Double-layer-flow purification working table

Abstract

The invention relates to a double-layer-flow purification working table which comprises an air intake system and an air discharging system, wherein an air diffusion plate is arranged below the air intake system; a working chamber is arranged below the air diffusion plate; large holes are formed along the transverse direction on the front side of the air diffusion plate; small holes are formed along the transverse direction at other parts of the air diffusion plate; the air discharging system comprises an air collecting plate which is positioned inside the working chamber and is vertically arranged; the holes in the air collecting plate are increased gradually from top to bottom; an air collecting hood is installed on the outer side of the air collecting plate; the lower part of the air collecting hood is connected with an air discharging device through an air discharging tube; the air flow inside the working chamber is collected by the air collecting hood after horizontally passing through the air collecting plate and is discharged out by the air discharging device through the air discharging tube. By adopting a mutation hole mode, two positive pressure areas are formed at the working chamber, wherein the air pressure on one side close to working personnel is greater than the air pressure on the inner side; the air discharging system is put on the inner side of the working chamber; and by adopting a gradual change hole mode, the air flow inside the working chamber is collected by the air collecting hood after horizontally passing through the air connecting plate, and the phenomenon that the air flow rebounds below the working chamber is avoided.

Description

technical field [0001] The invention relates to a purification workbench, in particular to a double-layer flow purification workbench. Background technique [0002] In industrial production and scientific research, dust-free working environment is required in many places. The purification workbench can provide an effective working environment for these purposes and improve the efficiency of production and scientific research. However, there are some defects in the currently used workbench. Generally speaking, the clean workbench area maintains a positive pressure on the atmosphere, so that there are volatile substances in the work process that will be directly discharged to the body of the operator. This seriously affects the health of the operating personnel. At the same time, during the operation, when the hands and other parts of the operator enter the clean work area, a large amount of dust particles will also be brought in, which will affect the cleanliness of the cle...

AI Technical Summary

Problems solved by technology

[0004] Existing workbench exhaust systems all extract air from the bottom of the low positive pressure area, and the airflow passing through the diffuser plate often hits the bottom surface of the working chamber and then rebounds (airflow rebound phenomenon), resulting in relatively low airflow inside the working chamber. Confusion, not conducive to rapid discharge of volatile substances

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