Gas concentration diffuse flow field device

Abstract

The present invention relates to a gas strength diffuse flow field device which consists of a box body, an air inlet pipe, a flow guide cylinder, a left metal pore plate, a right metal pore plate and an exhaust pipe. The box body is a metal casing containing other articles. The air inlet pipe, the flow guide cylinder, the left metal pore plate, the right metal pore plate and the exhaust pipe are arranged in the box body by welding. The air inlet pipe is arranged at the left side in the box body after being welded with the flow guide cylinder and forms a diffuse area with the left metal pore plate. The exhaust pipe is arranged at the right side in the box body after being welded with the flow guide cylinder and forms a collecting area with the right metal pore plate. A working area is formed between the left metal pore plate and the right metal pore plate. The flow guide cylinder is a square box body, the upper end of which is closed, and the lower end is provided with a circular opening which is communicated and welded with the air inlet pipe and the exhaust pipe. One side of the box body is open, and a plate at the other side is provided with a plurality of pores which are communicated with the left metal pore plate and the right metal pore plate. The gas strength diffuse flow field device has simple structure, is easy for processing, does not have dead angle of gas strength diffusion and can obtain a wide range gas flow field with uniform strength.

Description

(1) Technical field: [0001] The invention provides a gas concentration diffusion flow field device, which relates to a gas concentration diffusion flow field structure, in particular to a gas concentration diffusion flow field device for an experimental box with gas input and output channels. It belongs to the technical field of laboratory airflow equipment. (two) background technology: [0002] The gas flow field in the gas temperature calibration test box with gas input and output channels and the temperature and humidity calibration test box is essentially a gas concentration diffusion flow field. refer to figure 1 , a traditional experimental box 1' with gas input and output channels is composed of an inlet pipe 2', a diffusion area 7', a working area 8', a collection area 9', and an exhaust pipe 4'. The experimental gas enters from the intake pipe, diffuses through the diffusion area and then enters the working area. After flowing through the collection area, the gas ...

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Problems solved by technology

[0004] 1. The bell-shaped diffusion area and collection area are adopted. When the cross-sectional area difference between the intake pipe and the working area is too large, the experimental gas will not diffuse sufficiently in the diffusion area and cannot be evenly distributed in the working area, especially when the gas flow rate is low. When the laminar flow state is present, the experimental gas flows out at a small expansion angle, which cannot meet the uniformity requirements of the gas concentration;

[0005] 2. Since the bell-shaped diffusion area and collection area are not easy to process, and this structure requires a long box body, it is not conducive to the design of the pressure-bearing structure of the gas;

[0006] 3. The overall linear flow of gas is not conducive to concentration diffusion, and there is a large range of dead zones in the space near the box wall in the working area

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