Negative pressure weighing hood is widely used in microbial research, scientific experiment or pharmaceutical industry. It is a special local purification equipment for pharmaceutical, microbial research and scientific experiment. It mainly consists of working area, return air box, fan box, outlet air box and outer box. Today, Xiaobian will explain the principle, structure and operation of the negative pressure weighing cover.
Negative Pressure Weighing Cover 1 See King. jpg
Principle of negative pressure weighing cover
The downward subsidence low-pressure airflow flows into the operation area, resulting in a clean and sterile local environment. At the same time, 10% to 15% of the air flow is discharged and the air in the room is absorbed as a supplement. Therefore, the pressure in the weighing area is slightly negative to the external pressure in the weighing area, thus avoiding the leakage of materials and drugs in the weighing process. Cross-contamination between them.
Negative pressure weighing cover structure
The negative pressure weighing cover is composed of cover body, static pressure box, air supply box body, current sharing film, PAO detection port, touch screen, pressure difference sensor, fan, lighting lamp and other main components.
Operation of negative pressure weighing cover
1. Presentation after power-on: Eltek, Jiangsu, purifies the technology page, and then taps any position of the page to automatically present the next operation page.
2. Touch the "current user" to enter the password as an operator, and then touch the "frequency converter startup" fan to start normal operation. Adjusting the air supply volume (wind speed) of the fan can be realized by touching or to change the frequency of the frequency converter.
3. When stopping operation, touch "frequency converter stops" lightly and turn off the illumination lamp.
Cautions for operation of negative pressure weighing cover
1. Negative pressure weighing cover emergency stop button, usually can not press, only when an emergency occurs, can be used. When pressing the emergency stop button, only the fan power supply stops, lighting and other related equipment remains on.
2. Operators should always be under the negative pressure weighing cover when weighing.
3. Operators must wear uniforms, gloves, masks and other related protective devices in accordance with the regulations during the whole weighing process.
4. When using the negative pressure weighing cover, it should start up 10 minutes earlier.
5. When using touch LCD screen, the action should be gentle to prevent damage of touch LCD screen.
6. It is forbidden to wash with water and to place articles at the return air outlet.
Above is the knowledge introduction of the principle, structure and operation precautions of the negative pressure weighing cover. The negative pressure weighing cover provides the clean air to circulate in the working area, and produces the vertical one-way airflow. It expels the rest of the non-clean air outside the working area, so that the working area is in the working state of negative pressure. Effectively avoid pollution and ensure a highly clean working area.
Shandong Aide Purification Engineering Co., Ltd. has strong technical strength and construction experience, according to the different needs of clean places, using professional equipment, to form different levels of clean standard space, to create the most suitable production and working environment. At present, it has established close cooperation with many enterprises and is a trustworthy professional purifying project implementer. To learn more about the medical purification industry, please pay attention to the Wechat Public No. Aide-188 (Ed Purification and Oxygen Supply)