provided in a widened shape at a predetermined angle toward the downstream side. Are arranged at a predetermined interval p (for example, 6 mm). In the rib 56 provided in this way, since the area of the front surface portion 56a is small, the effect of dividing the vortex tube of the two-dimensional vortex 11 is reduced, but there is an advantage that ventilation resistance (pressure loss) is small.

The rib 57 shown in FIG. 5 is plate-shaped, and the rib 57 has a thickness t (for example, 1 mm) and a height h.
(For example 5 mm), length 1 (for example 5-10 mm) and interval p
R faces are attached to the three faces (for example, 3 mm) and the thickness t. In the rib 57 thus provided, the vortex tube of the two-dimensional vortex 11 can be divided, the ventilation resistance can be reduced and the wind noise can be prevented, and the divided vortex can be stirred.

Although the above-mentioned ribs 55, 56, 57 are illustrated as being integrally formed on the lower surface of the upper wall 42a of the retainer 42, the present invention is not limited to this and, for example, as shown in FIG. 42 ribs 55, 56, 57 of 42
The window portion 58 is opened in the portion where the ribs 5 are arranged, and a detachable lid member 59 is provided on the window portion 58.
The configuration may be such that 5, 56 and 57 are integrally formed.

[0018]

As described above, according to the present invention, the two-dimensional vortex tube of the two-dimensional vortex generated from the separation of the flow due to the upper edge of the damper seal is arranged on the downstream side. It is divided by colliding with dividing means such as ribs, and further, the divided vortex flows along the side surface between the dividing means, and when it separates from the edge of this side surface, it is transformed into a three-dimensional vortex. By doing so, it is possible to prevent the whistling sound from being generated.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of an air conditioning resister.

FIG. 2 is a perspective view from the lower surface side of the vortex dividing means formed on the upper wall of the retainer.

FIG. 3 is an explanatory view of the operation of the dividing means.

FIG. 4 is a perspective view of another cutting means.

FIG. 5 is a perspective view of another cutting means.

FIG. 6 is a perspective view of another configuration of the cutting means.

FIG. 7 is a cross-sectional view of a conventional air conditioning resister.

FIG. 8 is an explanatory diagram of two-dimensional vortex generation when the damper is not completely closed.

FIG. 9 is a plan view of a damper for preventing two-dimensional vortex generation.

FIG. 10 is an explanatory diagram of generation of a three-dimensional vortex with respect to a two-dimensional vortex.

FIG. 11 is a perspective view of a damper provided with a means for generating a three-dimensional vortex.

FIG. 12 is a sectional view of a retainer similarly provided with means for generating a three-dimensional vortex.

[Explanation of symbols]

 11 Two-dimensional vortex 12 Two-dimensional vortex vortex 19 Three-dimensional vortex 19a Three-dimensional vortex vortex 41 Air conditioning register 42 Retainer 42a Upper wall 44 Barrel 45 Horizontal blade 46 Vertical blade 49 Damper 50 Damper seal 55, 56, 57 rib (dividing means)

Claims (2)

[Claims] 1. An air conditioning register comprising a barrel equipped with a horizontal blade and a vertical blade on the outlet side of the retainer, and a damper installed on the upstream side of the barrel so that the ventilation passage of the retainer can be opened and closed. With respect to the flow of air, the damper seals in a right angle with respect to the flow direction of the air passing through the gap in which the damper seals backwardly and is not completely closed with the upper damper seal and the upper wall of the retainer. On the lower surface side of the upper wall of the retainer, above the damper seal of the barrel and the damper, with respect to a two-dimensional vortex having a vortex parallel to the edge of the damper seal generated by separating from the edge of the upper edge. Arranged in the width direction of a predetermined position between the position where the edge abuts the upper wall, the vortex dividing means that divides the two-dimensional vortex and can transform the divided vortex into a three-dimensional vortex. Special feature A structure to prevent whistling noise from the air-conditioning register. 2. The vortex dividing means has a rectangular parallelepiped shape, a rectangular parallelepiped shape, and a plate having a front surface portion that divides a two-dimensional vortex and left and right side surfaces that transform the divided vortex into a three-dimensional vortex. The whistle noise prevention structure for an air-conditioning register according to claim 1, wherein the structure is constituted by a plurality of ribs having different shapes.