extraction hood

简明释义

排烟罩

英英释义

例句

1.During the experiment, the fumes were directed into the extraction hood for proper ventilation.

在实验过程中，烟雾被引导到排气罩中以进行适当通风。

2.When using chemicals, always operate under a functioning extraction hood.

使用化学品时，请始终在正常工作的排气罩下操作。

3.The chef worked under an extraction hood to remove smoke and odors from the kitchen.

厨师在排气罩下工作，以去除厨房的烟雾和气味。

4.It's important to regularly clean the filters in the extraction hood to maintain its efficiency.

定期清洁排气罩中的过滤器对保持其效率至关重要。

5.The laboratory installed a new extraction hood to ensure the safety of its workers.

实验室安装了一个新的排气罩以确保工人的安全。

作文

In modern laboratories and industrial settings, safety and efficiency are of paramount importance. One crucial piece of equipment that plays a significant role in maintaining air quality and protecting workers is the extraction hood. An extraction hood (排气罩) is a ventilated enclosure designed to capture and remove hazardous fumes, vapors, and particles from the air. This device is essential for ensuring a safe working environment, especially when handling volatile chemicals or conducting experiments that produce harmful byproducts.The primary function of an extraction hood is to provide a controlled workspace where laboratory personnel can perform their tasks without the risk of inhaling toxic substances. These hoods work by using a fan to create negative pressure within the enclosure, which draws in contaminated air and filters it before releasing it back into the atmosphere or venting it outside. This process not only protects the health of the workers but also prevents the accumulation of hazardous materials in the laboratory.There are several types of extraction hoods, including ducted and ductless models. Ducted hoods are connected to a ventilation system that expels air outside the building, while ductless hoods use filters to clean the air before recirculating it back into the laboratory. Each type has its advantages and disadvantages, and the choice between them often depends on the specific requirements of the laboratory and the nature of the work being conducted.When using an extraction hood, it is vital for users to understand the proper protocols to ensure maximum effectiveness. For instance, users should always keep the sash at the recommended height to maintain optimal airflow. Additionally, it is important to avoid overcrowding the hood with equipment, as this can obstruct airflow and reduce the hood's efficiency. Regular maintenance and inspection of the extraction hood are also necessary to ensure that it functions correctly and continues to provide adequate protection.Beyond safety, extraction hoods also play a role in improving the overall efficiency of laboratory processes. By removing harmful contaminants from the workspace, these devices allow researchers to focus on their work without the distraction of potential hazards. Moreover, a clean and well-ventilated environment can enhance the accuracy of experiments, as the presence of airborne contaminants can interfere with sensitive measurements.In conclusion, the extraction hood (排气罩) is an indispensable tool in laboratories and industrial settings. Its ability to protect workers from hazardous substances while maintaining a clean working environment cannot be overstated. As research and industrial processes continue to evolve, the importance of effective ventilation systems, such as extraction hoods, will remain a critical aspect of workplace safety and efficiency. Therefore, understanding the functionality and proper use of extraction hoods is essential for anyone working in environments where hazardous materials are present.