CN108954643B - Airflow adjusting device for ventilation pipeline system - Google Patents

Abstract

The invention relates to an airflow adjusting device for a ventilation pipeline system, which comprises a first pipeline (1), a second pipeline (2) and blades (3), wherein the first pipeline and the second pipeline are arranged vertically, a diagonal line (4) is arranged at a corner where the first pipeline and the second pipeline are connected, a row of a plurality of blades (3) are arranged along the diagonal line, the plurality of blades are positioned in the corner where the first pipeline and the second pipeline are connected, the row of the plurality of blades (3) is arranged vertically to the diagonal line, and the diagonal line and the horizontal line have an included angle a, and the airflow adjusting device is characterized in that: a row of a plurality of blades (3) is bilaterally symmetrical about the middle blade, different distances are reserved among the blades, the distance between the middle area is large, and the distance between the two side areas is small. Turbulence at corners can be reduced, and the flow of a middle area can be increased; the flow guide effect is good, the vortex at the downstream end of the blade is reduced, and the uniformity of airflow is improved.

Description

An air flow regulating device for a ventilation duct system

technical field

The present invention relates to the field of ventilation systems, in particular to an air flow adjustment device for a ventilation duct system.

Background technique

Air flow adjustment devices are usually used at the corners of the ventilation duct system, such as arranging guide vanes. The existing airflow adjustment devices have the problems of turbulent airflow at the corners, small flow, and eddy currents at the downstream ends of the blades.

SUMMARY OF THE INVENTION

The purpose of the present invention is to overcome the deficiencies in the prior art and provide an air flow adjustment device for a ventilation duct system, which can reduce turbulence at the corners and increase the flow in the middle area; The vortex at the downstream end of the blade improves the uniformity of the airflow.

In order to achieve the above object, the technical scheme adopted in the present invention is:

An air flow adjustment device for a ventilation duct system, comprising a first duct (1), a second duct (2), and blades (3), the first duct and the second duct are vertically arranged, and the corners where they are connected have a On the diagonal line (4), a row of a plurality of blades (3) is arranged along the diagonal line, and the plurality of blades are located in the corner where the first pipe and the second pipe are connected. The diagonal line is vertically arranged, and the diagonal line and the horizontal line have an included angle a, which is characterized in that: a row of a plurality of blades (3) is left-right symmetrical with respect to the middle blade thereof, and each blade of the plurality of blades has different spacings, and the spacing between the middle areas is Large, the distance between the two areas is small.

The blades near the middle area have a distance x, the blades near the end areas on both sides have a distance z, and the blades between the middle area and the end areas have a distance y, and x>y>z.

The plurality of vanes include a vane body (5) and a flow guide arc portion (6), and the flow guide arc portion is located at the downstream end of the vane body.

The blade has a first blade surface (8) and a second blade surface (9), and a plurality of elongated guide grooves (7) are provided on one side of the first blade surface of the blade body.

The included angle between the diagonal line and the horizontal line is a=15-20°, and the included angle between the blade and the vertical line is b=15-20°.

The guide arc part and the long guide groove are located on the same blade surface of the blade (3).

The airflow adjustment device for the ventilation duct system of the present invention can reduce the turbulent flow at the corners and increase the flow rate in the middle area through the blade arrangement structure; the blade structure design can play a good flow guiding effect and reduce the eddy current at the downstream end of the blade, Improve airflow uniformity.

Description of drawings

Fig. 1 is the structural representation of the air flow regulating device of the present invention;

Figure 2 is a schematic diagram of the blade structure of the present invention;

3 is a schematic diagram of the blade structure of the present invention;

FIG. 4 is a schematic diagram of the cross-sectional structure of the diversion groove of the present invention.

In the figure: the first pipe 1, the second pipe 2, the blade 3, the diagonal line 4, the blade body 5, the guide arc part 6, the guide groove 7, the first blade surface 8, the second blade surface 9, f1 first flow direction, f2 second flow direction, f air flow.

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings.

Referring to Figures 1-4 : the airflow adjustment device includes a first duct 1 , a second duct 2 , a vane 3 , a vane body 5 , a guide arc portion 6 , and a guide groove 7 .

The first pipe 1 and the second pipe 2 are arranged vertically, and there is a diagonal line 4 at the corner where they are connected. A row of a plurality of blades 3 is arranged along the diagonal line 4. In the corner where the pipes 2 are connected, a row of a plurality of blades 3 is arranged perpendicular to the diagonal line 4 .

The angle a=15-20° between the diagonal line 4 and the horizontal line, preferably 18°; the angle b=15-20° between the blade 3 and the vertical line, preferably 18°; each blade of a row of multiple blades 3 There are different distances between them, the distance between the middle area is large, and the distance between the two sides is small. A row of multiple blades 3 is symmetrical about the middle blade, the blades near the middle area have a distance x, and the blades near the end areas on both sides have a distance z. , the blades located between the middle area and the end area have a spacing y, x>y>z, and x=6R, y=5R, z=4R, and R is the scaling factor. This blade arrangement can reduce turbulence at the corners and increase the flow in the middle area.

The plurality of blades 3 include a blade body 5 and a guide arc part 6, the guide arc part 6 is located at the downstream end of the blade body 5, and the guide arc part 6 is integrally formed with the blade body 5; the blade 3 has a first blade surface 8 , the second blade surface 9, the end of the guide arc part 6 away from the blade body 5 is provided with a smaller arc transition part relative to the arc of the guide arc part body, the first blade surface 8 of the blade body 5 One side is provided with a plurality of elongated diversion grooves 7, the upstream and downstream ends of the plurality of elongated diversion grooves 7 have inclined sections, and the cross-sectional shape of the diversion groove 7 is an isosceles trapezoid. The bottom is located on the first blade face 8 . This blade structure design can play a good guiding effect, reduce the vortex at the downstream end of the blade, and improve the uniformity of the air flow.

The airflow adjustment device for the ventilation duct system of the present invention can reduce the turbulent flow at the corners and increase the flow rate in the middle area through the blade arrangement structure; the blade structure design can play a good flow guiding effect and reduce the eddy current at the downstream end of the blade, Improve airflow uniformity.

The above-mentioned embodiment is an illustration of the present invention, not a limitation of the present invention. Any structure after simple transformation of the present invention belongs to the protection scope of the present invention.

Claims (4)

1. An air conditioning device for a ventilation duct system, comprising a first duct (1), a second duct (2), and a blade (3), wherein the first duct and the second duct are vertically arranged, and the corners where they are connected There is a diagonal line (4) along the diagonal line, and a row of a plurality of blades (3) is arranged along the diagonal line, and the plurality of blades are located in the corner where the first pipe and the second pipe are connected. It is arranged perpendicular to the diagonal line, and the diagonal line and the horizontal line have an included angle a, and it is characterized in that: a row of a plurality of blades (3) is left-right symmetrical with respect to the middle blade, and each blade of the plurality of blades has different spacings, and the middle The area spacing is large, and the spacing between the two sides is small; the blades near the middle area have a spacing x, the blades near the end areas on both sides have a spacing z, and the blades located between the middle area and the end area have a spacing y, and x>y> z; the plurality of blades include a blade body (5) and a flow guide arc portion (6), the flow guide arc portion is located at the downstream end of the blade body, and the blades have a first blade surface (8) and a second blade surface (9) A plurality of elongated guide grooves (7) are provided on one side of the first blade surface of the blade body. 2. The air conditioning device for a ventilation duct system according to claim 1, wherein the angle a=15-20° between the diagonal line and the horizontal line, and the angle b= between the blade and the vertical line 15-20°. 3 . The air flow adjustment device for a ventilation duct system according to claim 1 , wherein the guide arc part and the long guide groove are located on the same blade surface of the blade ( 3 ). 4 . 4 . The air conditioning device for a ventilation duct system according to claim 1 , wherein the upstream end and the downstream end of the plurality of elongated guide grooves ( 7 ) both have inclined sections, and the long The cross-sectional shape of the strip guide groove is an isosceles trapezoid, and the long base of the isosceles trapezoid is located on the first blade surface (8).

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