Plenum chamber capable of achieving balanced ventilation

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

Active Publication Date: 2016-05-04
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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  • Plenum chamber capable of achieving balanced ventilation
  • Plenum chamber capable of achieving balanced ventilation
  • Plenum chamber capable of achieving balanced ventilation

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 w...

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Abstract

The invention discloses a plenum chamber capable of achieving balanced ventilation, comprising a chamber body, wherein an air inlet hole is formed in the lateral wall of the chamber body, a pore plate and a clapboard are arranged in the chamber body, a plurality of orifices are formed in the pore plate, the pore plate and the clapboard divide the internal space of the chamber body into three areas, including an air inlet area, a first turbulence area and a second turbulence area; the air inlet hole is formed in the lateral wall of the air inlet area, a vertical air outlet hole is formed in the lateral wall of the first turbulence area, a horizontal air outlet hole is formed in the lateral wall of the second turbulence area; and air enters the air inlet area via the air inlet hole, respectively enters the first turbulence area and the second turbulence are via the pore plate and are respectively sent out from the vertical air outlet hole and the horizontal air outlet hole. According to the invention, wall-attached jetting uniformity in the horizontal direction and the vertical direction can be improved, the capability of outlet airflow in mixing with indoor pollution (hot air) is weakened, and air sending jetting distance is increased, and blowing feeling of sending airflow to persons is reduced.

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 Applications(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
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