Flow-equalizing film device for improving hundred-grade laminar-flow air feeding uniformity

Abstract

The invention discloses a flow-equalizing film device for improving hundred-grade laminar-flow air feeding uniformity. The flow-equalizing film device comprises a framework and a composite flow-equalizing film body, wherein the framework is made from stainless steel or aluminum alloy, and is a square frame body structure; the composite flow-equalizing film body is compounded on one surface of theframework; the composite flow-equalizing film body comprises a woven supporting net and a high-molecular net film; the woven supporting net is woven by carbon fiber yarns via a single-layer plain structure; warp density of the woven supporting net is 3-200 / 10cm, and weft density of the woven supporting net is 3-200 / 10cm; and the high-molecular net film is a polytetrafluoroethylene net film; the high-molecular net film and the woven supporting net are compounded by hot-pressing. The composite flow-equalizing film body of the flow-equalizing film device can form static pressure at the upstream,so that air feeding uniformity below the flow-equalizing film can be effectively improved, and therefore, the flow-equalizing device has the advantages of being pervious to light, gas-permeable and easily cleaned, can effectively improve hundred-grade laminar-flow air feeding uniformity, and is good in use effect.

Description

technical field [0001] The invention relates to the technical field of purification equipment, in particular to a flow equalizing membrane device for improving the uniformity of hundred-level laminar air supply. Background technique [0002] Laminar flow hood is a special local purification equipment used in pharmaceutical, microbiological research and scientific experiments. It provides a vertical unidirectional airflow to generate positive pressure in the working area, and the gas is discharged from the operating area to prevent cross-contamination. It is used for Ensure a high cleanliness environment in the work area. [0003] The laminar flow hood adopts the airflow form of vertical unidirectional flow, and the return air must first pass through the pre-filtration of the primary and medium-efficiency filters to remove the large dust particles in the airflow to protect the high-efficiency filter. The pretreated air passes through the high-efficiency filter under the pres...

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Problems solved by technology

[0004] In order to solve the above-mentioned technical problems, the present invention provides a flow equalizing membrane device for improving the uniformity of 100-level laminar flow air supply. It adopts a composite membrane structure and cooperates with the frame to solve the mute effect of the existing flow equalizing membrane device. Poor, poor uniformity of air supply, unable to meet the needs of 100-level laminar air supply uniformity

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