Air quantity control method and device for clean workshop

Abstract

The invention discloses an air quantity control method and device for a clean workshop. The clean workshop comprises a clean space. The method comprises the following steps: the running state of the clean space is obtained, and the running state comprises a dynamic state and a static state; when the clean space is in the dynamic state, a real-time dust generation equivalent weight in the clean space is obtained on the basis of the running state of process equipment in the clean space and the number of personnel; a target ventilation rate corresponding to the clean space is obtained on the basis of the real-time dust generation equivalent weight; a target total air quantity needed by the clean space is obtained on the basis of the target ventilation rate; an air supply quantity corresponding to the clean space is dynamically adjusted according to an air quantity change speed corresponding to a preset first ventilation rate; and air supply is carried out on the clean space according to the air supply quantity, until a target total air quantity is reached. The air quantity control method and device for the clean workshop are capable of dynamically adjusting the air supply quantity inthe clean space as needed, effectively guaranteeing pressure difference in the clean space, and reducing the redundant air quantity to reduce the energy consumption.

Description

technical field [0001] The invention relates to an air volume control method and device for a clean workshop. Background technique [0002] Clean air-conditioning technology has penetrated into many fields such as hospitals, sanitation, electronics, aerospace, biosafety, and food. The core of clean air conditioning monitoring is the number of air changes and pressure difference control. In order to ensure the cleanliness requirements of the clean space, a large redundant air supply volume (number of air changes) and a high pressure difference are adopted in the design, even far exceeding the recommended value, resulting in high energy consumption of the clean air conditioner. No more. [0003] Conventional clean air conditioning control methods mainly include: manual adjustment, which is completely static. Once the adjustment is completed, the air supply volume (number of air changes) will generally remain unchanged, and the pressure difference will remain unchanged; On t...

AI Technical Summary

Problems solved by technology

An electric regulating valve is installed on the return air duct, and according to the detected value of the pressure difference, the PID feedback controls the opening of the return air valve and dynamically adjusts the return air volume. On the basis of manual adjustment, the air supply adopts a fixed variable air volume valve, and the air supply volume remains unchanged

The return air volume also remains unchanged, relying on maintaining the air volume difference (residual air volume) to ensure the pressure difference, this method has a large error, resulting in energy waste

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