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A static pressure box for uniform air supply

A static pressure box and uniform technology, applied in the direction of pipeline layout, can solve the problems of uneven air flow, disordered air flow organization, low air uniformity, etc., and achieve the effect of increasing the distance of the air supply jet, weakening the mixing ability, and improving the uniformity

Active Publication Date: 2018-05-04
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, although the current traditional static pressure box can achieve better noise reduction effect and realize multiple air outlets, it still faces problems such as poor airflow stabilization effect and low uniformity of air transmitted to the room during actual operation. Wind uniformity still less than ideal
The lower the uniformity of the air supply airflow, the stronger the mixing ability between the air outlet and indoor polluted (hot) air, making it difficult for fresh (cold) air to reach the personnel work area
On the other hand, since the pressure and velocity of the air sent into the plenum will gradually change with the depth of the airflow, the airflow sent out at different depths is uneven, which will lead to the disorder of the airflow organization in the indoor working area and affect the human body. comfort

Method used

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  • A static pressure box for uniform air supply
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  • A static pressure box for uniform air supply

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] The numerical calculation model of the plenum box is established according to the actual use conditions. The size of the plenum box shell is 1500×800×800mm in length×width×height; The porosity is 14.95%, such as figure 1 Shown; partition length × height is The upper edge coincides with the two orifice plate edges, and the lower edge coincides with the lower left corner of the static pressure box; the length of the vertical air outlet 11 and the horizontal air outlet 10 are both 1300 mm, and the width is 100 mm; the air inlet 9 is a round hole with a diameter of 200 mm. The wind speed at tuyere 9 is 4m / s, that is, the air intake is 450m 3 / h. It can be calculated from the above steps that the size of the orifice 7 decreases sequentially from the end of the air inlet 9, respectively 28.0mm, 28.0mm, 27.1mm, 26.2mm, 25.4mm, 24.6mm, 23.8mm, 23.0mm, 22.3mm mm, 21.6mm, 20.9mm, 20.0mm, the quantity distribution is as follows Figure 4 shown.

[0075] The box body 1, the h...

Embodiment 2

[0081] Others are identical with embodiment 1, and air inlet 9 wind speeds are 6m / s, and promptly air intake is 680m 3 / h. Figure 8 , 9 respectively represent the central axis velocity distribution of the plenum of the present invention and the horizontal air outlet 10 and the vertical air outlet 11 of the traditional plenum.

[0082] When the plenum box of the present invention is adopted, the maximum speed difference of the central axis of the horizontal air outlet 10 and the vertical air outlet 11 is 41.54% and 36.89% respectively; The maximum velocity differences of the central axis of the straight air outlet 11 are 97.81% and 68.74% respectively. Compared with the latter, the wind volatility of the former is respectively reduced by 135.48% and 86.35%.

[0083] In terms of the uniformity of air outlets from the horizontal air outlet 10 and the vertical air outlet 11, the unevenness of the horizontal air outlet 10 and the vertical air outlet 11 is respectively 9.20% and ...

Embodiment 3

[0085] Others are identical with embodiment 1, and air inlet 9 wind speeds are 8m / s, and promptly air intake is 900m 3 / h. Figure 10 , 11 respectively represent the central axis velocity distribution of the plenum of the present invention and the horizontal air outlet 10 and the vertical air outlet 11 of the traditional plenum.

[0086] When using the plenum box of the present invention, the maximum speed difference of the central axis of the horizontal air outlet 10 and the vertical air outlet 11 is 32.62% and 33.96% respectively; The maximum speed difference of the central axis of the vertical air outlet 11 is 82.96% and 95.93% respectively. Compared with the latter, the wind volatility of the former is respectively reduced by 154.36% and 182.48%.

[0087] In terms of the uniformity of air outlets from the horizontal air outlet 10 and the vertical air outlet 11, the unevenness of the horizontal air outlet 10 and the vertical air outlet 11 is 7.90% and 8.36%, respectively,...

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Abstract

The invention discloses a static pressure box for realizing uniform air supply, which comprises a box body, an air inlet is arranged on the side wall of the box body, an orifice plate and a partition are arranged inside the box body, a plurality of orifices are arranged on the orifice plate, and the hole The board and the partition divide the inner space of the box into three areas, namely the air inlet area, the first turbulent flow area and the second turbulent flow area; The side wall of the area is provided with a vertical air outlet, and the side wall of the second turbulent flow area is provided with a horizontal air outlet; the air enters the air inlet area from the air inlet, and enters the first turbulent area and the second turbulent area respectively through the orifice plate. In the turbulent flow area, it is sent out by the vertical air outlet and the horizontal air outlet respectively. The invention improves the uniformity of the attached jet in the horizontal direction and the vertical direction, weakens the mixing ability of the air outlet airflow and indoor pollution (hot air), increases the distance of the air supply jet flow, and reduces the blowing feeling of the air supply airflow on personnel.

Description

technical field [0001] The invention relates to a static pressure box, in particular to a static pressure box for realizing uniform air supply. Background technique [0002] As a device that converts dynamic pressure into static pressure, the static pressure box can stabilize the airflow and reduce the vibration of the airflow, while reducing the noise of the airflow, and acts as a universal joint. The static pressure box can change part of the dynamic pressure into static pressure, increase the air supply distance, and at the same time distribute the air volume evenly to ensure the uniformity of the air supply at the tuyere, so that the air supply effect is more ideal; the static pressure box is applied to the ventilation and air conditioning system, It can improve the comprehensive performance of the whole system. [0003] However, although the current traditional static pressure box can achieve better noise reduction effect and realize multiple air outlets, it still face...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F24F13/06
CPCF24F13/06
Inventor 李安桂杨长青任彤张静
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY